/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.6.1.ufo.BOUNDED-12.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:00:24,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:00:24,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:00:24,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:00:24,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:00:24,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:00:24,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:00:24,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:00:24,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:00:24,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:00:24,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:00:24,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:00:24,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:00:24,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:00:24,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:00:24,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:00:24,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:00:24,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:00:24,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:00:24,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:00:24,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:00:24,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:00:24,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:00:24,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:00:24,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:00:24,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:00:24,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:00:24,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:00:24,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:00:24,904 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:00:24,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:00:24,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:00:24,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:00:24,906 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:00:24,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:00:24,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:00:24,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:00:24,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:00:24,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:00:24,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:00:24,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:00:24,908 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:00:24,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:00:24,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:00:24,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:00:24,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:00:24,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:00:24,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:00:24,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:00:24,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:00:24,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:00:24,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:00:24,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:00:24,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:00:24,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:00:25,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:00:25,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:00:25,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:00:25,343 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:00:25,343 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:00:25,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label01.c [2020-12-22 10:00:25,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae17ee7de/da64b80f93eb4a3dbeba84fe9b722f51/FLAGdc8c7f1c0 [2020-12-22 10:00:26,495 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:00:26,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label01.c [2020-12-22 10:00:26,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae17ee7de/da64b80f93eb4a3dbeba84fe9b722f51/FLAGdc8c7f1c0 [2020-12-22 10:00:26,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae17ee7de/da64b80f93eb4a3dbeba84fe9b722f51 [2020-12-22 10:00:26,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:00:26,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:00:26,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:26,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:00:26,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:00:26,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:26" (1/1) ... [2020-12-22 10:00:26,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb7e0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:26, skipping insertion in model container [2020-12-22 10:00:26,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:26" (1/1) ... [2020-12-22 10:00:26,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:00:27,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:00:27,482 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.6.1.ufo.BOUNDED-12.pals+Problem12_label01.c[15623,15636] [2020-12-22 10:00:27,552 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.6.1.ufo.BOUNDED-12.pals+Problem12_label01.c[20935,20948] [2020-12-22 10:00:28,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:28,741 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:00:28,809 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.6.1.ufo.BOUNDED-12.pals+Problem12_label01.c[15623,15636] [2020-12-22 10:00:28,860 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.6.1.ufo.BOUNDED-12.pals+Problem12_label01.c[20935,20948] [2020-12-22 10:00:29,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:29,640 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:00:29,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29 WrapperNode [2020-12-22 10:00:29,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:29,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:29,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:00:29,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:00:29,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (1/1) ... [2020-12-22 10:00:29,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (1/1) ... [2020-12-22 10:00:30,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:30,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:00:30,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:00:30,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:00:30,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (1/1) ... [2020-12-22 10:00:30,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (1/1) ... [2020-12-22 10:00:30,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (1/1) ... [2020-12-22 10:00:30,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (1/1) ... [2020-12-22 10:00:30,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (1/1) ... [2020-12-22 10:00:30,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (1/1) ... [2020-12-22 10:00:30,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (1/1) ... [2020-12-22 10:00:30,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:00:30,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:00:30,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:00:30,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:00:30,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (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 10:00:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:00:30,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:00:31,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:00:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:00:38,359 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:00:38,360 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:00:38,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:00:38 BoogieIcfgContainer [2020-12-22 10:00:38,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:00:38,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:00:38,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:00:38,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:00:38,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:00:26" (1/3) ... [2020-12-22 10:00:38,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4553a0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:00:38, skipping insertion in model container [2020-12-22 10:00:38,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:29" (2/3) ... [2020-12-22 10:00:38,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4553a0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:00:38, skipping insertion in model container [2020-12-22 10:00:38,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:00:38" (3/3) ... [2020-12-22 10:00:38,375 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label01.c [2020-12-22 10:00:38,383 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:00:38,391 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:00:38,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:00:38,457 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:00:38,458 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:00:38,458 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:00:38,458 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:00:38,458 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:00:38,458 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:00:38,458 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:00:38,459 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:00:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:00:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:00:38,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:38,510 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] [2020-12-22 10:00:38,511 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:38,522 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:00:38,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:38,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69081949] [2020-12-22 10:00:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:38,887 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 10:00:38,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69081949] [2020-12-22 10:00:38,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:38,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:00:38,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784780544] [2020-12-22 10:00:38,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:00:38,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:38,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:00:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:00:38,916 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 2 states. [2020-12-22 10:00:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:39,019 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2020-12-22 10:00:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:00:39,021 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:00:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:39,052 