/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.3.ufo.UNBOUNDED.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:37:12,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:37:12,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:37:12,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:37:12,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:37:12,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:37:12,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:37:12,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:37:12,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:37:12,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:37:12,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:37:12,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:37:12,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:37:12,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:37:12,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:37:12,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:37:12,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:37:12,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:37:12,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:37:12,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:37:12,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:37:12,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:37:12,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:37:12,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:37:12,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:37:12,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:37:12,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:37:12,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:37:12,826 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:37:12,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:37:12,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:37:12,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:37:12,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:37:12,860 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:37:12,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:37:12,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:37:12,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:37:12,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:37:12,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:37:12,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:37:12,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:37:12,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:37:12,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:37:12,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:37:12,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:37:12,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:37:12,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:37:12,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:37:12,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:37:12,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:37:12,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:37:12,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:37:12,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:37:12,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:37:12,865 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:37:13,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:37:13,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:37:13,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:37:13,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:37:13,356 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:37:13,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 09:37:13,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c581832/0e6e977bae554f599ba5b07cdef17102/FLAG705ff1c3d [2020-12-22 09:37:14,463 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:37:14,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 09:37:14,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c581832/0e6e977bae554f599ba5b07cdef17102/FLAG705ff1c3d [2020-12-22 09:37:14,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c581832/0e6e977bae554f599ba5b07cdef17102 [2020-12-22 09:37:14,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:37:14,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:37:14,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:14,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:37:14,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:37:14,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:14" (1/1) ... [2020-12-22 09:37:14,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1bb901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:14, skipping insertion in model container [2020-12-22 09:37:14,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:14" (1/1) ... [2020-12-22 09:37:14,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:37:15,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:37:15,464 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.3.ufo.UNBOUNDED.pals+Problem12_label00.c[6508,6521] [2020-12-22 09:37:15,546 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.3.ufo.UNBOUNDED.pals+Problem12_label00.c[8140,8153] [2020-12-22 09:37:16,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:16,824 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:37:16,858 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.3.ufo.UNBOUNDED.pals+Problem12_label00.c[6508,6521] [2020-12-22 09:37:16,864 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.3.ufo.UNBOUNDED.pals+Problem12_label00.c[8140,8153] [2020-12-22 09:37:17,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:17,564 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:37:17,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17 WrapperNode [2020-12-22 09:37:17,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:17,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:17,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:37:17,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:37:17,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:17,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:18,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:37:18,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:37:18,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:37:18,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:37:18,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:37:18,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:37:18,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:37:18,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (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 09:37:18,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:37:18,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:37:18,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:37:18,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:37:24,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:37:24,264 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:37:24,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:24 BoogieIcfgContainer [2020-12-22 09:37:24,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:37:24,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:37:24,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:37:24,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:37:24,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:37:14" (1/3) ... [2020-12-22 09:37:24,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558d0350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:24, skipping insertion in model container [2020-12-22 09:37:24,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (2/3) ... [2020-12-22 09:37:24,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558d0350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:24, skipping insertion in model container [2020-12-22 09:37:24,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:24" (3/3) ... [2020-12-22 09:37:24,277 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 09:37:24,284 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:37:24,291 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:37:24,311 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:37:24,348 