/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.BOUNDED-6.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:37:06,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:37:06,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:37:06,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:37:06,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:37:06,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:37:06,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:37:06,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:37:06,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:37:06,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:37:06,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:37:06,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:37:06,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:37:06,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:37:06,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:37:06,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:37:06,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:37:06,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:37:06,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:37:06,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:37:06,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:37:06,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:37:06,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:37:06,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:37:06,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:37:06,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:37:06,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:37:06,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:37:06,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:37:06,916 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:37:06,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:37:06,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:37:06,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:37:06,920 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:37:06,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:37:06,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:37:06,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:37:06,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:37:06,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:37:06,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:37:06,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:37:06,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:37:06,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:37:06,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:37:06,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:37:06,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:37:06,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:37:06,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:37:06,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:37:06,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:37:06,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:37:06,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:37:06,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:37:06,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:37:06,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:37:07,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:37:07,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:37:07,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:37:07,369 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:37:07,370 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:37:07,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c [2020-12-22 09:37:07,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4876125a1/34d0ca60146b4da7ae39e0bfe40117fb/FLAG00e15a55a [2020-12-22 09:37:08,650 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:37:08,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c [2020-12-22 09:37:08,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4876125a1/34d0ca60146b4da7ae39e0bfe40117fb/FLAG00e15a55a [2020-12-22 09:37:09,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4876125a1/34d0ca60146b4da7ae39e0bfe40117fb [2020-12-22 09:37:09,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:37:09,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:37:09,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:09,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:37:09,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:37:09,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:09" (1/1) ... [2020-12-22 09:37:09,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b74dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:09, skipping insertion in model container [2020-12-22 09:37:09,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:09" (1/1) ... [2020-12-22 09:37:09,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:37:09,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:37:09,592 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.BOUNDED-6.pals+Problem12_label06.c[6412,6425] [2020-12-22 09:37:09,644 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.BOUNDED-6.pals+Problem12_label06.c[8986,8999] [2020-12-22 09:37:10,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:10,829 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:37:10,893 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.BOUNDED-6.pals+Problem12_label06.c[6412,6425] [2020-12-22 09:37:10,902 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.BOUNDED-6.pals+Problem12_label06.c[8986,8999] [2020-12-22 09:37:11,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:11,755 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:37:11,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11 WrapperNode [2020-12-22 09:37:11,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:11,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:11,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:37:11,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:37:11,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (1/1) ... [2020-12-22 09:37:11,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (1/1) ... [2020-12-22 09:37:12,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:12,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:37:12,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:37:12,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:37:12,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (1/1) ... [2020-12-22 09:37:12,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (1/1) ... [2020-12-22 09:37:12,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (1/1) ... [2020-12-22 09:37:12,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (1/1) ... [2020-12-22 09:37:12,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (1/1) ... [2020-12-22 09:37:12,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (1/1) ... [2020-12-22 09:37:12,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (1/1) ... [2020-12-22 09:37:13,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:37:13,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:37:13,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:37:13,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:37:13,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (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 09:37:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:37:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:37:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:37:13,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:37:18,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:37:18,971 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 09:37:18,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:18 BoogieIcfgContainer [2020-12-22 09:37:18,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:37:18,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:37:18,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:37:18,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:37:18,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:37:09" (1/3) ... [2020-12-22 09:37:18,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54017ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:18, skipping insertion in model container [2020-12-22 09:37:18,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:11" (2/3) ... [2020-12-22 09:37:18,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54017ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:18, skipping insertion in model container [2020-12-22 09:37:18,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:18" (3/3) ... [2020-12-22 09:37:18,986 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c [2020-12-22 09:37:18,993 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:37:19,000 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:37:19,022 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:37:19,059 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:37:19,059 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:37:19,059 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:37:19,059 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:37:19,060 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:37:19,060 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:37:19,060 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:37:19,060 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:37:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states. [2020-12-22 09:37:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 09:37:19,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:19,107 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] [2020-12-22 09:37:19,108 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash 246970709, now seen corresponding path program 1 times [2020-12-22 09:37:19,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:19,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650437825] [2020-12-22 09:37:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:19,531 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 09:37:19,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650437825] [2020-12-22 09:37:19,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:19,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:37:19,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419407421] [2020-12-22 09:37:19,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:19,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:19,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:19,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:19,571 INFO L87 Difference]: Start difference. First operand 878 states. Second operand 3 states. [2020-12-22 09:37:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:26,286 INFO L93 Difference]: Finished difference Result 2489 states and 4794 transitions. [2020-12-22 09:37:26,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:26,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 09:37:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:26,340 INFO L225 Difference]: With dead ends: 2489 [2020-12-22 09:37:26,340 INFO L226 Difference]: Without dead ends: 1563 [2020-12-22 09:37:26,359 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 09:37:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2020-12-22 09:37:26,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2020-12-22 09:37:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2020-12-22 09:37:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2872 transitions. [2020-12-22 09:37:26,525 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2872 transitions. Word has length 24 [2020-12-22 09:37:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:26,526 INFO L481 AbstractCegarLoop]: Abstraction has 1563 states and 2872 transitions. [2020-12-22 09:37:26,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2872 transitions. [2020-12-22 