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 10:00:39,052 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:00:39,062 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 10:00:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:00:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:00:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:00:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2020-12-22 10:00:39,218 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2020-12-22 10:00:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:39,219 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2020-12-22 10:00:39,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:00:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2020-12-22 10:00:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:00:39,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:39,222 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] [2020-12-22 10:00:39,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:00:39,222 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:00:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:39,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928800380] [2020-12-22 10:00:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:39,382 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 10:00:39,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928800380] [2020-12-22 10:00:39,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:39,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:39,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864758522] [2020-12-22 10:00:39,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:00:39,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:00:39,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:00:39,388 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand 5 states. [2020-12-22 10:00:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:39,586 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2020-12-22 10:00:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:00:39,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:00:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:39,595 INFO L225 Difference]: With dead ends: 924 [2020-12-22 10:00:39,596 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:00:39,598 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 10:00:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:00:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:00:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:00:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2020-12-22 10:00:39,638 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2020-12-22 10:00:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:39,638 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2020-12-22 10:00:39,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:00:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2020-12-22 10:00:39,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:00:39,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:39,641 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] [2020-12-22 10:00:39,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:00:39,642 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:39,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1750363563, now seen corresponding path program 1 times [2020-12-22 10:00:39,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:39,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269724929] [2020-12-22 10:00:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:39,813 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 10:00:39,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269724929] [2020-12-22 10:00:39,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:39,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:00:39,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483930766] [2020-12-22 10:00:39,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:39,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:39,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:39,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:39,818 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand 3 states. [2020-12-22 10:00:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:48,245 INFO L93 Difference]: Finished difference Result 2364 states and 4453 transitions. [2020-12-22 10:00:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:48,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 10:00:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:48,261 INFO L225 Difference]: With dead ends: 2364 [2020-12-22 10:00:48,262 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:00:48,267 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 10:00:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:00:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:00:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:00:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2607 transitions. [2020-12-22 10:00:48,335 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2607 transitions. Word has length 48 [2020-12-22 10:00:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:48,336 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2607 transitions. [2020-12-22 10:00:48,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2607 transitions. [2020-12-22 10:00:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:00:48,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:48,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:48,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:00:48,340 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:48,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:48,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:00:48,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:48,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63257066] [2020-12-22 10:00:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:48,528 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 10:00:48,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63257066] [2020-12-22 10:00:48,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:48,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:48,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207898141] [2020-12-22 10:00:48,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:48,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:48,532 INFO L87 Difference]: Start difference. First operand 1611 states and 2607 transitions. Second operand 3 states. [2020-12-22 10:00:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:48,585 INFO L93 Difference]: Finished difference Result 1725 states and 2787 transitions. [2020-12-22 10:00:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:48,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:00:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:48,600 INFO L225 Difference]: With dead ends: 1725 [2020-12-22 10:00:48,600 INFO L226 Difference]: Without dead ends: 1665 [2020-12-22 10:00:48,602 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 10:00:48,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2020-12-22 10:00:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2020-12-22 10:00:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1663 states. [2020-12-22 10:00:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2690 transitions. [2020-12-22 10:00:48,662 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2690 transitions. Word has length 77 [2020-12-22 10:00:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:48,662 INFO L481 AbstractCegarLoop]: Abstraction has 1663 states and 2690 transitions. [2020-12-22 10:00:48,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2690 transitions. [2020-12-22 10:00:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:00:48,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:48,665 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] [2020-12-22 10:00:48,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:00:48,666 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:48,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:00:48,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:48,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364129448] [2020-12-22 10:00:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:48,845 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 10:00:48,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364129448] [2020-12-22 10:00:48,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:48,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:48,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473378474] [2020-12-22 10:00:48,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:48,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:48,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:48,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:48,848 INFO L87 Difference]: Start difference. First operand 1663 states and 2690 transitions. Second operand 3 states. [2020-12-22 10:00:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:48,900 INFO L93 Difference]: Finished difference Result 1875 states and 3026 transitions. [2020-12-22 10:00:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:48,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:00:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:48,916 INFO L225 Difference]: With dead ends: 1875 [2020-12-22 10:00:48,916 INFO L226 Difference]: Without dead ends: 1763 [2020-12-22 10:00:48,918 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 10:00:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2020-12-22 10:00:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2020-12-22 10:00:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 10:00:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2845 transitions. [2020-12-22 10:00:48,999 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2845 transitions. Word has length 77 [2020-12-22 10:00:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:49,002 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 2845 transitions. [2020-12-22 10:00:49,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2845 transitions. [2020-12-22 10:00:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:00:49,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:49,004 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] [2020-12-22 10:00:49,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:00:49,005 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:00:49,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:49,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720460920] [2020-12-22 10:00:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:49,249 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 10:00:49,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720460920] [2020-12-22 10:00:49,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:49,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:00:49,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738843247] [2020-12-22 