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:37:24,348 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:37:24,349 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:37:24,349 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:37:24,349 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:37:24,349 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:37:24,349 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:37:24,349 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:37:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states. [2020-12-22 09:37:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 09:37:24,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:24,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:24,396 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash -755442571, now seen corresponding path program 1 times [2020-12-22 09:37:24,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:24,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003037556] [2020-12-22 09:37:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003037556] [2020-12-22 09:37:24,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:24,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:37:24,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442363528] [2020-12-22 09:37:24,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:24,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:24,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:24,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:24,711 INFO L87 Difference]: Start difference. First operand 879 states. Second operand 3 states. [2020-12-22 09:37:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:30,968 INFO L93 Difference]: Finished difference Result 2489 states and 4796 transitions. [2020-12-22 09:37:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:30,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 09:37:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:31,023 INFO L225 Difference]: With dead ends: 2489 [2020-12-22 09:37:31,023 INFO L226 Difference]: Without dead ends: 1564 [2020-12-22 09:37:31,044 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 09:37:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2020-12-22 09:37:31,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2020-12-22 09:37:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-12-22 09:37:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2874 transitions. [2020-12-22 09:37:31,223 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2874 transitions. Word has length 16 [2020-12-22 09:37:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,224 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2874 transitions. [2020-12-22 09:37:31,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2874 transitions. [2020-12-22 09:37:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:37:31,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,228 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] [2020-12-22 09:37:31,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:37:31,229 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2020-12-22 09:37:31,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693414648] [2020-12-22 09:37:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:31,432 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 09:37:31,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693414648] [2020-12-22 09:37:31,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:31,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:31,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109176653] [2020-12-22 09:37:31,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:31,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:31,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:31,438 INFO L87 Difference]: Start difference. First operand 1564 states and 2874 transitions. Second operand 5 states. [2020-12-22 09:37:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:31,540 INFO L93 Difference]: Finished difference Result 1605 states and 2936 transitions. [2020-12-22 09:37:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:31,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:37:31,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:31,552 INFO L225 Difference]: With dead ends: 1605 [2020-12-22 09:37:31,553 INFO L226 Difference]: Without dead ends: 1564 [2020-12-22 09:37:31,555 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 09:37:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2020-12-22 09:37:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2020-12-22 09:37:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-12-22 09:37:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2858 transitions. [2020-12-22 09:37:31,606 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2858 transitions. Word has length 26 [2020-12-22 09:37:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,607 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2858 transitions. [2020-12-22 09:37:31,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2858 transitions. [2020-12-22 09:37:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:31,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,612 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] [2020-12-22 09:37:31,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:37:31,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,615 INFO L82 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2020-12-22 09:37:31,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267579254] [2020-12-22 09:37:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:31,757 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 09:37:31,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267579254] [2020-12-22 09:37:31,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:31,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:31,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309617316] [2020-12-22 09:37:31,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:31,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:31,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:31,766 INFO L87 Difference]: Start difference. First operand 1564 states and 2858 transitions. Second operand 3 states. [2020-12-22 09:37:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:31,810 INFO L93 Difference]: Finished difference Result 1632 states and 2964 transitions. [2020-12-22 09:37:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:31,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:37:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:31,821 INFO L225 Difference]: With dead ends: 1632 [2020-12-22 09:37:31,822 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:37:31,824 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 09:37:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:37:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1593. [2020-12-22 09:37:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2020-12-22 09:37:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2904 transitions. [2020-12-22 09:37:31,881 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2904 transitions. Word has length 41 [2020-12-22 09:37:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,882 INFO L481 AbstractCegarLoop]: Abstraction has 1593 states and 2904 transitions. [2020-12-22 09:37:31,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2904 transitions. [2020-12-22 09:37:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:31,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,889 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] [2020-12-22 09:37:31,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:37:31,890 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,891 INFO L82 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2020-12-22 09:37:31,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42857994] [2020-12-22 09:37:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,019 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 09:37:32,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42857994] [2020-12-22 