/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.4.ufo.UNBOUNDED.pals+Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:48:30,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:48:30,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:48:30,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:48:30,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:48:30,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:48:30,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:48:30,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:48:30,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:48:30,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:48:30,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:48:30,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:48:30,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:48:30,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:48:30,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:48:30,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:48:30,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:48:30,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:48:30,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:48:30,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:48:30,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:48:30,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:48:30,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:48:30,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:48:30,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:48:30,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:48:30,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:48:30,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:48:30,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:48:30,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:48:30,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:48:30,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:48:30,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:48:30,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:48:30,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:48:30,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:48:30,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:48:30,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:48:30,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:48:30,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:48:30,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:48:30,857 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:48:30,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:48:30,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:48:30,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:48:30,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:48:30,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:48:30,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:48:30,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:48:30,860 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:48:30,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:48:30,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:48:30,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:48:30,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:48:30,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:48:30,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:48:30,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:48:30,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:48:30,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:48:30,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:48:30,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:48:30,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:48:30,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:48:31,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:48:31,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:48:31,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:48:31,283 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:48:31,284 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:48:31,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 09:48:31,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8fbfa7a/e68b3ee7eb59406c9a4a04a7b423632f/FLAG72d291ae4 [2020-12-22 09:48:32,524 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:48:32,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 09:48:32,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8fbfa7a/e68b3ee7eb59406c9a4a04a7b423632f/FLAG72d291ae4 [2020-12-22 09:48:32,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8fbfa7a/e68b3ee7eb59406c9a4a04a7b423632f [2020-12-22 09:48:32,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:48:32,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:48:33,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:33,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:48:33,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:48:33,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:32" (1/1) ... [2020-12-22 09:48:33,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e959833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:33, skipping insertion in model container [2020-12-22 09:48:33,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:32" (1/1) ... [2020-12-22 09:48:33,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:48:33,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:48:33,672 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.4.ufo.UNBOUNDED.pals+Problem12_label07.c[8784,8797] [2020-12-22 09:48:33,714 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.4.ufo.UNBOUNDED.pals+Problem12_label07.c[9383,9396] [2020-12-22 09:48:34,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:34,753 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:48:34,794 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.4.ufo.UNBOUNDED.pals+Problem12_label07.c[8784,8797] [2020-12-22 09:48:34,874 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.4.ufo.UNBOUNDED.pals+Problem12_label07.c[9383,9396] [2020-12-22 09:48:35,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:35,530 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:48:35,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35 WrapperNode [2020-12-22 09:48:35,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:35,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:35,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:48:35,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:48:35,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (1/1) ... [2020-12-22 09:48:35,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (1/1) ... [2020-12-22 09:48:36,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:36,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:48:36,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:48:36,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:48:36,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (1/1) ... [2020-12-22 09:48:36,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (1/1) ... [2020-12-22 09:48:36,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (1/1) ... [2020-12-22 09:48:36,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (1/1) ... [2020-12-22 09:48:36,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (1/1) ... [2020-12-22 09:48:36,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (1/1) ... [2020-12-22 09:48:36,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (1/1) ... [2020-12-22 09:48:36,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:48:36,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:48:36,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:48:36,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:48:36,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (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 09:48:36,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:48:36,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:48:36,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:48:36,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:48:44,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:48:44,122 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:48:44,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:44 BoogieIcfgContainer [2020-12-22 