10:00:49,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:00:49,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:49,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:00:49,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:49,252 INFO L87 Difference]: Start difference. First operand 1761 states and 2845 transitions. Second operand 8 states. [2020-12-22 10:00:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:49,865 INFO L93 Difference]: Finished difference Result 4281 states and 6841 transitions. [2020-12-22 10:00:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:00:49,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:00:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:49,898 INFO L225 Difference]: With dead ends: 4281 [2020-12-22 10:00:49,898 INFO L226 Difference]: Without dead ends: 4071 [2020-12-22 10:00:49,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:00:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2020-12-22 10:00:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2020-12-22 10:00:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-12-22 10:00:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3169 transitions. [2020-12-22 10:00:50,001 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3169 transitions. Word has length 77 [2020-12-22 10:00:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:50,001 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 3169 transitions. [2020-12-22 10:00:50,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:00:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3169 transitions. [2020-12-22 10:00:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:50,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:50,005 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] [2020-12-22 10:00:50,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:00:50,011 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:00:50,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:50,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225131164] [2020-12-22 10:00:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:50,162 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 10:00:50,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225131164] [2020-12-22 10:00:50,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:50,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:50,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428164049] [2020-12-22 10:00:50,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:50,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:50,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:50,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:50,166 INFO L87 Difference]: Start difference. First operand 1969 states and 3169 transitions. Second operand 3 states. [2020-12-22 10:00:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:50,255 INFO L93 Difference]: Finished difference Result 2589 states and 4141 transitions. [2020-12-22 10:00:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:50,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:50,271 INFO L225 Difference]: With dead ends: 2589 [2020-12-22 10:00:50,271 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:00:50,273 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 10:00:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:00:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:00:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:00:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3477 transitions. [2020-12-22 10:00:50,370 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3477 transitions. Word has length 79 [2020-12-22 10:00:50,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:50,372 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3477 transitions. [2020-12-22 10:00:50,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3477 transitions. [2020-12-22 10:00:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:50,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:50,378 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] [2020-12-22 10:00:50,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:00:50,379 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:50,380 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:00:50,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:50,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857833729] [2020-12-22 10:00:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:50,781 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 10:00:50,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857833729] [2020-12-22 10:00:50,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:50,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:00:50,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704497316] [2020-12-22 10:00:50,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:00:50,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:00:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:50,784 INFO L87 Difference]: Start difference. First operand 2169 states and 3477 transitions. Second operand 8 states. [2020-12-22 10:00:51,167 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 10:00:51,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:51,351 INFO L93 Difference]: Finished difference Result 2787 states and 4441 transitions. [2020-12-22 10:00:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:00:51,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:00:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:51,365 INFO L225 Difference]: With dead ends: 2787 [2020-12-22 10:00:51,365 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:00:51,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:00:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:00:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:00:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:00:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3471 transitions. [2020-12-22 10:00:51,463 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3471 transitions. Word has length 79 [2020-12-22 10:00:51,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:51,463 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3471 transitions. [2020-12-22 10:00:51,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:00:51,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3471 transitions. [2020-12-22 10:00:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:51,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:51,468 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] [2020-12-22 10:00:51,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:00:51,470 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:51,471 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:00:51,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:51,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786751470] [2020-12-22 10:00:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:51,623 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 10:00:51,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786751470] [2020-12-22 10:00:51,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:51,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:51,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679456034] [2020-12-22 10:00:51,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:51,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:51,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:51,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:51,626 INFO L87 Difference]: Start difference. First operand 2169 states and 3471 transitions. Second operand 3 states. [2020-12-22 10:00:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:51,722 INFO L93 Difference]: Finished difference Result 3329 states and 5265 transitions. [2020-12-22 10:00:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:51,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:51,739 INFO L225 Difference]: With dead ends: 3329 [2020-12-22 10:00:51,739 INFO L226 Difference]: Without dead ends: 2713 [2020-12-22 10:00:51,742 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 10:00:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2020-12-22 10:00:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2020-12-22 10:00:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2711 states. [2020-12-22 10:00:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4295 transitions. [2020-12-22 10:00:51,872 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4295 transitions. Word has length 79 [2020-12-22 10:00:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:51,872 INFO L481 AbstractCegarLoop]: Abstraction has 2711 states and 4295 transitions. [2020-12-22 10:00:51,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4295 transitions. [2020-12-22 10:00:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:51,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:51,874 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] [2020-12-22 10:00:51,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:00:51,874 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:51,875 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:00:51,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:51,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110978242] [2020-12-22 10:00:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:51,965 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 10:00:51,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110978242] [2020-12-22 10:00:51,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:51,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:51,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39349453] [2020-12-22 10:00:51,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:51,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:51,968 INFO L87 Difference]: Start difference. First operand 2711 states and 4295 transitions. Second operand 3 states. [2020-12-22 10:00:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:52,115 INFO L93 Difference]: Finished difference Result 4883 states and 7617 transitions. [2020-12-22 10:00:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:52,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:52,140 INFO L225 Difference]: With dead ends: 4883 [2020-12-22 10:00:52,140 INFO L226 Difference]: Without dead ends: 3725 [2020-12-22 10:00:52,145 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 10:00:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2020-12-22 10:00:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2020-12-22 10:00:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2020-12-22 10:00:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5811 transitions. [2020-12-22 10:00:52,362 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5811 transitions. Word has length 79 [2020-12-22 10:00:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:52,363 INFO L481 AbstractCegarLoop]: Abstraction has 3723 states and 5811 transitions. [2020-12-22 10:00:52,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5811 