09:37:32,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:32,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:32,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346625930] [2020-12-22 09:37:32,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:32,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:32,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:32,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:32,023 INFO L87 Difference]: Start difference. First operand 1593 states and 2904 transitions. Second operand 3 states. [2020-12-22 09:37:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:32,068 INFO L93 Difference]: Finished difference Result 1713 states and 3092 transitions. [2020-12-22 09:37:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:32,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:37:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:32,080 INFO L225 Difference]: With dead ends: 1713 [2020-12-22 09:37:32,081 INFO L226 Difference]: Without dead ends: 1647 [2020-12-22 09:37:32,082 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 09:37:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2020-12-22 09:37:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2020-12-22 09:37:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2020-12-22 09:37:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2985 transitions. [2020-12-22 09:37:32,135 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2985 transitions. Word has length 41 [2020-12-22 09:37:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:32,136 INFO L481 AbstractCegarLoop]: Abstraction has 1645 states and 2985 transitions. [2020-12-22 09:37:32,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2985 transitions. [2020-12-22 09:37:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:32,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:32,140 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] [2020-12-22 09:37:32,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:37:32,140 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2020-12-22 09:37:32,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:32,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375985480] [2020-12-22 09:37:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,294 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 09:37:32,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375985480] [2020-12-22 09:37:32,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:32,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:32,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083993408] [2020-12-22 09:37:32,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:32,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:32,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:32,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:32,297 INFO L87 Difference]: Start difference. First operand 1645 states and 2985 transitions. Second operand 5 states. [2020-12-22 09:37:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:32,476 INFO L93 Difference]: Finished difference Result 2353 states and 4095 transitions. [2020-12-22 09:37:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:37:32,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:37:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:32,493 INFO L225 Difference]: With dead ends: 2353 [2020-12-22 09:37:32,493 INFO L226 Difference]: Without dead ends: 2235 [2020-12-22 09:37:32,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-12-22 09:37:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1761. [2020-12-22 09:37:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 09:37:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3161 transitions. [2020-12-22 09:37:32,568 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3161 transitions. Word has length 41 [2020-12-22 09:37:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:32,568 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 3161 transitions. [2020-12-22 09:37:32,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3161 transitions. [2020-12-22 09:37:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:32,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:32,569 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] [2020-12-22 09:37:32,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:37:32,570 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:32,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2020-12-22 09:37:32,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:32,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349612360] [2020-12-22 09:37:32,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,641 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 09:37:32,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349612360] [2020-12-22 09:37:32,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:32,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:32,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838370459] [2020-12-22 09:37:32,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:32,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:32,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:32,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:32,645 INFO L87 Difference]: Start difference. First operand 1761 states and 3161 transitions. Second operand 3 states. [2020-12-22 09:37:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:32,723 INFO L93 Difference]: Finished difference Result 2185 states and 3807 transitions. [2020-12-22 09:37:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:32,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:32,738 INFO L225 Difference]: With dead ends: 2185 [2020-12-22 09:37:32,739 INFO L226 Difference]: Without dead ends: 1951 [2020-12-22 09:37:32,741 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 09:37:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2020-12-22 09:37:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1941. [2020-12-22 09:37:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-12-22 09:37:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3417 transitions. [2020-12-22 09:37:32,830 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3417 transitions. Word has length 43 [2020-12-22 09:37:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:32,831 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 3417 transitions. [2020-12-22 09:37:32,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3417 transitions. [2020-12-22 09:37:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:32,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:32,832 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] [2020-12-22 09:37:32,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:37:32,838 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:32,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2020-12-22 09:37:32,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:32,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152318122] [2020-12-22 09:37:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,983 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 09:37:32,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152318122] [2020-12-22 09:37:32,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:32,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:32,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279541738] [2020-12-22 09:37:32,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:32,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:32,991 INFO L87 Difference]: Start difference. First operand 1941 states and 3417 transitions. Second operand 5 states. [2020-12-22 09:37:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:33,118 INFO L93 Difference]: Finished difference Result 2357 states and 4035 transitions. [2020-12-22 09:37:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:33,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:37:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:33,131 INFO L225 Difference]: With dead ends: 2357 [2020-12-22 09:37:33,131 INFO L226 Difference]: Without dead ends: 1943 [2020-12-22 09:37:33,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:37:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2020-12-22 