09:48:44,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:48:44,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:48:44,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:48:44,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:48:44,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:48:32" (1/3) ... [2020-12-22 09:48:44,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31709f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:44, skipping insertion in model container [2020-12-22 09:48:44,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:35" (2/3) ... [2020-12-22 09:48:44,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31709f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:44, skipping insertion in model container [2020-12-22 09:48:44,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:44" (3/3) ... [2020-12-22 09:48:44,136 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 09:48:44,143 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:48:44,150 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:48:44,171 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:48:44,207 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:48:44,207 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:48:44,207 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:48:44,208 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:48:44,208 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:48:44,208 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:48:44,208 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:48:44,208 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:48:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:48:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 09:48:44,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:44,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:44,251 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:44,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:44,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2134357506, now seen corresponding path program 1 times [2020-12-22 09:48:44,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:44,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464762507] [2020-12-22 09:48:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:44,504 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 09:48:44,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464762507] [2020-12-22 09:48:44,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:44,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:48:44,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393932915] [2020-12-22 09:48:44,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:44,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:44,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:44,534 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 3 states. [2020-12-22 09:48:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:54,007 INFO L93 Difference]: Finished difference Result 2512 states and 4836 transitions. [2020-12-22 09:48:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:54,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 09:48:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:54,043 INFO L225 Difference]: With dead ends: 2512 [2020-12-22 09:48:54,043 INFO L226 Difference]: Without dead ends: 1579 [2020-12-22 09:48:54,051 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 09:48:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-22 09:48:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2020-12-22 09:48:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-12-22 09:48:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2901 transitions. [2020-12-22 09:48:54,223 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2901 transitions. Word has length 7 [2020-12-22 09:48:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:54,224 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2901 transitions. [2020-12-22 09:48:54,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2901 transitions. [2020-12-22 09:48:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:48:54,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:54,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:54,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:48:54,229 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:48:54,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:54,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397485111] [2020-12-22 09:48:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:54,437 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 09:48:54,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397485111] [2020-12-22 09:48:54,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:54,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:54,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40981614] [2020-12-22 09:48:54,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:54,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:54,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:54,441 INFO L87 Difference]: Start difference. First operand 1579 states and 2901 transitions. Second operand 5 states. [2020-12-22 09:48:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:54,572 INFO L93 Difference]: Finished difference Result 1628 states and 2976 transitions. [2020-12-22 09:48:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:48:54,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:48:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:54,584 INFO L225 Difference]: With dead ends: 1628 [2020-12-22 09:48:54,584 INFO L226 Difference]: Without dead ends: 1579 [2020-12-22 09:48:54,586 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 09:48:54,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-22 09:48:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2020-12-22 09:48:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-12-22 09:48:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2878 transitions. [2020-12-22 09:48:54,632 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2878 transitions. Word has length 30 [2020-12-22 09:48:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:54,633 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2878 transitions. [2020-12-22 09:48:54,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2878 transitions. [2020-12-22 09:48:54,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:48:54,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:54,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:54,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:48:54,638 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:54,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:54,643 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:48:54,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:54,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216430754] [2020-12-22 09:48:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:54,861 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 09:48:54,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216430754] [2020-12-22 09:48:54,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:54,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:54,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460657245] [2020-12-22 09:48:54,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:54,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:54,864 INFO L87 Difference]: Start difference. First operand 1579 states and 2878 transitions. Second operand 6 states. [2020-12-22 09:48:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:55,139 INFO L93 Difference]: Finished difference Result 1939 states and 3446 transitions. [2020-12-22 09:48:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:48:55,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:48:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:55,153 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 09:48:55,154 INFO L226 Difference]: Without dead ends: 1894 [2020-12-22 09:48:55,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:48:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2020-12-22 09:48:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1622. [2020-12-22 09:48:55,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1622 states. [2020-12-22 09:48:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2946 transitions. [2020-12-22 09:48:55,221 