09:37:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:37:26,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:26,530 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 09:37:26,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:37:26,532 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:26,533 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:37:26,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:26,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997203280] [2020-12-22 09:37:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:26,627 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 09:37:26,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997203280] [2020-12-22 09:37:26,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:26,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:26,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232830104] [2020-12-22 09:37:26,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:26,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:26,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:26,633 INFO L87 Difference]: Start difference. First operand 1563 states and 2872 transitions. Second operand 5 states. [2020-12-22 09:37:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:26,750 INFO L93 Difference]: Finished difference Result 1639 states and 2988 transitions. [2020-12-22 09:37:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:37:26,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:37:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:26,763 INFO L225 Difference]: With dead ends: 1639 [2020-12-22 09:37:26,763 INFO L226 Difference]: Without dead ends: 1599 [2020-12-22 09:37:26,766 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 09:37:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2020-12-22 09:37:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1563. [2020-12-22 09:37:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2020-12-22 09:37:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2856 transitions. [2020-12-22 09:37:26,826 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2856 transitions. Word has length 26 [2020-12-22 09:37:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:26,827 INFO L481 AbstractCegarLoop]: Abstraction has 1563 states and 2856 transitions. [2020-12-22 09:37:26,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2856 transitions. [2020-12-22 09:37:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:26,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:26,830 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 09:37:26,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:37:26,830 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:37:26,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:26,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599899740] [2020-12-22 09:37:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:27,014 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 09:37:27,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599899740] [2020-12-22 09:37:27,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:27,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465725839] [2020-12-22 09:37:27,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:27,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:27,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:27,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:27,027 INFO L87 Difference]: Start difference. First operand 1563 states and 2856 transitions. Second operand 3 states. [2020-12-22 09:37:27,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:27,084 INFO L93 Difference]: Finished difference Result 1629 states and 2958 transitions. [2020-12-22 09:37:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:27,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:37:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:27,098 INFO L225 Difference]: With dead ends: 1629 [2020-12-22 09:37:27,100 INFO L226 Difference]: Without dead ends: 1593 [2020-12-22 09:37:27,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2020-12-22 09:37:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2020-12-22 09:37:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1591 states. [2020-12-22 09:37:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2900 transitions. [2020-12-22 09:37:27,180 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2900 transitions. Word has length 41 [2020-12-22 09:37:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:27,180 INFO L481 AbstractCegarLoop]: Abstraction has 1591 states and 2900 transitions. [2020-12-22 09:37:27,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2900 transitions. [2020-12-22 09:37:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:27,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:27,186 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 09:37:27,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:37:27,187 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:37:27,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:27,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642596840] [2020-12-22 09:37:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:27,363 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 09:37:27,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642596840] [2020-12-22 09:37:27,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:27,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:27,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852015224] [2020-12-22 09:37:27,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:27,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:27,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:27,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:27,368 INFO L87 Difference]: Start difference. First operand 1591 states and 2900 transitions. Second operand 5 states. [2020-12-22 09:37:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:27,542 INFO L93 Difference]: Finished difference Result 1975 states and 3500 transitions. [2020-12-22 09:37:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:37:27,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:37:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:27,558 INFO L225 Difference]: With dead ends: 1975 [2020-12-22 09:37:27,558 INFO L226 Difference]: Without dead ends: 1911 [2020-12-22 09:37:27,560 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 09:37:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2020-12-22 09:37:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1653. [2020-12-22 09:37:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1653 states. [2020-12-22 09:37:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2995 transitions. [2020-12-22 09:37:27,630 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2995 transitions. Word has length 41 [2020-12-22 09:37:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:27,631 INFO L481 AbstractCegarLoop]: Abstraction has 1653 states and 2995 transitions. [2020-12-22 09:37:27,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2995 transitions. [2020-12-22 09:37:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:27,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:27,640 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 09:37:27,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:37:27,641 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:27,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:37:27,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:27,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978638800] [2020-12-22 09:37:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:27,736 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 09:37:27,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978638800] [2020-12-22 09:37:27,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:27,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:27,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410250440] [2020-12-22 09:37:27,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:27,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:27,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:27,741 INFO L87 Difference]: Start difference. First operand 1653 states and 2995 transitions. Second operand 3 states. [2020-12-22 09:37:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:27,809 INFO L93 Difference]: Finished difference Result 1840 states and 3282 transitions. [2020-12-22 09:37:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:27,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:27,828 INFO L225 Difference]: With dead ends: 1840 [2020-12-22 09:37:27,829 INFO L226 Difference]: Without dead ends: 1714 [2020-12-22 09:37:27,831 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 09:37:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-12-22 09:37:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2020-12-22 09:37:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2020-12-22 09:37:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3083 transitions. [2020-12-22 09:37:27,891 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3083 transitions. Word has length 43 [2020-12-22 09:37:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:27,892 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 3083 transitions. [2020-12-22 09:37:27,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3083 transitions. [2020-12-22 09:37:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:27,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:27,893 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 09:37:27,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:37:27,894 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:27,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:27,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:37:27,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:27,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882907759] [2020-12-22 09:37:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:28,069 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 09:37:28,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882907759] [2020-12-22 09:37:28,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:28,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:28,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106509427] [2020-12-22 09:37:28,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:28,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:28,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:28,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:28,072 INFO L87 Difference]: Start difference. First operand 1712 states and 3083 transitions. Second operand 5 states. [2020-12-22 09:37:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:28,207 INFO L93 Difference]: Finished difference Result 1897 states and 3365 transitions. [2020-12-22 09:37:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:28,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:37:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:28,219 INFO L225 Difference]: With dead ends: 1897 [2020-12-22 09:37:28,220 INFO L226 Difference]: Without dead ends: 1714 [2020-12-22 09:37:28,222 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 09:37:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-12-22 09:37:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2020-12-22 09:37:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2020-12-22 09:37:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3080 transitions. [2020-12-22 09:37:28,278 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3080 transitions. Word has length 43 [2020-12-22 09:37:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:28,278 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 3080 transitions. [2020-12-22 09:37:28,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3080 transitions. [2020-12-22 