09:37:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1941. [2020-12-22 09:37:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-12-22 09:37:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3409 transitions. [2020-12-22 09:37:33,209 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3409 transitions. Word has length 43 [2020-12-22 09:37:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:33,211 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 3409 transitions. [2020-12-22 09:37:33,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3409 transitions. [2020-12-22 09:37:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:37:33,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:33,213 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] [2020-12-22 09:37:33,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:37:33,214 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2020-12-22 09:37:33,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:33,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562257461] [2020-12-22 09:37:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:33,372 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 09:37:33,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562257461] [2020-12-22 09:37:33,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:33,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:37:33,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170057721] [2020-12-22 09:37:33,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:37:33,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:37:33,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:33,377 INFO L87 Difference]: Start difference. First operand 1941 states and 3409 transitions. Second operand 8 states. [2020-12-22 09:37:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:33,644 INFO L93 Difference]: Finished difference Result 2267 states and 3873 transitions. [2020-12-22 09:37:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:37:33,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:37:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:33,660 INFO L225 Difference]: With dead ends: 2267 [2020-12-22 09:37:33,661 INFO L226 Difference]: Without dead ends: 2265 [2020-12-22 09:37:33,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:37:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-12-22 09:37:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1965. [2020-12-22 09:37:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1965 states. [2020-12-22 09:37:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 3429 transitions. [2020-12-22 09:37:33,748 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 3429 transitions. Word has length 44 [2020-12-22 09:37:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:33,749 INFO L481 AbstractCegarLoop]: Abstraction has 1965 states and 3429 transitions. [2020-12-22 09:37:33,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:37:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 3429 transitions. [2020-12-22 09:37:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 09:37:33,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:33,750 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] [2020-12-22 09:37:33,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:37:33,750 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:33,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2020-12-22 09:37:33,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:33,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624248412] [2020-12-22 09:37:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:33,820 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 09:37:33,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624248412] [2020-12-22 09:37:33,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:33,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:33,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090886191] [2020-12-22 09:37:33,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:33,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:33,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:33,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:33,825 INFO L87 Difference]: Start difference. First operand 1965 states and 3429 transitions. Second operand 3 states. [2020-12-22 09:37:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:33,909 INFO L93 Difference]: Finished difference Result 2420 states and 4091 transitions. [2020-12-22 09:37:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:33,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 09:37:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:33,925 INFO L225 Difference]: With dead ends: 2420 [2020-12-22 09:37:33,925 INFO L226 Difference]: Without dead ends: 2161 [2020-12-22 09:37:33,927 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 09:37:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2020-12-22 09:37:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2159. [2020-12-22 09:37:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:37:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3699 transitions. [2020-12-22 09:37:34,052 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3699 transitions. Word has length 45 [2020-12-22 09:37:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:34,053 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3699 transitions. [2020-12-22 09:37:34,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3699 transitions. [2020-12-22 09:37:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:37:34,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:34,055 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] [2020-12-22 09:37:34,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:37:34,055 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1836022441, now seen corresponding path program 1 times [2020-12-22 09:37:34,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:34,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430663145] [2020-12-22 09:37:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:37:34,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430663145] [2020-12-22 09:37:34,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:34,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:34,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846380473] [2020-12-22 09:37:34,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:34,166 INFO L87 Difference]: Start difference. First operand 2159 states and 3699 transitions. Second operand 5 states. [2020-12-22 09:37:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:34,415 INFO L93 Difference]: Finished difference Result 4187 states and 6575 transitions. [2020-12-22 09:37:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:34,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:37:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:34,436 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:37:34,437 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:37:34,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:37:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:37:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:37:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4583 transitions. [2020-12-22 09:37:34,597 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4583 transitions. Word has length 63 [2020-12-22 09:37:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:34,598 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4583 transitions. [2020-12-22 09:37:34,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4583 transitions. [2020-12-22 09:37:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:37:34,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:34,599 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] [2020-12-22 09:37:34,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:37:34,600 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:34,600 INFO L82 PathProgramCache]: Analyzing trace with hash 67239625, now seen corresponding path program 1 times [2020-12-22 09:37:34,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:34,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590473492] [2020-12-22 