transitions. [2020-12-22 10:00:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:52,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:52,364 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] [2020-12-22 10:00:52,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:00:52,365 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:52,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:00:52,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:52,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224609614] [2020-12-22 10:00:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:52,454 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 10:00:52,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224609614] [2020-12-22 10:00:52,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:52,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:52,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829807615] [2020-12-22 10:00:52,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:52,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:52,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:52,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:52,458 INFO L87 Difference]: Start difference. First operand 3723 states and 5811 transitions. Second operand 3 states. [2020-12-22 10:00:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:52,725 INFO L93 Difference]: Finished difference Result 7775 states and 11925 transitions. [2020-12-22 10:00:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:52,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:52,778 INFO L225 Difference]: With dead ends: 7775 [2020-12-22 10:00:52,778 INFO L226 Difference]: Without dead ends: 5605 [2020-12-22 10:00:52,785 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 10:00:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2020-12-22 10:00:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2020-12-22 10:00:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2020-12-22 10:00:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8579 transitions. [2020-12-22 10:00:53,143 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8579 transitions. Word has length 79 [2020-12-22 10:00:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:53,144 INFO L481 AbstractCegarLoop]: Abstraction has 5603 states and 8579 transitions. [2020-12-22 10:00:53,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8579 transitions. [2020-12-22 10:00:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:53,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:53,145 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] [2020-12-22 10:00:53,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:00:53,146 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:53,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:00:53,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:53,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132479169] [2020-12-22 10:00:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:53,217 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 10:00:53,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132479169] [2020-12-22 10:00:53,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:53,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:53,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41216460] [2020-12-22 10:00:53,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:53,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:53,220 INFO L87 Difference]: Start difference. First operand 5603 states and 8579 transitions. Second operand 3 states. [2020-12-22 10:00:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:53,734 INFO L93 Difference]: Finished difference Result 13127 states and 19749 transitions. [2020-12-22 10:00:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:53,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:53,758 INFO L225 Difference]: With dead ends: 13127 [2020-12-22 10:00:53,758 INFO L226 Difference]: Without dead ends: 9077 [2020-12-22 10:00:53,765 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 10:00:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2020-12-22 10:00:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2020-12-22 10:00:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9075 states. [2020-12-22 10:00:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13587 transitions. [2020-12-22 10:00:54,344 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13587 transitions. Word has length 79 [2020-12-22 10:00:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:54,344 INFO L481 AbstractCegarLoop]: Abstraction has 9075 states and 13587 transitions. [2020-12-22 10:00:54,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13587 transitions. [2020-12-22 10:00:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:00:54,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:54,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:54,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:00:54,346 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:54,347 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:00:54,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:54,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145756611] [2020-12-22 10:00:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:54,500 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 10:00:54,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145756611] [2020-12-22 10:00:54,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:54,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:00:54,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184278905] [2020-12-22 10:00:54,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:00:54,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:00:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:54,510 INFO L87 Difference]: Start difference. First operand 9075 states and 13587 transitions. Second operand 8 states. [2020-12-22 10:00:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:55,781 INFO L93 Difference]: Finished difference Result 15538 states and 22858 transitions. [2020-12-22 10:00:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:00:55,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:00:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:55,824 INFO L225 Difference]: With dead ends: 15538 [2020-12-22 10:00:55,824 INFO L226 Difference]: Without dead ends: 15536 [2020-12-22 10:00:55,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:00:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2020-12-22 10:00:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2020-12-22 10:00:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:00:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 13939 transitions. [2020-12-22 10:00:56,713 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 13939 transitions. Word has length 80 [2020-12-22 10:00:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:56,713 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 13939 transitions. [2020-12-22 10:00:56,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:00:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 13939 transitions. [2020-12-22 10:00:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:00:56,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:56,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-12-22 10:00:56,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:00:56,722 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:56,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:00:56,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:56,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310903355] [2020-12-22 10:00:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:00:56,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310903355] [2020-12-22 10:00:56,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:56,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:00:56,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155476765] [2020-12-22 10:00:56,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:00:56,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:00:56,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:56,934 INFO L87 Difference]: Start difference. First operand 9459 states and 13939 transitions. Second operand 8 states. [2020-12-22 10:00:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:59,875 INFO L93 Difference]: Finished difference Result 58465 states and 84650 transitions. [2020-12-22 10:00:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:00:59,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:00:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:59,988 INFO L225 Difference]: With dead ends: 58465 [2020-12-22 10:00:59,988 INFO L226 Difference]: Without dead ends: 50559 [2020-12-22 10:01:00,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2020-12-22 10:01:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 17363. [2020-12-22 10:01:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17363 states. [2020-12-22 10:01:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17363 states to 17363 states and 25267 transitions. [2020-12-22 10:01:01,769 INFO L78 Accepts]: Start accepts. Automaton has 17363 states and 25267 transitions. Word has length 112 [2020-12-22 10:01:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:01,769 INFO L481 AbstractCegarLoop]: Abstraction has 17363 states and 25267 transitions. [2020-12-22 10:01:01,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 17363 states and 25267 transitions. [2020-12-22 10:01:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:01,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:01,779 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] [2020-12-22 10:01:01,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:01:01,779 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:01,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:01,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:01:01,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:01,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990123379] [2020-12-22 10:01:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:01,978 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 10:01:01,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990123379] [2020-12-22 10:01:01,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:01,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:01,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490393485] [2020-12-22 10:01:01,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:01,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:01,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:01,981 INFO L87 Difference]: Start difference. First operand 17363 states and 25267 transitions. Second operand 8 states. [2020-12-22 10:01:04,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:04,941 INFO L93 Difference]: Finished difference Result 66369 states and 95978 transitions. [2020-12-22 10:01:04,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:04,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:05,094 