09:37:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:28,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:28,281 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 09:37:28,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:37:28,286 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:28,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:28,287 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:37:28,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:28,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911692297] [2020-12-22 09:37:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:28,372 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 09:37:28,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911692297] [2020-12-22 09:37:28,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:28,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:28,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456608789] [2020-12-22 09:37:28,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:28,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:28,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:28,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:28,377 INFO L87 Difference]: Start difference. First operand 1712 states and 3080 transitions. Second operand 3 states. [2020-12-22 09:37:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:28,447 INFO L93 Difference]: Finished difference Result 2042 states and 3576 transitions. [2020-12-22 09:37:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:28,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:28,462 INFO L225 Difference]: With dead ends: 2042 [2020-12-22 09:37:28,463 INFO L226 Difference]: Without dead ends: 1859 [2020-12-22 09:37:28,465 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 09:37:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2020-12-22 09:37:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2020-12-22 09:37:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1857 states. [2020-12-22 09:37:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 3291 transitions. [2020-12-22 09:37:28,538 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 3291 transitions. Word has length 43 [2020-12-22 09:37:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:28,539 INFO L481 AbstractCegarLoop]: Abstraction has 1857 states and 3291 transitions. [2020-12-22 09:37:28,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 3291 transitions. [2020-12-22 09:37:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:28,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:28,541 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 09:37:28,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:37:28,541 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:37:28,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:28,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452412619] [2020-12-22 09:37:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:28,592 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 09:37:28,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452412619] [2020-12-22 09:37:28,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:28,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:28,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593991293] [2020-12-22 09:37:28,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:28,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:28,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:28,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:28,595 INFO L87 Difference]: Start difference. First operand 1857 states and 3291 transitions. Second operand 3 states. [2020-12-22 09:37:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:28,670 INFO L93 Difference]: Finished difference Result 2441 states and 4149 transitions. [2020-12-22 09:37:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:28,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:28,684 INFO L225 Difference]: With dead ends: 2441 [2020-12-22 09:37:28,685 INFO L226 Difference]: Without dead ends: 2113 [2020-12-22 09:37:28,687 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 09:37:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2020-12-22 09:37:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2020-12-22 09:37:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2111 states. [2020-12-22 09:37:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3647 transitions. [2020-12-22 09:37:28,776 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3647 transitions. Word has length 43 [2020-12-22 09:37:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:28,776 INFO L481 AbstractCegarLoop]: Abstraction has 2111 states and 3647 transitions. [2020-12-22 09:37:28,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3647 transitions. [2020-12-22 09:37:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:37:28,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:28,777 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 09:37:28,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:37:28,778 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:37:28,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:28,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273868253] [2020-12-22 09:37:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:28,881 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 09:37:28,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273868253] [2020-12-22 09:37:28,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:28,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:28,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863861266] [2020-12-22 09:37:28,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:28,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:28,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:28,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:28,884 INFO L87 Difference]: Start difference. First operand 2111 states and 3647 transitions. Second operand 5 states. [2020-12-22 09:37:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:29,102 INFO L93 Difference]: Finished difference Result 2634 states and 4375 transitions. [2020-12-22 09:37:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:37:29,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 09:37:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:29,118 INFO L225 Difference]: With dead ends: 2634 [2020-12-22 09:37:29,119 INFO L226 Difference]: Without dead ends: 2632 [2020-12-22 09:37:29,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2020-12-22 09:37:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2159. [2020-12-22 09:37:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:37:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3691 transitions. [2020-12-22 09:37:29,240 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3691 transitions. Word has length 44 [2020-12-22 09:37:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:29,246 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3691 transitions. [2020-12-22 09:37:29,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3691 transitions. [2020-12-22 09:37:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:37:29,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:29,248 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] [2020-12-22 09:37:29,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:37:29,249 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:29,250 INFO L82 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2020-12-22 09:37:29,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:29,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486473321] [2020-12-22 09:37:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:29,354 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 09:37:29,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486473321] [2020-12-22 09:37:29,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:29,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:29,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090742240] [2020-12-22 09:37:29,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:29,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:29,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:29,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:29,359 INFO L87 Difference]: Start difference. First operand 2159 states and 3691 transitions. Second operand 5 states. [2020-12-22 09:37:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:29,615 INFO L93 Difference]: Finished difference Result 4187 states and 6539 transitions. [2020-12-22 09:37:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:29,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:37:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:29,635 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:37:29,636 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:37:29,639 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 09:37:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:37:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:37:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:37:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4567 transitions. [2020-12-22 09:37:29,807 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4567 transitions. Word has length 64 [2020-12-22 09:37:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:29,808 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4567 transitions. [2020-12-22 09:37:29,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4567 transitions. [2020-12-22 09:37:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:37:29,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:29,810 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] [2020-12-22 09:37:29,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:37:29,810 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2020-12-22 09:37:29,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:29,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454189451] [2020-12-22 09:37:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:37:29,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454189451] [2020-12-22 09:37:29,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:29,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:29,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296439557] [2020-12-22 09:37:29,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:29,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:29,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:29,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:29,919 INFO L87 Difference]: Start difference. First operand 2787 states and 4567 transitions. Second operand 5 states. [2020-12-22 09:37:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:30,226 INFO L93 Difference]: Finished difference Result 4815 states and 7415 transitions. [2020-12-22 09:37:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:30,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:37:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:30,254 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:37:30,254 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:37:30,258 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 09:37:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:37:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:37:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:37:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5871 transitions. [2020-12-22 09:37:30,533 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5871 transitions. Word has length 64 [2020-12-22 09:37:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:30,533 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5871 transitions. [2020-12-22 09:37:30,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5871 transitions. [2020-12-22 