09:37:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:37:34,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590473492] [2020-12-22 09:37:34,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:34,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:34,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913009359] [2020-12-22 09:37:34,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:34,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:34,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:34,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:34,712 INFO L87 Difference]: Start difference. First operand 2787 states and 4583 transitions. Second operand 5 states. [2020-12-22 09:37:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:35,054 INFO L93 Difference]: Finished difference Result 4815 states and 7459 transitions. [2020-12-22 09:37:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:35,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:37:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:35,079 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:37:35,080 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:37:35,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:37:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:37:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:37:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5899 transitions. [2020-12-22 09:37:35,307 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5899 transitions. Word has length 63 [2020-12-22 09:37:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:35,307 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5899 transitions. [2020-12-22 09:37:35,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5899 transitions. [2020-12-22 09:37:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:35,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:35,309 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:35,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:37:35,309 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:35,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:35,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2131767521, now seen corresponding path program 1 times [2020-12-22 09:37:35,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:35,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139071695] [2020-12-22 09:37:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:35,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139071695] [2020-12-22 09:37:35,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:35,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:35,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335924637] [2020-12-22 09:37:35,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:35,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:35,363 INFO L87 Difference]: Start difference. First operand 3731 states and 5899 transitions. Second operand 3 states. [2020-12-22 09:37:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:35,519 INFO L93 Difference]: Finished difference Result 5324 states and 8166 transitions. [2020-12-22 09:37:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:35,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:37:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:35,542 INFO L225 Difference]: With dead ends: 5324 [2020-12-22 09:37:35,543 INFO L226 Difference]: Without dead ends: 3122 [2020-12-22 09:37:35,548 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 09:37:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2020-12-22 09:37:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 3120. [2020-12-22 09:37:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3120 states. [2020-12-22 09:37:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 5039 transitions. [2020-12-22 09:37:35,719 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 5039 transitions. Word has length 65 [2020-12-22 09:37:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:35,720 INFO L481 AbstractCegarLoop]: Abstraction has 3120 states and 5039 transitions. [2020-12-22 09:37:35,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 5039 transitions. [2020-12-22 09:37:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:35,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:35,722 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:35,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:37:35,722 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:35,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1187468114, now seen corresponding path program 1 times [2020-12-22 09:37:35,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:35,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133616271] [2020-12-22 09:37:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:35,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133616271] [2020-12-22 09:37:35,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:35,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:35,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49766593] [2020-12-22 09:37:35,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:35,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:35,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:35,802 INFO L87 Difference]: Start difference. First operand 3120 states and 5039 transitions. Second operand 5 states. [2020-12-22 09:37:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:36,106 INFO L93 Difference]: Finished difference Result 4472 states and 6963 transitions. [2020-12-22 09:37:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:36,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 09:37:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:36,121 INFO L225 Difference]: With dead ends: 4472 [2020-12-22 09:37:36,121 INFO L226 Difference]: Without dead ends: 4022 [2020-12-22 09:37:36,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2020-12-22 09:37:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3568. [2020-12-22 09:37:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3568 states. [2020-12-22 09:37:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 5671 transitions. [2020-12-22 09:37:36,334 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 5671 transitions. Word has length 65 [2020-12-22 09:37:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:36,335 INFO L481 AbstractCegarLoop]: Abstraction has 3568 states and 5671 transitions. [2020-12-22 09:37:36,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 5671 transitions. [2020-12-22 09:37:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:36,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:36,343 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:36,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:37:36,343 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:36,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1662229482, now seen corresponding path program 1 times [2020-12-22 09:37:36,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:36,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150683729] [2020-12-22 09:37:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:36,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150683729] [2020-12-22 09:37:36,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550547018] [2020-12-22 09:37:36,612 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 09:37:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:36,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:37:36,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:37,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:37,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:37:37,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364635004] [2020-12-22 09:37:37,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:37:37,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:37,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:37:37,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:37:37,077 INFO L87 Difference]: Start difference. First operand 3568 states and 5671 transitions. Second operand 12 states. [2020-12-22 09:37:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:40,444 INFO L93 Difference]: Finished difference Result 12862 states and 18427 transitions. [2020-12-22 