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2946 transitions. Word has length 52 [2020-12-22 09:48:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:55,223 INFO L481 AbstractCegarLoop]: Abstraction has 1622 states and 2946 transitions. [2020-12-22 09:48:55,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2946 transitions. [2020-12-22 09:48:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:55,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:55,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:55,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:48:55,233 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:55,234 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:48:55,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:55,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290496322] [2020-12-22 09:48:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:55,416 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 09:48:55,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290496322] [2020-12-22 09:48:55,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:55,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:55,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631165934] [2020-12-22 09:48:55,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:55,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:55,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:55,422 INFO L87 Difference]: Start difference. First operand 1622 states and 2946 transitions. Second operand 3 states. [2020-12-22 09:48:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:55,514 INFO L93 Difference]: Finished difference Result 1787 states and 3205 transitions. [2020-12-22 09:48:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:55,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:55,527 INFO L225 Difference]: With dead ends: 1787 [2020-12-22 09:48:55,527 INFO L226 Difference]: Without dead ends: 1699 [2020-12-22 09:48:55,528 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 09:48:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-12-22 09:48:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1695. [2020-12-22 09:48:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:48:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 3058 transitions. [2020-12-22 09:48:55,590 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 3058 transitions. Word has length 54 [2020-12-22 09:48:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:55,590 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 3058 transitions. [2020-12-22 09:48:55,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 3058 transitions. [2020-12-22 09:48:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:55,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:55,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:55,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:48:55,595 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:48:55,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:55,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838506908] [2020-12-22 09:48:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:55,899 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 09:48:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838506908] [2020-12-22 09:48:55,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:55,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:55,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260083532] [2020-12-22 09:48:55,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:55,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:55,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:55,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:55,903 INFO L87 Difference]: Start difference. First operand 1695 states and 3058 transitions. Second operand 6 states. [2020-12-22 09:48:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:56,190 INFO L93 Difference]: Finished difference Result 1858 states and 3310 transitions. [2020-12-22 09:48:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:56,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:48:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:56,204 INFO L225 Difference]: With dead ends: 1858 [2020-12-22 09:48:56,205 INFO L226 Difference]: Without dead ends: 1697 [2020-12-22 09:48:56,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:48:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2020-12-22 09:48:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1695. [2020-12-22 09:48:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:48:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 3056 transitions. [2020-12-22 09:48:56,264 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 3056 transitions. Word has length 54 [2020-12-22 09:48:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:56,265 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 3056 transitions. [2020-12-22 09:48:56,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 3056 transitions. [2020-12-22 09:48:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:56,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:56,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:56,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:48:56,267 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:56,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:48:56,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:56,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632199094] [2020-12-22 09:48:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:56,358 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 09:48:56,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632199094] [2020-12-22 09:48:56,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:56,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:56,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30155777] [2020-12-22 09:48:56,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:56,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:56,361 INFO L87 Difference]: Start difference. First operand 1695 states and 3056 transitions. Second operand 3 states. [2020-12-22 09:48:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:56,427 INFO L93 Difference]: Finished difference Result 1993 states and 3514 transitions. [2020-12-22 09:48:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:56,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:56,442 INFO L225 Difference]: With dead ends: 1993 [2020-12-22 09:48:56,442 INFO L226 Difference]: Without dead ends: 1832 [2020-12-22 09:48:56,443 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 09:48:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-12-22 09:48:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1830. [2020-12-22 09:48:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1830 states. [2020-12-22 09:48:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 3260 transitions. [2020-12-22 09:48:56,508 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 3260 transitions. Word has length 54 [2020-12-22 09:48:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:56,509 INFO L481 AbstractCegarLoop]: Abstraction has 1830 states and 3260 transitions. [2020-12-22 09:48:56,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 3260 transitions. [2020-12-22 09:48:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:56,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:56,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:56,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:48:56,513 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:56,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:56,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:48:56,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:56,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061293022] [2020-12-22 09:48:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:56,633 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 09:48:56,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061293022] [2020-12-22 09:48:56,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:56,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:56,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956234732] [2020-12-22 