09:37:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:37:30,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:30,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:30,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:37:30,537 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2020-12-22 09:37:30,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:30,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579761232] [2020-12-22 09:37:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:30,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579761232] [2020-12-22 09:37:30,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:30,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:30,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533294880] [2020-12-22 09:37:30,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:30,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:30,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:30,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:30,624 INFO L87 Difference]: Start difference. First operand 3731 states and 5871 transitions. Second operand 5 states. [2020-12-22 09:37:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:30,987 INFO L93 Difference]: Finished difference Result 5083 states and 7795 transitions. [2020-12-22 09:37:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:30,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:37:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:31,003 INFO L225 Difference]: With dead ends: 5083 [2020-12-22 09:37:31,003 INFO L226 Difference]: Without dead ends: 4633 [2020-12-22 09:37:31,007 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 09:37:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2020-12-22 09:37:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2020-12-22 09:37:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:37:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6503 transitions. [2020-12-22 09:37:31,302 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6503 transitions. Word has length 64 [2020-12-22 09:37:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,303 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6503 transitions. [2020-12-22 09:37:31,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6503 transitions. [2020-12-22 09:37:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:31,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,305 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:31,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:37:31,305 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,306 INFO L82 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2020-12-22 09:37:31,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938251009] [2020-12-22 09:37:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:31,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938251009] [2020-12-22 09:37:31,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:31,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:31,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471105757] [2020-12-22 09:37:31,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:31,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:31,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:31,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:31,364 INFO L87 Difference]: Start difference. First operand 4179 states and 6503 transitions. Second operand 3 states. [2020-12-22 09:37:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:31,695 INFO L93 Difference]: Finished difference Result 6831 states and 10205 transitions. [2020-12-22 09:37:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:31,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:37:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:31,707 INFO L225 Difference]: With dead ends: 6831 [2020-12-22 09:37:31,708 INFO L226 Difference]: Without dead ends: 4181 [2020-12-22 09:37:31,712 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 09:37:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2020-12-22 09:37:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2020-12-22 09:37:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:37:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6453 transitions. [2020-12-22 09:37:31,971 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6453 transitions. Word has length 65 [2020-12-22 09:37:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,972 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6453 transitions. [2020-12-22 09:37:31,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6453 transitions. [2020-12-22 09:37:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:31,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:31,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:37:31,974 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,975 INFO L82 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2020-12-22 09:37:31,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59440337] [2020-12-22 09:37:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,028 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 09:37:32,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59440337] [2020-12-22 09:37:32,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:32,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:32,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758843225] [2020-12-22 09:37:32,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:32,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:32,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:32,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:32,031 INFO L87 Difference]: Start difference. First operand 4179 states and 6453 transitions. Second operand 3 states. [2020-12-22 09:37:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:32,181 INFO L93 Difference]: Finished difference Result 5507 states and 8280 transitions. [2020-12-22 09:37:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:32,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:37:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:32,191 INFO L225 Difference]: With dead ends: 5507 [2020-12-22 09:37:32,191 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 09:37:32,196 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 09:37:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 09:37:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2020-12-22 09:37:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2855 states. [2020-12-22 09:37:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4603 transitions. [2020-12-22 09:37:32,369 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4603 transitions. Word has length 65 [2020-12-22 09:37:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:32,369 INFO L481 AbstractCegarLoop]: Abstraction has 2855 states and 4603 transitions. [2020-12-22 09:37:32,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4603 transitions. [2020-12-22 09:37:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:32,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:32,371 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] [2020-12-22 09:37:32,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:37:32,372 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:32,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:32,372 INFO L82 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2020-12-22 09:37:32,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:32,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942324551] [2020-12-22 09:37:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,482 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 09:37:32,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942324551] [2020-12-22 09:37:32,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60738841] [2020-12-22 09:37:32,483 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 09:37:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:37:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:32,894 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 09:37:32,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:32,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2020-12-22 09:37:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547439520] [2020-12-22 09:37:32,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:37:32,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:32,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:37:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:37:32,899 INFO L87 Difference]: Start difference. First operand 2855 states and 4603 transitions. Second operand 10 states. [2020-12-22 09:37:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:33,313 INFO L93 Difference]: Finished difference Result 4704 states and 7140 transitions. [2020-12-22 09:37:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:37:33,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-12-22 09:37:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:33,325 INFO L225 Difference]: With dead ends: 4704 [2020-12-22 09:37:33,326 INFO L226 Difference]: Without dead ends: 3694 [2020-12-22 09:37:33,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:37:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2020-12-22 09:37:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3661. [2020-12-22 09:37:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2020-12-22 09:37:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5659 transitions. [2020-12-22 09:37:33,567 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5659 transitions. Word has length 65 [2020-12-22 09:37:33,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:33,568 INFO L481 AbstractCegarLoop]: Abstraction has 3661 states and 5659 transitions. [2020-12-22 09:37:33,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:37:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5659 transitions. [2020-12-22 09:37:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:33,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:33,570 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] [2020-12-22 09:37:33,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:37:33,786 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:33,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:33,787 INFO L82 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2020-12-22 09:37:33,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:33,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140314923] [2020-12-22 09:37:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:34,152 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 09:37:34,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140314923] [2020-12-22 09:37:34,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404453459] [2020-12-22 09:37:34,153 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 09:37:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:34,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:37:34,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:34,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:35,016 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 09:37:35,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:35,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:35,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273609404] [2020-12-22 09:37:35,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:35,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:35,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:35,020 INFO L87 Difference]: Start difference. First operand 3661 states and 5659 transitions. Second operand 17 states. [2020-12-22 09:37:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:37,293 INFO L93 Difference]: Finished difference Result 10680 states and 14929 transitions. [2020-12-22 09:37:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:37:37,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:37:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:37,317 