INFO L225 Difference]: With dead ends: 66369 [2020-12-22 10:01:05,094 INFO L226 Difference]: Without dead ends: 58463 [2020-12-22 10:01:05,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58463 states. [2020-12-22 10:01:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58463 to 29235. [2020-12-22 10:01:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29235 states. [2020-12-22 10:01:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29235 states to 29235 states and 42179 transitions. [2020-12-22 10:01:06,959 INFO L78 Accepts]: Start accepts. Automaton has 29235 states and 42179 transitions. Word has length 112 [2020-12-22 10:01:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:06,959 INFO L481 AbstractCegarLoop]: Abstraction has 29235 states and 42179 transitions. [2020-12-22 10:01:06,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 29235 states and 42179 transitions. [2020-12-22 10:01:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:06,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:06,974 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] [2020-12-22 10:01:06,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:01:06,974 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:06,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:06,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:01:06,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:06,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9635388] [2020-12-22 10:01:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:07,178 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 10:01:07,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9635388] [2020-12-22 10:01:07,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:07,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:07,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908717519] [2020-12-22 10:01:07,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:07,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:07,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:07,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:07,180 INFO L87 Difference]: Start difference. First operand 29235 states and 42179 transitions. Second operand 8 states. [2020-12-22 10:01:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:10,737 INFO L93 Difference]: Finished difference Result 74273 states and 107306 transitions. [2020-12-22 10:01:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:10,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:10,886 INFO L225 Difference]: With dead ends: 74273 [2020-12-22 10:01:10,887 INFO L226 Difference]: Without dead ends: 66367 [2020-12-22 10:01:11,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:11,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66367 states. [2020-12-22 10:01:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66367 to 37139. [2020-12-22 10:01:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37139 states. [2020-12-22 10:01:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37139 states to 37139 states and 53507 transitions. [2020-12-22 10:01:13,808 INFO L78 Accepts]: Start accepts. Automaton has 37139 states and 53507 transitions. Word has length 112 [2020-12-22 10:01:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:13,809 INFO L481 AbstractCegarLoop]: Abstraction has 37139 states and 53507 transitions. [2020-12-22 10:01:13,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 37139 states and 53507 transitions. [2020-12-22 10:01:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:13,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:13,818 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] [2020-12-22 10:01:13,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:01:13,818 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:01:13,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:13,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273011404] [2020-12-22 10:01:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:01:13,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273011404] [2020-12-22 10:01:13,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:13,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:13,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098613494] [2020-12-22 10:01:13,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:13,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:13,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:13,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:13,981 INFO L87 Difference]: Start difference. First operand 37139 states and 53507 transitions. Second operand 8 states. [2020-12-22 10:01:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:18,304 INFO L93 Difference]: Finished difference Result 82177 states and 118634 transitions. [2020-12-22 10:01:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:18,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:18,413 INFO L225 Difference]: With dead ends: 82177 [2020-12-22 10:01:18,413 INFO L226 Difference]: Without dead ends: 74271 [2020-12-22 10:01:18,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74271 states. [2020-12-22 10:01:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74271 to 45043. [2020-12-22 10:01:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45043 states. [2020-12-22 10:01:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45043 states to 45043 states and 64835 transitions. [2020-12-22 10:01:21,690 INFO L78 Accepts]: Start accepts. Automaton has 45043 states and 64835 transitions. Word has length 112 [2020-12-22 10:01:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:21,690 INFO L481 AbstractCegarLoop]: Abstraction has 45043 states and 64835 transitions. [2020-12-22 10:01:21,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 45043 states and 64835 transitions. [2020-12-22 10:01:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:21,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:21,702 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] [2020-12-22 10:01:21,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:01:21,703 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:01:21,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:21,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318196912] [2020-12-22 10:01:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:01:21,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318196912] [2020-12-22 10:01:21,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:21,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:21,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827173199] [2020-12-22 10:01:21,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:21,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:21,892 INFO L87 Difference]: Start difference. First operand 45043 states and 64835 transitions. Second operand 8 states. [2020-12-22 10:01:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:27,584 INFO L93 Difference]: Finished difference Result 90081 states and 129962 transitions. [2020-12-22 10:01:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:27,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:27,687 INFO L225 Difference]: With dead ends: 90081 [2020-12-22 10:01:27,688 INFO L226 Difference]: Without dead ends: 82175 [2020-12-22 10:01:27,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82175 states. [2020-12-22 10:01:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82175 to 52947. [2020-12-22 10:01:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52947 states. [2020-12-22 10:01:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52947 states to 52947 states and 76163 transitions. [2020-12-22 10:01:31,414 INFO L78 Accepts]: Start accepts. Automaton has 52947 states and 76163 transitions. Word has length 112 [2020-12-22 10:01:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:31,415 INFO L481 AbstractCegarLoop]: Abstraction has 52947 states and 76163 transitions. [2020-12-22 10:01:31,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 52947 states and 76163 transitions. [2020-12-22 10:01:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:31,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:31,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-12-22 10:01:31,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:01:31,423 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:31,424 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:01:31,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:31,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869109710] [2020-12-22 10:01:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:01:31,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869109710] [2020-12-22 10:01:31,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:31,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:31,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817457569] [2020-12-22 10:01:31,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:31,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:31,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:31,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:31,584 INFO L87 Difference]: Start difference. First operand 52947 states and 76163 transitions. Second operand 8 states. [2020-12-22 10:01:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:37,849 INFO L93 Difference]: Finished difference Result 93185 states and 134442 transitions. [2020-12-22 10:01:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:37,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:37,936 INFO L225 Difference]: With dead ends: 93185 [2020-12-22 10:01:37,936 INFO L226 Difference]: Without dead ends: 87679 [2020-12-22 10:01:37,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87679 states. [2020-12-22 10:01:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87679 to 58451. [2020-12-22 10:01:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58451 states. [2020-12-22 10:01:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58451 states to 58451 states and 84099 transitions. [2020-12-22 10:01:42,446 INFO L78 Accepts]: Start accepts. Automaton has 58451 states and 84099 transitions. Word has length 112 [2020-12-22 10:01:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:42,446 INFO L481 AbstractCegarLoop]: Abstraction has 58451 states and 84099 transitions. [2020-12-22 10:01:42,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 58451 states and 84099 transitions. [2020-12-22 10:01:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:01:42,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:42,456 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2020-12-22 10:01:42,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:01:42,456 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:01:42,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:42,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061220907] [2020-12-22 10:01:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:42,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061220907] [2020-12-22 