09:37:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 09:37:40,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-22 09:37:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:40,475 INFO L225 Difference]: With dead ends: 12862 [2020-12-22 09:37:40,475 INFO L226 Difference]: Without dead ends: 10844 [2020-12-22 09:37:40,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:37:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10844 states. [2020-12-22 09:37:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10844 to 7580. [2020-12-22 09:37:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7580 states. [2020-12-22 09:37:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7580 states to 7580 states and 10948 transitions. [2020-12-22 09:37:41,331 INFO L78 Accepts]: Start accepts. Automaton has 7580 states and 10948 transitions. Word has length 66 [2020-12-22 09:37:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:41,332 INFO L481 AbstractCegarLoop]: Abstraction has 7580 states and 10948 transitions. [2020-12-22 09:37:41,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:37:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 7580 states and 10948 transitions. [2020-12-22 09:37:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:37:41,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:41,334 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:41,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 09:37:41,548 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash -44763738, now seen corresponding path program 1 times [2020-12-22 09:37:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:41,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217053676] [2020-12-22 09:37:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:41,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217053676] [2020-12-22 09:37:41,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075919889] [2020-12-22 09:37:41,825 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 09:37:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:41,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:37:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:42,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:42,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:42,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:42,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633439572] [2020-12-22 09:37:42,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:42,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:42,365 INFO L87 Difference]: Start difference. First operand 7580 states and 10948 transitions. Second operand 17 states. [2020-12-22 09:37:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:46,262 INFO L93 Difference]: Finished difference Result 31451 states and 43006 transitions. [2020-12-22 09:37:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:37:46,263 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:37:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:46,332 INFO L225 Difference]: With dead ends: 31451 [2020-12-22 09:37:46,332 INFO L226 Difference]: Without dead ends: 26540 [2020-12-22 09:37:46,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:37:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26540 states. [2020-12-22 09:37:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26540 to 15253. [2020-12-22 09:37:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15253 states. [2020-12-22 09:37:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15253 states to 15253 states and 21234 transitions. [2020-12-22 09:37:47,989 INFO L78 Accepts]: Start accepts. Automaton has 15253 states and 21234 transitions. Word has length 67 [2020-12-22 09:37:47,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:47,989 INFO L481 AbstractCegarLoop]: Abstraction has 15253 states and 21234 transitions. [2020-12-22 09:37:47,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 15253 states and 21234 transitions. [2020-12-22 09:37:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:37:47,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:47,992 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:37:48,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:37:48,208 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2066736808, now seen corresponding path program 1 times [2020-12-22 09:37:48,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:48,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028003490] [2020-12-22 09:37:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028003490] [2020-12-22 09:37:48,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809828207] [2020-12-22 09:37:48,416 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 09:37:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:48,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:37:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:48,678 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:48,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:48,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:48,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124194092] [2020-12-22 09:37:48,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:48,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:48,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:48,992 INFO L87 Difference]: Start difference. First operand 15253 states and 21234 transitions. Second operand 17 states. [2020-12-22 09:37:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:55,721 INFO L93 Difference]: Finished difference Result 76692 states and 103890 transitions. [2020-12-22 09:37:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:37:55,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:37:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:55,866 INFO L225 Difference]: With dead ends: 76692 [2020-12-22 09:37:55,867 INFO L226 Difference]: Without dead ends: 65262 [2020-12-22 09:37:55,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=591, Invalid=1665, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:37:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65262 states. [2020-12-22 09:37:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65262 to 33304. [2020-12-22 09:37:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33304 states. [2020-12-22 09:37:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33304 states to 33304 states and 45502 transitions. [2020-12-22 09:37:59,720 INFO L78 Accepts]: Start accepts. Automaton has 33304 states and 45502 transitions. Word has length 67 [2020-12-22 09:37:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:59,721 INFO L481 AbstractCegarLoop]: Abstraction has 33304 states and 45502 transitions. [2020-12-22 09:37:59,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 33304 states and 45502 transitions. [2020-12-22 09:37:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:37:59,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:59,724 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] [2020-12-22 09:37:59,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:37:59,939 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash -848751410, now seen corresponding path program 1 times [2020-12-22 09:37:59,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:59,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762246466] [2020-12-22 09:37:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:59,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762246466] [2020-12-22 09:37:59,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:59,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:59,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896701448] [2020-12-22 09:37:59,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:59,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:59,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:59,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:59,996 INFO L87 Difference]: Start difference. First operand 33304 states and 45502 transitions. Second operand 3 states. [2020-12-22 09:38:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:01,382 INFO L93 Difference]: Finished difference Result 48522 states and 66111 transitions. [2020-12-22 