INFO L225 Difference]: With dead ends: 10680 [2020-12-22 09:37:37,317 INFO L226 Difference]: Without dead ends: 9189 [2020-12-22 09:37:37,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:37:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2020-12-22 09:37:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 6136. [2020-12-22 09:37:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6136 states. [2020-12-22 09:37:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 8937 transitions. [2020-12-22 09:37:38,078 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 8937 transitions. Word has length 66 [2020-12-22 09:37:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:38,078 INFO L481 AbstractCegarLoop]: Abstraction has 6136 states and 8937 transitions. [2020-12-22 09:37:38,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 8937 transitions. [2020-12-22 09:37:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:38,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:38,081 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] [2020-12-22 09:37:38,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:37:38,296 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:38,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2020-12-22 09:37:38,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:38,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104195884] [2020-12-22 09:37:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:38,567 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 09:37:38,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104195884] [2020-12-22 09:37:38,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455604021] [2020-12-22 09:37:38,568 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 09:37:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:38,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:37:38,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:38,906 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:39,278 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 09:37:39,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:39,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:39,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205556123] [2020-12-22 09:37:39,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:39,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:39,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:39,284 INFO L87 Difference]: Start difference. First operand 6136 states and 8937 transitions. Second operand 17 states. [2020-12-22 09:37:42,064 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:37:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:44,244 INFO L93 Difference]: Finished difference Result 29250 states and 39509 transitions. [2020-12-22 09:37:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:37:44,245 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:37:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:44,308 INFO L225 Difference]: With dead ends: 29250 [2020-12-22 09:37:44,308 INFO L226 Difference]: Without dead ends: 24643 [2020-12-22 09:37:44,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:37:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24643 states. [2020-12-22 09:37:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24643 to 11635. [2020-12-22 09:37:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11635 states. [2020-12-22 09:37:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 16064 transitions. [2020-12-22 09:37:45,429 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 16064 transitions. Word has length 66 [2020-12-22 09:37:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:45,430 INFO L481 AbstractCegarLoop]: Abstraction has 11635 states and 16064 transitions. [2020-12-22 09:37:45,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 16064 transitions. [2020-12-22 09:37:45,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:45,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:45,432 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] [2020-12-22 09:37:45,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:37:45,633 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:45,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:45,635 INFO L82 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2020-12-22 09:37:45,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:45,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686289634] [2020-12-22 09:37:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:45,885 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 09:37:45,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686289634] [2020-12-22 09:37:45,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428246951] [2020-12-22 09:37:45,886 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 09:37:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:46,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:37:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:46,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:46,539 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 09:37:46,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:46,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:46,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113044721] [2020-12-22 09:37:46,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:46,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:46,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:46,542 INFO L87 Difference]: Start difference. First operand 11635 states and 16064 transitions. Second operand 17 states. [2020-12-22 09:37:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:51,528 INFO L93 Difference]: Finished difference Result 54429 states and 71400 transitions. [2020-12-22 09:37:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:37:51,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:37:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:51,647 INFO L225 Difference]: With dead ends: 54429 [2020-12-22 09:37:51,647 INFO L226 Difference]: Without dead ends: 44323 [2020-12-22 09:37:51,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:37:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44323 states. [2020-12-22 09:37:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44323 to 29071. [2020-12-22 09:37:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29071 states. [2020-12-22 09:37:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29071 states to 29071 states and 38492 transitions. [2020-12-22 09:37:54,475 INFO L78 Accepts]: Start accepts. Automaton has 29071 states and 38492 transitions. Word has length 66 [2020-12-22 09:37:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:54,476 INFO L481 AbstractCegarLoop]: Abstraction has 29071 states and 38492 transitions. [2020-12-22 09:37:54,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 29071 states and 38492 transitions. [2020-12-22 09:37:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:54,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:54,479 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] [2020-12-22 09:37:54,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:37:54,695 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:54,828 INFO L82 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2020-12-22 09:37:54,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:54,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845538996] [2020-12-22 09:37:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:54,909 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 09:37:54,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845538996] [2020-12-22 09:37:54,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:54,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:54,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834156917] [2020-12-22 09:37:54,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:54,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:54,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:54,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:54,913 INFO L87 Difference]: Start difference. First operand 29071 states and 38492 transitions. Second operand 3 states. [2020-12-22 09:37:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:56,025 INFO L93 Difference]: Finished difference Result 41067 states and 54022 transitions. [2020-12-22 09:37:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:56,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:37:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:56,055 INFO L225 Difference]: With dead ends: 41067 [2020-12-22 09:37:56,055 INFO L226 Difference]: Without dead ends: 13525 [2020-12-22 09:37:56,097 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 09:37:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13525 states. [2020-12-22 09:37:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13525 to 12473. [2020-12-22 09:37:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12473 states. [2020-12-22 09:37:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12473 states to 12473 states and 16781 transitions. [2020-12-22 09:37:57,252 INFO L78 Accepts]: Start accepts. Automaton has 12473 states and 16781 transitions. Word has length 66 [2020-12-22 09:37:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:57,252 INFO L481 AbstractCegarLoop]: Abstraction has 12473 states and 16781 transitions. [2020-12-22 09:37:57,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 12473 states and 16781 transitions. [2020-12-22 09:37:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:57,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:57,255 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] [2020-12-22 09:37:57,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:37:57,255 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:57,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2020-12-22 09:37:57,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:57,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442509346] [2020-12-22 09:37:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:57,335 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 09:37:57,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442509346] [2020-12-22 09:37:57,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:57,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:57,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733654167] [2020-12-22 09:37:57,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:37:57,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:57,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:37:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:37:57,342 INFO L87 Difference]: Start difference. First operand 12473 states and 16781 transitions. Second operand 6 states. [2020-12-22 09:37:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:58,332 INFO L93 Difference]: Finished difference Result 21538 states and 28428 transitions. [2020-12-22 09:37:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:37:58,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:37:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:58,354 INFO L225 Difference]: With dead ends: 21538 [2020-12-22 09:37:58,354 INFO L226 Difference]: Without dead ends: 10671 [2020-12-22 09:37:58,368 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 09:37:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10671 states. [2020-12-22 09:37:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10671 to 10671. [2020-12-22 09:37:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10671 states. [2020-12-22 09:37:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10671 states to 10671 states and 14259 transitions. [2020-12-22 09:37:59,862 INFO L78 Accepts]: Start accepts. Automaton has 10671 states and 14259 transitions. Word has length 66 [2020-12-22 09:37:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:59,863 