09:48:56,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:56,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:56,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:56,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:56,636 INFO L87 Difference]: Start difference. First operand 1830 states and 3260 transitions. Second operand 3 states. [2020-12-22 09:48:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:56,715 INFO L93 Difference]: Finished difference Result 2374 states and 4086 transitions. [2020-12-22 09:48:56,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:56,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:56,729 INFO L225 Difference]: With dead ends: 2374 [2020-12-22 09:48:56,729 INFO L226 Difference]: Without dead ends: 2078 [2020-12-22 09:48:56,730 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 09:48:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2020-12-22 09:48:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 2076. [2020-12-22 09:48:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-12-22 09:48:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3624 transitions. [2020-12-22 09:48:56,813 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3624 transitions. Word has length 54 [2020-12-22 09:48:56,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:56,813 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 3624 transitions. [2020-12-22 09:48:56,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3624 transitions. [2020-12-22 09:48:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:56,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:56,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:56,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:48:56,815 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:56,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:48:56,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:56,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949879454] [2020-12-22 09:48:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:56,889 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 09:48:56,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949879454] [2020-12-22 09:48:56,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:56,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:56,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974396481] [2020-12-22 09:48:56,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:56,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:56,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:56,892 INFO L87 Difference]: Start difference. First operand 2076 states and 3624 transitions. Second operand 3 states. [2020-12-22 09:48:57,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:57,000 INFO L93 Difference]: Finished difference Result 3064 states and 5098 transitions. [2020-12-22 09:48:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:57,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:57,019 INFO L225 Difference]: With dead ends: 3064 [2020-12-22 09:48:57,019 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:48:57,022 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 09:48:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:48:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2520. [2020-12-22 09:48:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2020-12-22 09:48:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 4264 transitions. [2020-12-22 09:48:57,133 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 4264 transitions. Word has length 54 [2020-12-22 09:48:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:57,134 INFO L481 AbstractCegarLoop]: Abstraction has 2520 states and 4264 transitions. [2020-12-22 09:48:57,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 4264 transitions. [2020-12-22 09:48:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:48:57,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:57,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:57,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:48:57,136 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:48:57,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:57,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684751985] [2020-12-22 09:48:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:57,293 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 09:48:57,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684751985] [2020-12-22 09:48:57,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:57,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:57,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636514282] [2020-12-22 09:48:57,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:57,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:57,296 INFO L87 Difference]: Start difference. First operand 2520 states and 4264 transitions. Second operand 5 states. [2020-12-22 09:48:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:57,532 INFO L93 Difference]: Finished difference Result 3274 states and 5349 transitions. [2020-12-22 09:48:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:48:57,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:48:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:57,550 INFO L225 Difference]: With dead ends: 3274 [2020-12-22 09:48:57,550 INFO L226 Difference]: Without dead ends: 3272 [2020-12-22 09:48:57,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:48:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2020-12-22 09:48:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2568. [2020-12-22 09:48:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-12-22 09:48:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 4304 transitions. [2020-12-22 09:48:57,681 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 4304 transitions. Word has length 55 [2020-12-22 09:48:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:57,681 INFO L481 AbstractCegarLoop]: Abstraction has 2568 states and 4304 transitions. [2020-12-22 09:48:57,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:57,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 4304 transitions. [2020-12-22 09:48:57,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:48:57,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:57,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:57,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:48:57,683 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:57,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:57,683 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:48:57,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:57,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912304146] [2020-12-22 09:48:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:57,739 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 09:48:57,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912304146] [2020-12-22 09:48:57,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:57,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:57,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510001577] [2020-12-22 09:48:57,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:57,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:57,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:57,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:57,748 INFO L87 Difference]: Start difference. First operand 2568 states and 4304 transitions. Second operand 3 states. [2020-12-22 09:48:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:57,907 INFO L93 Difference]: Finished difference Result 3631 states and 5862 transitions. [2020-12-22 09:48:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:57,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:48:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:57,928 INFO L225 Difference]: With dead ends: 3631 [2020-12-22 09:48:57,928 INFO L226 Difference]: Without dead ends: 3036 [2020-12-22 09:48:57,932 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 09:48:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2020-12-22 09:48:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 3034. [2020-12-22 09:48:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:48:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4962 transitions. [2020-12-22 09:48:58,168 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4962 transitions. Word has length 56 [2020-12-22 09:48:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:58,168 