09:38:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:01,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:38:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:01,426 INFO L225 Difference]: With dead ends: 48522 [2020-12-22 09:38:01,427 INFO L226 Difference]: Without dead ends: 20010 [2020-12-22 09:38:01,470 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 09:38:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2020-12-22 09:38:03,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19774. [2020-12-22 09:38:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19774 states. [2020-12-22 09:38:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 26664 transitions. [2020-12-22 09:38:03,316 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 26664 transitions. Word has length 67 [2020-12-22 09:38:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:03,316 INFO L481 AbstractCegarLoop]: Abstraction has 19774 states and 26664 transitions. [2020-12-22 09:38:03,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 26664 transitions. [2020-12-22 09:38:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:03,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:03,319 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] [2020-12-22 09:38:03,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:38:03,319 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2096259026, now seen corresponding path program 1 times [2020-12-22 09:38:03,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:03,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066846662] [2020-12-22 09:38:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:03,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066846662] [2020-12-22 09:38:03,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:03,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:03,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383365184] [2020-12-22 09:38:03,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:03,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:03,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:03,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:03,377 INFO L87 Difference]: Start difference. First operand 19774 states and 26664 transitions. Second operand 3 states. [2020-12-22 09:38:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:04,528 INFO L93 Difference]: Finished difference Result 29676 states and 39795 transitions. [2020-12-22 09:38:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:04,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:38:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:04,557 INFO L225 Difference]: With dead ends: 29676 [2020-12-22 09:38:04,557 INFO L226 Difference]: Without dead ends: 13664 [2020-12-22 09:38:04,573 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 09:38:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13664 states. [2020-12-22 09:38:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13664 to 13662. [2020-12-22 09:38:05,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13662 states. [2020-12-22 09:38:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 18287 transitions. [2020-12-22 09:38:05,639 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 18287 transitions. Word has length 67 [2020-12-22 09:38:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:05,639 INFO L481 AbstractCegarLoop]: Abstraction has 13662 states and 18287 transitions. [2020-12-22 09:38:05,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 18287 transitions. [2020-12-22 09:38:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:05,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:05,641 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:05,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:38:05,642 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:05,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:05,642 INFO L82 PathProgramCache]: Analyzing trace with hash 873869654, now seen corresponding path program 1 times [2020-12-22 09:38:05,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:05,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937954830] [2020-12-22 09:38:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:38:05,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937954830] [2020-12-22 09:38:05,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:05,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:05,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329188861] [2020-12-22 09:38:05,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:05,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:05,713 INFO L87 Difference]: Start difference. First operand 13662 states and 18287 transitions. Second operand 6 states. [2020-12-22 09:38:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:06,632 INFO L93 Difference]: Finished difference Result 23425 states and 30839 transitions. [2020-12-22 09:38:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:06,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:38:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:06,653 INFO L225 Difference]: With dead ends: 23425 [2020-12-22 09:38:06,653 INFO L226 Difference]: Without dead ends: 11373 [2020-12-22 09:38:06,663 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 09:38:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2020-12-22 09:38:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 11373. [2020-12-22 09:38:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11373 states. [2020-12-22 09:38:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11373 states to 11373 states and 15168 transitions. [2020-12-22 09:38:07,628 INFO L78 Accepts]: Start accepts. Automaton has 11373 states and 15168 transitions. Word has length 67 [2020-12-22 09:38:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:07,629 INFO L481 AbstractCegarLoop]: Abstraction has 11373 states and 15168 transitions. [2020-12-22 09:38:07,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 11373 states and 15168 transitions. [2020-12-22 09:38:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:07,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:07,631 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:07,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:38:07,632 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:07,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:07,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1198871190, now seen corresponding path program 1 times [2020-12-22 09:38:07,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:07,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837998415] [2020-12-22 09:38:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:38:07,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837998415] [2020-12-22 09:38:07,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:07,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:07,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155969284] [2020-12-22 09:38:07,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:07,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:07,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:07,699 INFO L87 Difference]: Start difference. First operand 11373 states and 15168 transitions. Second operand 6 states. [2020-12-22 09:38:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:08,558 INFO L93 Difference]: Finished difference Result 18542 states and 24231 transitions. [2020-12-22 09:38:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:08,559 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:38:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:08,570 INFO L225 Difference]: With dead ends: 18542 [2020-12-22 09:38:08,570 INFO L226 Difference]: Without dead ends: 8813 [2020-12-22 09:38:08,579 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 09:38:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2020-12-22 09:38:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 8813. [2020-12-22 09:38:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8813 states. [2020-12-22 09:38:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 11820 transitions. [2020-12-22 09:38:09,383 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 11820 transitions. Word has