INFO L481 AbstractCegarLoop]: Abstraction has 10671 states and 14259 transitions. [2020-12-22 09:37:59,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:37:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10671 states and 14259 transitions. [2020-12-22 09:37:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:59,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:59,867 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] [2020-12-22 09:37:59,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:37:59,867 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:59,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2020-12-22 09:37:59,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:59,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244564644] [2020-12-22 09:37:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:59,946 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 09:37:59,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244564644] [2020-12-22 09:37:59,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:59,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148225752] [2020-12-22 09:37:59,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:37:59,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:37:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:37:59,949 INFO L87 Difference]: Start difference. First operand 10671 states and 14259 transitions. Second operand 6 states. [2020-12-22 09:38:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:01,300 INFO L93 Difference]: Finished difference Result 17448 states and 22795 transitions. [2020-12-22 09:38:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:01,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:38:01,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:01,313 INFO L225 Difference]: With dead ends: 17448 [2020-12-22 09:38:01,313 INFO L226 Difference]: Without dead ends: 8419 [2020-12-22 09:38:01,323 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 09:38:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2020-12-22 09:38:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 8419. [2020-12-22 09:38:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8419 states. [2020-12-22 09:38:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 11291 transitions. [2020-12-22 09:38:02,301 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 11291 transitions. Word has length 66 [2020-12-22 09:38:02,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:02,301 INFO L481 AbstractCegarLoop]: Abstraction has 8419 states and 11291 transitions. [2020-12-22 09:38:02,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:02,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 11291 transitions. [2020-12-22 09:38:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:38:02,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:02,304 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] [2020-12-22 09:38:02,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:38:02,304 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2020-12-22 09:38:02,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:02,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430870851] [2020-12-22 09:38:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:02,370 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 09:38:02,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430870851] [2020-12-22 09:38:02,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:02,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:02,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149881183] [2020-12-22 09:38:02,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:02,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:02,373 INFO L87 Difference]: Start difference. First operand 8419 states and 11291 transitions. Second operand 6 states. [2020-12-22 09:38:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:03,419 INFO L93 Difference]: Finished difference Result 13769 states and 17948 transitions. [2020-12-22 09:38:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:03,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:38:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:03,430 INFO L225 Difference]: With dead ends: 13769 [2020-12-22 09:38:03,431 INFO L226 Difference]: Without dead ends: 6915 [2020-12-22 09:38:03,438 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 09:38:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2020-12-22 09:38:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 6915. [2020-12-22 09:38:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6915 states. [2020-12-22 09:38:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 9385 transitions. [2020-12-22 09:38:04,213 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 9385 transitions. Word has length 66 [2020-12-22 09:38:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:04,214 INFO L481 AbstractCegarLoop]: Abstraction has 6915 states and 9385 transitions. [2020-12-22 09:38:04,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 9385 transitions. [2020-12-22 09:38:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:04,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:04,216 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 09:38:04,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:38:04,217 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2020-12-22 09:38:04,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:04,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706653445] [2020-12-22 09:38:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:04,838 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 09:38:04,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706653445] [2020-12-22 09:38:04,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675212297] [2020-12-22 09:38:04,839 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 09:38:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:05,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:38:05,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:05,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:38:05,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:05,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:05,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:06,349 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 09:38:06,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:06,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:38:06,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750808988] [2020-12-22 09:38:06,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:38:06,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:38:06,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:38:06,352 INFO L87 Difference]: Start difference. First operand 6915 states and 9385 transitions. Second operand 26 states. [2020-12-22 09:38:07,121 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:38:07,323 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-22 09:38:07,527 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 09:38:07,845 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-12-22 09:38:08,119 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:38:08,387 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:38:08,651 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:38:08,919 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:38:09,228 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 09:38:09,547 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:38:09,777 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:38:09,949 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:38:10,158 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-22 09:38:10,702 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-12-22 09:38:11,142 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:38:11,349 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:38:11,672 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:38:11,986 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 09:38:12,319 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-22 09:38:12,484 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:38:12,931 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 09:38:13,654 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:38:14,114 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:38:14,469 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:38:14,749 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 09:38:15,078 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 09:38:15,330 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:38:15,585 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:38:15,884 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:38:16,079 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:38:16,543 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:38:16,917 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 09:38:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:18,563 INFO L93 Difference]: Finished difference Result 13221 states and 17220 transitions. [2020-12-22 09:38:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:38:18,564 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-12-22 09:38:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:18,578 INFO L225 Difference]: With dead ends: 13221 [2020-12-22 09:38:18,578 INFO L226 Difference]: Without dead ends: 10406 [2020-12-22 09:38:18,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1298, Invalid=6358, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:38:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2020-12-22 09:38:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 6157. [2020-12-22 09:38:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6157 states. [2020-12-22 09:38:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 8500 transitions. [2020-12-22 09:38:19,231 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 8500 transitions. Word has length 67 [2020-12-22 09:38:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:19,232 INFO L481 AbstractCegarLoop]: Abstraction has 6157 states and 8500 transitions. [2020-12-22 09:38:19,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:38:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 8500 transitions. [2020-12-22 09:38:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:19,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:19,233 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 09:38:19,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:38:19,434 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:19,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2020-12-22 09:38:19,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:19,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337654537] [2020-12-22 09:38:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:20,004 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 09:38:20,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337654537] [2020-12-22 09:38:20,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86485585] [2020-12-22 09:38:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:20,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:38:20,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:20,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:38:20,959 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 09:38:20,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:20,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-22 09:38:20,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968469415] [2020-12-22 09:38:20,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:38:20,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:20,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:38:20,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:38:20,962 INFO L87 Difference]: Start difference. First operand 6157 states and 8500 transitions. Second