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4962 transitions. [2020-12-22 09:48:58,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4962 transitions. [2020-12-22 09:48:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:48:58,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:58,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:58,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:48:58,171 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:58,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1564395230, now seen corresponding path program 1 times [2020-12-22 09:48:58,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:58,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951922367] [2020-12-22 09:48:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:58,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951922367] [2020-12-22 09:48:58,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:58,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:48:58,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752325313] [2020-12-22 09:48:58,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:58,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:58,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:58,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:58,278 INFO L87 Difference]: Start difference. First operand 3034 states and 4962 transitions. Second operand 3 states. [2020-12-22 09:49:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:07,509 INFO L93 Difference]: Finished difference Result 6040 states and 10513 transitions. [2020-12-22 09:49:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:07,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 09:49:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:07,560 INFO L225 Difference]: With dead ends: 6040 [2020-12-22 09:49:07,560 INFO L226 Difference]: Without dead ends: 4536 [2020-12-22 09:49:07,564 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 09:49:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2020-12-22 09:49:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4536. [2020-12-22 09:49:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4536 states. [2020-12-22 09:49:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 6884 transitions. [2020-12-22 09:49:07,745 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 6884 transitions. Word has length 76 [2020-12-22 09:49:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:07,746 INFO L481 AbstractCegarLoop]: Abstraction has 4536 states and 6884 transitions. [2020-12-22 09:49:07,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 6884 transitions. [2020-12-22 09:49:07,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:07,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:07,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:07,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:49:07,755 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:49:07,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:07,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263818490] [2020-12-22 09:49:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:49:07,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263818490] [2020-12-22 09:49:07,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:07,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:07,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993914266] [2020-12-22 09:49:07,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:07,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:07,904 INFO L87 Difference]: Start difference. First operand 4536 states and 6884 transitions. Second operand 6 states. [2020-12-22 09:49:08,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:08,559 INFO L93 Difference]: Finished difference Result 10842 states and 15925 transitions. [2020-12-22 09:49:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:08,560 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:08,593 INFO L225 Difference]: With dead ends: 10842 [2020-12-22 09:49:08,593 INFO L226 Difference]: Without dead ends: 9344 [2020-12-22 09:49:08,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:49:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2020-12-22 09:49:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 6032. [2020-12-22 09:49:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6032 states. [2020-12-22 09:49:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6032 states to 6032 states and 9012 transitions. [2020-12-22 09:49:08,938 INFO L78 Accepts]: Start accepts. Automaton has 6032 states and 9012 transitions. Word has length 78 [2020-12-22 09:49:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:08,938 INFO L481 AbstractCegarLoop]: Abstraction has 6032 states and 9012 transitions. [2020-12-22 09:49:08,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 6032 states and 9012 transitions. [2020-12-22 09:49:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:08,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:08,941 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:08,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:49:08,941 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:49:08,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:08,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382020819] [2020-12-22 09:49:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:49:09,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382020819] [2020-12-22 09:49:09,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:09,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:09,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867943960] [2020-12-22 09:49:09,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:09,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:09,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:09,067 INFO L87 Difference]: Start difference. First operand 6032 states and 9012 transitions. Second operand 6 states. [2020-12-22 09:49:09,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:09,768 INFO L93 Difference]: Finished difference Result 12338 states and 18053 transitions. [2020-12-22 09:49:09,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:09,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:09,794 INFO L225 Difference]: With dead ends: 12338 [2020-12-22 09:49:09,794 INFO L226 Difference]: Without dead ends: 10840 [2020-12-22 09:49:09,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:49:09,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10840 states. [2020-12-22 09:49:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10840 to 8280. [2020-12-22 09:49:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8280 states. [2020-12-22 09:49:10,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 12184 transitions. [2020-12-22 09:49:10,366 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 12184 transitions. Word has length 78 [2020-12-22 09:49:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:10,367 INFO L481 AbstractCegarLoop]: Abstraction has 8280 states and 12184 transitions. [2020-12-22 09:49:10,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:10,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 12184 transitions. [2020-12-22 09:49:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:10,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:10,370 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:10,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:49:10,370 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:10,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:10,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:49:10,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:10,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761918768] [2020-12-22 09:49:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:49:10,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761918768] [2020-12-22 09:49:10,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:10,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:10,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813398118] [2020-12-22 09:49:10,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:10,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:10,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:10,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:10,512 INFO L87 Difference]: Start difference. First operand 