length 67 [2020-12-22 09:38:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:09,383 INFO L481 AbstractCegarLoop]: Abstraction has 8813 states and 11820 transitions. [2020-12-22 09:38:09,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 11820 transitions. [2020-12-22 09:38:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:09,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:09,385 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:09,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:38:09,385 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash -49807498, now seen corresponding path program 1 times [2020-12-22 09:38:09,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:09,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186133970] [2020-12-22 09:38:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:38:09,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186133970] [2020-12-22 09:38:09,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:09,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:09,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128801294] [2020-12-22 09:38:09,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:09,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:09,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:09,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:09,467 INFO L87 Difference]: Start difference. First operand 8813 states and 11820 transitions. Second operand 6 states. [2020-12-22 09:38:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:10,509 INFO L93 Difference]: Finished difference Result 14363 states and 18765 transitions. [2020-12-22 09:38:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:10,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:38:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:10,522 INFO L225 Difference]: With dead ends: 14363 [2020-12-22 09:38:10,522 INFO L226 Difference]: Without dead ends: 7116 [2020-12-22 09:38:10,530 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 09:38:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7116 states. [2020-12-22 09:38:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7116 to 7116. [2020-12-22 09:38:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7116 states. [2020-12-22 09:38:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 9674 transitions. [2020-12-22 09:38:11,066 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 9674 transitions. Word has length 67 [2020-12-22 09:38:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:11,066 INFO L481 AbstractCegarLoop]: Abstraction has 7116 states and 9674 transitions. [2020-12-22 09:38:11,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 9674 transitions. [2020-12-22 09:38:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:38:11,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:11,068 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:11,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:38:11,068 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1937529655, now seen corresponding path program 1 times [2020-12-22 09:38:11,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:11,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755594009] [2020-12-22 09:38:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:11,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755594009] [2020-12-22 09:38:11,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845680817] [2020-12-22 09:38:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:11,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:38:11,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:12,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:38:12,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:12,473 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:12,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:13,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:13,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:38:13,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371657665] [2020-12-22 09:38:13,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:38:13,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:38:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:38:13,026 INFO L87 Difference]: Start difference. First operand 7116 states and 9674 transitions. Second operand 26 states. [2020-12-22 09:38:13,913 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-12-22 09:38:14,164 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-22 09:38:14,386 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 09:38:14,605 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:38:14,831 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:38:15,055 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:38:15,288 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-12-22 09:38:15,539 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:38:15,725 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:38:16,033 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 09:38:17,777 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:38:18,299 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 09:38:18,924 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-12-22 09:38:19,279 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:38:19,541 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-12-22 09:38:19,740 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-12-22 09:38:19,985 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 09:38:20,213 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:38:20,395 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-12-22 09:38:20,768 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:38:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:22,954 INFO L93 Difference]: Finished difference Result 13247 states and 17367 transitions. [2020-12-22 09:38:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:38:22,956 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-12-22 09:38:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:22,971 INFO L225 Difference]: With dead ends: 13247 [2020-12-22 09:38:22,971 INFO L226 Difference]: Without dead ends: 10342 [2020-12-22 09:38:22,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1297, Invalid=6359, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:38:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2020-12-22 09:38:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 6278. [2020-12-22 09:38:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:38:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 8693 transitions. [2020-12-22 09:38:23,565 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 8693 transitions. Word has length 68 [2020-12-22 09:38:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:23,566 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 8693 transitions. [2020-12-22 09:38:23,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:38:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 8693 transitions. [2020-12-22 09:38:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:38:23,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:23,567 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:38:23,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:23,769 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:23,770 INFO L82 PathProgramCache]: Analyzing trace with hash 75217277, now seen corresponding path program 1 times [2020-12-22 09:38:23,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:23,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670211331] [2020-12-22 09:38:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:24,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670211331] [2020-12-22 09:38:24,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824506486] [2020-12-22 09:38:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:24,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:38:24,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:26,559 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:38:26,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:38:26,562 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:38:27,108 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44