operand 22 states. [2020-12-22 09:38:21,290 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-12-22 09:38:21,470 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:38:21,663 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:38:21,824 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:38:22,620 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-12-22 09:38:22,887 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:38:23,068 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-12-22 09:38:23,319 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 09:38:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:24,100 INFO L93 Difference]: Finished difference Result 9399 states and 12593 transitions. [2020-12-22 09:38:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:38:24,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 09:38:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:24,162 INFO L225 Difference]: With dead ends: 9399 [2020-12-22 09:38:24,162 INFO L226 Difference]: Without dead ends: 7213 [2020-12-22 09:38:24,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:38:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2020-12-22 09:38:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 5165. [2020-12-22 09:38:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5165 states. [2020-12-22 09:38:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 7274 transitions. [2020-12-22 09:38:24,681 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 7274 transitions. Word has length 67 [2020-12-22 09:38:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:24,682 INFO L481 AbstractCegarLoop]: Abstraction has 5165 states and 7274 transitions. [2020-12-22 09:38:24,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:38:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 7274 transitions. [2020-12-22 09:38:24,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:38:24,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:24,683 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, 1] [2020-12-22 09:38:24,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:24,896 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:24,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2020-12-22 09:38:24,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:24,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825146657] [2020-12-22 09:38:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:25,481 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 09:38:25,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825146657] [2020-12-22 09:38:25,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994596501] [2020-12-22 09:38:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:25,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 09:38:25,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:27,541 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 09:38:27,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:27,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 09:38:27,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911470378] [2020-12-22 09:38:27,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 09:38:27,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:27,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 09:38:27,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-12-22 09:38:27,543 INFO L87 Difference]: Start difference. First operand 5165 states and 7274 transitions. Second operand 32 states. [2020-12-22 09:38:28,734 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:38:28,894 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-22 09:38:30,402 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:38:30,764 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 09:38:32,613 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:38:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:33,332 INFO L93 Difference]: Finished difference Result 8559 states and 11575 transitions. [2020-12-22 09:38:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 09:38:33,333 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 09:38:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:33,341 INFO L225 Difference]: With dead ends: 8559 [2020-12-22 09:38:33,341 INFO L226 Difference]: Without dead ends: 6639 [2020-12-22 09:38:33,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1070, Invalid=4042, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 09:38:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2020-12-22 09:38:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 4215. [2020-12-22 09:38:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:38:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 6110 transitions. [2020-12-22 09:38:33,702 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 6110 transitions. Word has length 68 [2020-12-22 09:38:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:33,702 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 6110 transitions. [2020-12-22 09:38:33,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 09:38:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 6110 transitions. [2020-12-22 09:38:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 09:38:33,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:33,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:33,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 09:38:33,908 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -115515643, now seen corresponding path program 1 times [2020-12-22 09:38:33,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:33,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221131490] [2020-12-22 09:38:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:34,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221131490] [2020-12-22 09:38:34,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:34,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:34,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642750812] [2020-12-22 09:38:34,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:38:34,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:38:34,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:38:34,020 INFO L87 Difference]: Start difference. First operand 4215 states and 6110 transitions. Second operand 4 states. [2020-12-22 09:38:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:47,004 INFO L93 Difference]: Finished difference Result 7972 states and 13000 transitions. [2020-12-22 09:38:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:38:47,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-12-22 09:38:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:47,014 INFO L225 Difference]: With dead ends: 7972 [2020-12-22 09:38:47,014 INFO L226 Difference]: Without dead ends: 6468 [2020-12-22 09:38:47,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:47,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2020-12-22 09:38:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 6468. [2020-12-22 09:38:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6468 states. [2020-12-22 09:38:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 9239 transitions. [2020-12-22 09:38:47,512 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 9239 transitions. Word has length 93 [2020-12-22 09:38:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:47,512 INFO L481 AbstractCegarLoop]: Abstraction has 6468 states and 9239 transitions. [2020-12-22 09:38:47,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:38:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 9239 transitions. [2020-12-22 09:38:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:38:47,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:47,514 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:47,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:38:47,514 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:47,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash -346176118, now seen corresponding path program 1 times [2020-12-22 09:38:47,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:47,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636505030] [2020-12-22 09:38:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:47,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636505030] [2020-12-22 09:38:47,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611559636] [2020-12-22 09:38:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:47,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 09:38:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:47,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:38:47,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 09:38:47,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674697730] [2020-12-22 09:38:47,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:47,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:47,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:47,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:47,858 INFO L87 Difference]: Start difference. First operand 6468 states and 9239 transitions. Second operand 3 states. [2020-12-22 09:38:55,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:55,417 INFO L93 Difference]: Finished difference Result 13229 states and 20291 transitions. [2020-12-22 09:38:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:55,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 09:38:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:55,427 INFO L225 Difference]: With dead ends: 13229 [2020-12-22 09:38:55,428 INFO L226 Difference]: Without dead ends: 9472 [2020-12-22 09:38:55,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2020-12-22 09:38:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 9472. [2020-12-22 09:38:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9472 states. [2020-12-22 09:38:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 12963 transitions. [2020-12-22 09:38:55,874 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 12963 transitions. Word has length 95 [2020-12-22 09:38:55,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:55,874 INFO L481 AbstractCegarLoop]: Abstraction has 9472 states and 12963 transitions. [2020-12-22 09:38:55,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 12963 transitions. [2020-12-22 09:38:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 09:38:55,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:55,878 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:56,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:38:56,092 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1538014726, now seen corresponding path program 1 times [2020-12-22 09:38:56,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:56,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430686140] [2020-12-22 09:38:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:56,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430686140] [2020-12-22 09:38:56,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702037327] [2020-12-22 09:38:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 09:38:56,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:57,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:38:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:57,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:57,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-12-22 09:38:57,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712719037] [2020-12-22 09:38:57,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:38:57,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:57,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:38:57,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:38:57,797 INFO L87 Difference]: Start difference. First operand 9472 states and 12963 transitions. Second operand 23 states. [2020-12-22 09:38:58,206 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-22 09:38:58,918 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-12-22 