10:01:42,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:42,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:42,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2833463] [2020-12-22 10:01:42,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:42,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:42,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:42,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:42,535 INFO L87 Difference]: Start difference. First operand 58451 states and 84099 transitions. Second operand 3 states. [2020-12-22 10:01:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:46,650 INFO L93 Difference]: Finished difference Result 115351 states and 165685 transitions. [2020-12-22 10:01:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:46,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:01:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:46,720 INFO L225 Difference]: With dead ends: 115351 [2020-12-22 10:01:46,720 INFO L226 Difference]: Without dead ends: 58453 [2020-12-22 10:01:46,755 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 10:01:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58453 states. [2020-12-22 10:01:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58453 to 58451. [2020-12-22 10:01:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58451 states. [2020-12-22 10:01:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58451 states to 58451 states and 83411 transitions. [2020-12-22 10:01:51,045 INFO L78 Accepts]: Start accepts. Automaton has 58451 states and 83411 transitions. Word has length 113 [2020-12-22 10:01:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:51,046 INFO L481 AbstractCegarLoop]: Abstraction has 58451 states and 83411 transitions. [2020-12-22 10:01:51,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:51,046 INFO L276 IsEmpty]: Start isEmpty. Operand 58451 states and 83411 transitions. [2020-12-22 10:01:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:01:51,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:51,051 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-12-22 10:01:51,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:01:51,051 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:01:51,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:51,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389084157] [2020-12-22 10:01:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:51,139 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 10:01:51,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389084157] [2020-12-22 10:01:51,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:51,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:51,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391926247] [2020-12-22 10:01:51,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:51,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:51,141 INFO L87 Difference]: Start difference. First operand 58451 states and 83411 transitions. Second operand 3 states. [2020-12-22 10:01:53,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:53,369 INFO L93 Difference]: Finished difference Result 86903 states and 123861 transitions. [2020-12-22 10:01:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:53,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:01:53,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:53,399 INFO L225 Difference]: With dead ends: 86903 [2020-12-22 10:01:53,399 INFO L226 Difference]: Without dead ends: 30005 [2020-12-22 10:01:53,422 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 10:01:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30005 states. [2020-12-22 10:01:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30005 to 30003. [2020-12-22 10:01:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30003 states. [2020-12-22 10:01:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30003 states to 30003 states and 42619 transitions. [2020-12-22 10:01:55,624 INFO L78 Accepts]: Start accepts. Automaton has 30003 states and 42619 transitions. Word has length 113 [2020-12-22 10:01:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:55,625 INFO L481 AbstractCegarLoop]: Abstraction has 30003 states and 42619 transitions. [2020-12-22 10:01:55,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 30003 states and 42619 transitions. [2020-12-22 10:01:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:01:55,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:55,628 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] [2020-12-22 10:01:55,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:01:55,628 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:01:55,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:55,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956272152] [2020-12-22 10:01:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:55,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956272152] [2020-12-22 10:01:55,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:55,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:55,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588397302] [2020-12-22 10:01:55,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:55,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:55,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:55,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:55,739 INFO L87 Difference]: Start difference. First operand 30003 states and 42619 transitions. Second operand 3 states. [2020-12-22 10:01:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:56,876 INFO L93 Difference]: Finished difference Result 44231 states and 62673 transitions. [2020-12-22 10:01:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:56,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:01:56,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:56,901 INFO L225 Difference]: With dead ends: 44231 [2020-12-22 10:01:56,901 INFO L226 Difference]: Without dead ends: 15781 [2020-12-22 10:01:56,918 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 10:01:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15781 states. [2020-12-22 10:01:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15781 to 15779. [2020-12-22 10:01:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15779 states. [2020-12-22 10:01:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 22395 transitions. [2020-12-22 10:01:58,081 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 22395 transitions. Word has length 113 [2020-12-22 10:01:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:58,081 INFO L481 AbstractCegarLoop]: Abstraction has 15779 states and 22395 transitions. [2020-12-22 10:01:58,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 22395 transitions. [2020-12-22 10:01:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:01:58,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:58,084 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] [2020-12-22 10:01:58,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:01:58,084 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:58,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:58,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:01:58,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:58,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244435953] [2020-12-22 10:01:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:58,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244435953] [2020-12-22 10:01:58,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:58,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:58,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606517340] [2020-12-22 10:01:58,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:58,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:58,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:58,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:58,183 INFO L87 Difference]: Start difference. First operand 15779 states and 22395 transitions. Second operand 3 states. [2020-12-22 10:01:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:58,852 INFO L93 Difference]: Finished difference Result 22895 states and 32337 transitions. [2020-12-22 10:01:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:58,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:01:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:58,862 INFO L225 Difference]: With dead ends: 22895 [2020-12-22 10:01:58,863 INFO L226 Difference]: Without dead ends: 8669 [2020-12-22 10:01:58,871 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 10:01:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8669 states. [2020-12-22 10:01:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8669 to 8667. [2020-12-22 10:01:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8667 states. [2020-12-22 10:01:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 12369 transitions. [2020-12-22 10:01:59,468 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 12369 transitions. Word has length 113 [2020-12-22 10:01:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:59,469 INFO L481 AbstractCegarLoop]: Abstraction has 8667 states and 12369 transitions. [2020-12-22 10:01:59,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 12369 transitions. [2020-12-22 10:01:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:01:59,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:59,471 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:01:59,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:01:59,471 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:59,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:59,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:01:59,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:59,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986126779] [2020-12-22 10:01:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:59,809 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-22 10:01:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:59,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986126779] [2020-12-22 10:01:59,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601328580] [2020-12-22 10:01:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:02:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:00,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:02:00,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:02:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:02:00,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:02:00,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:02:00,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378315969] [2020-12-22 10:02:00,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:02:00,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:02:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:02:00,706 INFO L87 Difference]: Start difference. First operand 8667 states and 12369 transitions. Second operand 21 states. [2020-12-22 10:02:01,392 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:02:05,552 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-22 10:02:05,853 