09:38:59,371 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-22 09:38:59,799 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-12-22 09:39:00,221 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-22 09:39:00,768 WARN L197 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:39:01,366 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:39:02,175 WARN L197 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:39:02,826 WARN L197 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:39:03,705 WARN L197 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-12-22 09:39:04,401 WARN L197 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2020-12-22 09:39:05,009 WARN L197 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-12-22 09:39:05,664 WARN L197 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:39:06,283 WARN L197 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-12-22 09:39:07,096 WARN L197 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-12-22 09:39:08,097 WARN L197 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:39:09,041 WARN L197 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:39:10,050 WARN L197 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:39:11,514 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:39:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:12,283 INFO L93 Difference]: Finished difference Result 11846 states and 15950 transitions. [2020-12-22 09:39:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 09:39:12,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-12-22 09:39:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:12,295 INFO L225 Difference]: With dead ends: 11846 [2020-12-22 09:39:12,295 INFO L226 Difference]: Without dead ends: 9690 [2020-12-22 09:39:12,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:39:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9690 states. [2020-12-22 09:39:12,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9690 to 9472. [2020-12-22 09:39:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9472 states. [2020-12-22 09:39:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 12911 transitions. [2020-12-22 09:39:12,858 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 12911 transitions. Word has length 110 [2020-12-22 09:39:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:12,859 INFO L481 AbstractCegarLoop]: Abstraction has 9472 states and 12911 transitions. [2020-12-22 09:39:12,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:39:12,859 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 12911 transitions. [2020-12-22 09:39:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:39:12,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:12,862 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:13,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:39:13,078 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:13,079 INFO L82 PathProgramCache]: Analyzing trace with hash -721276639, now seen corresponding path program 1 times [2020-12-22 09:39:13,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:13,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551917706] [2020-12-22 09:39:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 25 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551917706] [2020-12-22 09:39:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646744780] [2020-12-22 09:39:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:39:13,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:14,217 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:39:14,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:39:15,336 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 34 [2020-12-22 09:39:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:16,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:16,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 29 [2020-12-22 09:39:16,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363086894] [2020-12-22 09:39:16,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:39:16,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:39:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:39:16,213 INFO L87 Difference]: Start difference. First operand 9472 states and 12911 transitions. Second operand 30 states. [2020-12-22 09:39:16,388 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:39:16,829 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:39:17,041 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:39:17,486 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:39:17,723 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:39:18,072 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:39:18,311 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:39:18,604 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-22 09:39:18,921 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-12-22 09:39:19,336 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:39:19,611 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 09:39:19,859 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:39:20,309 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-22 09:39:20,971 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:39:21,477 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:39:21,845 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:39:22,349 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 09:39:22,778 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-22 09:39:22,946 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-12-22 09:39:23,185 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:39:23,439 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:39:23,748 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 09:39:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:24,318 INFO L93 Difference]: Finished difference Result 11564 states and 15502 transitions. [2020-12-22 09:39:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 09:39:24,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 09:39:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:24,333 INFO L225 Difference]: With dead ends: 11564 [2020-12-22 09:39:24,334 INFO L226 Difference]: Without dead ends: 10046 [2020-12-22 09:39:24,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=614, Invalid=2926, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 09:39:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2020-12-22 09:39:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9472. [2020-12-22 09:39:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9472 states. [2020-12-22 09:39:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 12885 transitions. [2020-12-22 09:39:25,004 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 12885 transitions. Word has length 111 [2020-12-22 09:39:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:25,005 INFO L481 AbstractCegarLoop]: Abstraction has 9472 states and 12885 transitions. [2020-12-22 09:39:25,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:39:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 12885 transitions. [2020-12-22 09:39:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:39:25,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:25,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:25,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:39:25,225 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:25,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1699429479, now seen corresponding path program 1 times [2020-12-22 09:39:25,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:25,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617785652] [2020-12-22 09:39:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:26,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617785652] [2020-12-22 09:39:26,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009361414] [2020-12-22 09:39:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 09:39:26,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:27,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:28,053 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:39:28,619 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-22 09:39:28,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:28,959 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-22 09:39:28,971 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:29,433 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:39:29,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:29,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:41,253 WARN L197 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 346 DAG size of output: 45 [2020-12-22 09:39:42,587 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:39:43,775 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:39:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:43,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:43,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 39 [2020-12-22 09:39:43,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340678480] [2020-12-22 09:39:43,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:39:43,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:43,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:39:43,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:39:43,936 INFO L87 Difference]: Start difference. First operand 9472 states and 12885 transitions. Second operand 39 states. [2020-12-22 09:39:44,347 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-22 09:39:45,792 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-12-22 09:39:46,142 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 09:39:46,571 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:39:47,043 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 09:39:47,387 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:39:47,774 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:39:48,248 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:39:48,699 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:39:49,308 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-12-22 09:39:50,068 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-12-22 09:39:50,729 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-12-22 09:39:51,853 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-12-22 09:39:56,420 WARN L197 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-12-22 09:39:56,850 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-12-22 09:40:01,133 WARN L197 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:40:05,643 WARN L197 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-12-22 09:40:06,023 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-22 09:40:09,010 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:40:13,974 WARN L197 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 09:40:19,479 WARN L197 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-12-22 09:40:22,987 WARN L197 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:40:25,497 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:40:29,312 WARN L197 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:40:29,554 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:40:32,341 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:40:32,614 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:40:33,393 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:40:36,698 WARN L197 SmtUtils]: Spent 985.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:40:41,427 WARN L197 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:40:41,907 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:40:44,950 WARN L197 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:40:49,824 WARN L197 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:40:52,843 WARN L197 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:40:55,663 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:41:00,627 WARN L197 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 58