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:02:06,099 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:02:06,402 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:02:06,728 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:02:07,063 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:02:07,514 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:02:11,616 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 10:02:11,852 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 10:02:12,136 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:02:12,462 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:02:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:13,862 INFO L93 Difference]: Finished difference Result 56546 states and 77674 transitions. [2020-12-22 10:02:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:02:13,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:02:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:14,001 INFO L225 Difference]: With dead ends: 56546 [2020-12-22 10:02:14,001 INFO L226 Difference]: Without dead ends: 49432 [2020-12-22 10:02:14,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:02:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49432 states. [2020-12-22 10:02:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49432 to 31687. [2020-12-22 10:02:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31687 states. [2020-12-22 10:02:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31687 states to 31687 states and 43537 transitions. [2020-12-22 10:02:16,888 INFO L78 Accepts]: Start accepts. Automaton has 31687 states and 43537 transitions. Word has length 113 [2020-12-22 10:02:16,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:16,888 INFO L481 AbstractCegarLoop]: Abstraction has 31687 states and 43537 transitions. [2020-12-22 10:02:16,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:02:16,888 INFO L276 IsEmpty]: Start isEmpty. Operand 31687 states and 43537 transitions. [2020-12-22 10:02:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:02:16,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:16,893 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:02:17,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:02:17,109 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:17,110 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:02:17,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:17,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131310596] [2020-12-22 10:02:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:17,573 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2020-12-22 10:02:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:17,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131310596] [2020-12-22 10:02:17,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968428907] [2020-12-22 10:02:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:02:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:17,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:02:17,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:02:18,244 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:02:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:18,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:02:18,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:02:18,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430684217] [2020-12-22 10:02:18,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:02:18,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:02:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:02:18,684 INFO L87 Difference]: Start difference. First operand 31687 states and 43537 transitions. Second operand 18 states. [2020-12-22 10:02:18,848 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:02:18,982 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:02:19,116 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:02:19,295 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:02:19,481 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:19,984 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:20,375 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 10:02:20,542 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:20,670 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2020-12-22 10:02:20,973 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:21,121 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:21,677 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:02:21,869 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:22,008 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-12-22 10:02:22,161 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:22,381 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:22,579 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:02:22,827 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:23,076 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:23,224 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:23,376 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:23,569 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:02:23,716 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:23,950 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:25,824 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:02:26,000 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:02:26,150 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-12-22 10:02:26,554 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:02:26,784 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:02:26,985 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:02:27,156 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:02:27,343 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 10:02:27,503 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:27,746 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:02:27,948 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:28,380 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:28,944 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 10:02:29,099 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:29,295 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:02:29,457 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:29,777 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:02:30,085 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-12-22 10:02:30,669 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:02:30,859 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:02:31,052 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:02:31,279 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:31,952 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:32,101 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:32,297 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:02:32,750 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:02:33,922 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:34,153 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:34,649 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:34,916 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:02:35,105 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:35,300 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:02:35,496 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:35,643 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:35,963 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:02:36,232 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:02:36,426 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:02:36,620 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:02:36,886 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:02:37,058 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:37,433 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:02:37,773 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:02:37,995 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:02:41,714 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 10:02:41,877 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:42,089 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:02:42,295 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:42,592 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:02:42,809 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:02:42,986 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:02:43,702 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 10:02:43,853 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:44,108 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:02:44,272 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:44,927 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:02:45,092 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:03:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:10,375 INFO L93 Difference]: Finished difference Result 351947 states and 476186 transitions. [2020-12-22 10:03:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:03:10,376 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:03:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:11,180 INFO L225 Difference]: With dead ends: 351947 [2020-12-22 10:03:11,181 INFO L226 Difference]: Without dead ends: 321813 [2020-12-22 10:03:11,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:03:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321813 states. [2020-12-22 10:03:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321813 to 137964. [2020-12-22 10:03:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137964 states. [2020-12-22 10:03:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137964 states to 137964 states and 185063 transitions. [2020-12-22 10:03:26,769 INFO L78 Accepts]: Start accepts. Automaton has 137964 states and 185063 transitions. Word has length 114 [2020-12-22 10:03:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:26,769 INFO L481 AbstractCegarLoop]: Abstraction has 137964 states and 185063 transitions. [2020-12-22 10:03:26,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:03:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 137964 states and 185063 transitions. [2020-12-22 10:03:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:26,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:26,773 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:03:26,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:03:26,977 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:03:26,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:26,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317425286] [2020-12-22 10:03:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:27,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317425286] [2020-12-22 10:03:27,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:27,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:27,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24577255] [2020-12-22 10:03:27,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:27,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:27,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:27,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:27,068 INFO L87 Difference]: Start difference. First operand 137964 states and 185063 transitions. Second operand 3 states. [2020-12-22 10:03:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:32,957 INFO L93 Difference]: Finished difference Result 190056 states and 254198 transitions. [2020-12-22 10:03:32,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:32,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:03:32,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:33,039 INFO L225 Difference]: With dead ends: 190056 [2020-12-22 10:03:33,039 INFO L226 Difference]: Without dead ends: 53645 [2020-12-22 10:03:33,100 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 10:03:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53645 states. [2020-12-22 10:03:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53645 to 50169. [2020-12-22 10:03:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50169 states. [2020-12-22 10:03:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50169 states to 50169 states and 66645 transitions. [2020-12-22 10:03:38,327 INFO L78 Accepts]: Start accepts. Automaton has 50169 states and 66645 transitions. Word has length 114 [2020-12-22 10:03:38,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:38,327 INFO L481 AbstractCegarLoop]: Abstraction has 50169 states and 66645 transitions. [2020-12-22 10:03:38,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 50169 states and 66645 transitions. [2020-12-22 10:03:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:38,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:38,330 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:03:38,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:03:38,331 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:03:38,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:38,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136761936] [2020-12-22 10:03:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:03:38,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136761936] [2020-12-22 10:03:38,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:38,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:38,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246945175] [2020-12-22 10:03:38,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:38,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:38,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:38,464 INFO L87 Difference]: Start difference. First operand 50169 states and 66645 transitions. Second operand 6 states. [2020-12-22 10:03:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:41,429 INFO L93 Difference]: Finished difference Result 74769 states and 99507 transitions. [2020-12-22 10:03:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:03:41,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:03:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:41,459 INFO L225 Difference]: With dead ends: 74769 [2020-12-22 10:03:41,460 INFO L226 Difference]: Without dead ends: 26270 [2020-12-22 10:03:41,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:03:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26270 states. [2020-12-22 10:03:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26270 to 26270. [2020-12-22 10:03:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26270 states. [2020-12-22 10:03:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26270 states to 26270 states and 35161 transitions. [2020-12-22 10:03:44,279 INFO L78 Accepts]: Start accepts. Automaton has 26270 states and 35161 transitions. Word has length 114 [2020-12-22 10:03:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:44,279 INFO L481 AbstractCegarLoop]: Abstraction has 26270 states and 35161 transitions. [2020-12-22 10:03:44,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:03:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 26270 states and 35161 transitions. [2020-12-22 10:03:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:44,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:44,282 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:03:44,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:03:44,282 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:44,282 INFO L82 PathProgramCache]: Analyzing trace with hash 125621387, now seen corresponding path program 1 times [2020-12-22 10:03:44,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:44,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27433419] [2020-12-22 10:03:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:03:44,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27433419] [2020-12-22 10:03:44,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:44,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:44,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786013603] [2020-12-22 10:03:44,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:44,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:44,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:44,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:44,388 INFO L87 Difference]: Start difference. First operand 26270 states and 35161 transitions. Second operand 6 states. [2020-12-22 10:03:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:46,740 INFO L93 Difference]: Finished difference Result 45263 states and 60258 transitions. [2020-12-22 10:03:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:03:46,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:03:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:46,763 INFO L225 Difference]: With dead ends: 45263 [2020-12-22 10:03:46,763 INFO L226 Difference]: Without dead ends: 20701 [2020-12-22 10:03:46,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:03:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20701 states. [2020-12-22 10:03:48,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20701 to 20701. [2020-12-22 10:03:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20701 states. [2020-12-22 10:03:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20701 states to 20701 states and 27499 transitions. [2020-12-22 10:03:48,991 INFO L78 Accepts]: Start accepts. Automaton has 20701 states and 27499 transitions. Word has length 114 [2020-12-22 10:03:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:48,991 INFO L481 AbstractCegarLoop]: Abstraction has 20701 states and 27499 transitions. [2020-12-22 10:03:48,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:03:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 20701 states and 27499 transitions. [2020-12-22 10:03:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:48,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:48,993 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:03:48,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:03:48,993 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:48,994 INFO L82 PathProgramCache]: Analyzing trace with hash -165021109, now seen corresponding path program 1 times [2020-12-22 10:03:48,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:48,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878898068] [2020-12-22 10:03:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 10:03:49,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878898068] [2020-12-22 10:03:49,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:49,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:49,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060774638] [2020-12-22 10:03:49,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:49,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:49,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:49,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:49,093 INFO L87 Difference]: Start difference. First operand 20701 states and 27499 transitions. Second operand 6 states. [2020-12-22 10:03:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:52,971 INFO L93 Difference]: Finished difference Result 54989 states and 72859 transitions. [2020-12-22 10:03:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:03:52,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:03:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:53,009 INFO L225 Difference]: With dead ends: 54989 [2020-12-22 10:03:53,010 INFO L226 Difference]: Without dead ends: 35885 [2020-12-22 10:03:53,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:03:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35885 states. [2020-12-22 10:03:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35885 to 31923. [2020-12-22 10:03:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31923 states. [2020-12-22 10:03:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31923 states to 31923 states and 42102 transitions. [2020-12-22 10:03:56,568 INFO L78 Accepts]: Start accepts. Automaton has 31923 states and 42102 transitions. Word has length 114 [2020-12-22 10:03:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:56,568 INFO L481 AbstractCegarLoop]: Abstraction has 31923 states and 42102 transitions. [2020-12-22 10:03:56,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:03:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31923 states and 42102 transitions. [2020-12-22 10:03:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 10:03:56,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:56,571 INFO L422 BasicCegarLoop]: trace histogram [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 10:03:56,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 10:03:56,571 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:56,571 INFO L82 PathProgramCache]: Analyzing trace with hash 278857549, now seen corresponding path program 1 times [2020-12-22 10:03:56,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:56,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234274542] [2020-12-22 10:03:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:56,820 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2020-12-22 10:03:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:56,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234274542] [2020-12-22 10:03:56,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556384839] [2020-12-22 10:03:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:03:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:03:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:03:57,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:03:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:57,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:03:57,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 10:03:57,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974621207] [2020-12-22 10:03:57,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:03:57,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:57,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:03:57,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:03:57,727 INFO L87 Difference]: Start difference. First operand 31923 states and 42102 transitions. Second operand 17 states. [2020-12-22 10:04:07,025 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29