8280 states and 12184 transitions. Second operand 6 states. [2020-12-22 09:49:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:11,253 INFO L93 Difference]: Finished difference Result 13834 states and 20181 transitions. [2020-12-22 09:49:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:11,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:11,286 INFO L225 Difference]: With dead ends: 13834 [2020-12-22 09:49:11,286 INFO L226 Difference]: Without dead ends: 12336 [2020-12-22 09:49:11,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:49:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12336 states. [2020-12-22 09:49:11,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12336 to 9776. [2020-12-22 09:49:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9776 states. [2020-12-22 09:49:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9776 states to 9776 states and 14312 transitions. [2020-12-22 09:49:11,926 INFO L78 Accepts]: Start accepts. Automaton has 9776 states and 14312 transitions. Word has length 78 [2020-12-22 09:49:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:11,926 INFO L481 AbstractCegarLoop]: Abstraction has 9776 states and 14312 transitions. [2020-12-22 09:49:11,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 9776 states and 14312 transitions. [2020-12-22 09:49:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:49:11,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:11,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:11,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:49:11,930 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:11,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:49:11,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:11,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777062763] [2020-12-22 09:49:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:12,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777062763] [2020-12-22 09:49:12,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:12,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:12,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259648292] [2020-12-22 09:49:12,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:12,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:12,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:12,003 INFO L87 Difference]: Start difference. First operand 9776 states and 14312 transitions. Second operand 3 states. [2020-12-22 09:49:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:12,312 INFO L93 Difference]: Finished difference Result 14557 states and 21184 transitions. [2020-12-22 09:49:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:12,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:49:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:12,331 INFO L225 Difference]: With dead ends: 14557 [2020-12-22 09:49:12,332 INFO L226 Difference]: Without dead ends: 7819 [2020-12-22 09:49:12,343 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 09:49:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7819 states. [2020-12-22 09:49:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7819 to 7817. [2020-12-22 09:49:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7817 states. [2020-12-22 09:49:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7817 states to 7817 states and 11529 transitions. [2020-12-22 09:49:12,648 INFO L78 Accepts]: Start accepts. Automaton has 7817 states and 11529 transitions. Word has length 80 [2020-12-22 09:49:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:12,648 INFO L481 AbstractCegarLoop]: Abstraction has 7817 states and 11529 transitions. [2020-12-22 09:49:12,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7817 states and 11529 transitions. [2020-12-22 09:49:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:49:12,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:12,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:12,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:49:12,652 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:12,653 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:49:12,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:12,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988435766] [2020-12-22 09:49:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:49:12,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988435766] [2020-12-22 09:49:12,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:12,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:12,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745684264] [2020-12-22 09:49:12,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:12,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:12,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:12,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:12,767 INFO L87 Difference]: Start difference. First operand 7817 states and 11529 transitions. Second operand 6 states. [2020-12-22 09:49:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:13,322 INFO L93 Difference]: Finished difference Result 12051 states and 17614 transitions. [2020-12-22 09:49:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:13,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:49:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:13,349 INFO L225 Difference]: With dead ends: 12051 [2020-12-22 09:49:13,350 INFO L226 Difference]: Without dead ends: 10993 [2020-12-22 09:49:13,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:49:13,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10993 states. [2020-12-22 09:49:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10993 to 8873. [2020-12-22 09:49:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8873 states. [2020-12-22 09:49:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8873 states to 8873 states and 13033 transitions. [2020-12-22 09:49:13,772 INFO L78 Accepts]: Start accepts. Automaton has 8873 states and 13033 transitions. Word has length 80 [2020-12-22 09:49:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:13,773 INFO L481 AbstractCegarLoop]: Abstraction has 8873 states and 13033 transitions. [2020-12-22 09:49:13,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 8873 states and 13033 transitions. [2020-12-22 09:49:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:13,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:13,776 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:13,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:49:13,777 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:49:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:13,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156834143] [2020-12-22 09:49:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:13,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156834143] [2020-12-22 09:49:13,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:13,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:13,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358688833] [2020-12-22 09:49:13,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:13,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:13,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:13,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:13,848 INFO L87 Difference]: Start difference. First operand 8873 states and 13033 transitions. Second operand 3 states. [2020-12-22 09:49:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:14,051 INFO L93 Difference]: Finished difference Result 11781 states and 17171 transitions. [2020-12-22 09:49:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:14,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:49:14,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:14,062 INFO L225 Difference]: With dead ends: 11781 [2020-12-22 09:49:14,062 INFO L226 Difference]: Without dead ends: 5971 [2020-12-22 09:49:14,071 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 09:49:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2020-12-22 09:49:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5969. [2020-12-22 09:49:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5969 states. [2020-12-22 09:49:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5969 states to 5969 states and 8853 transitions. [2020-12-22 09:49:14,316 INFO L78 Accepts]: Start accepts. Automaton has 5969 states and 8853 transitions. Word has length 81 [2020-12-22 09:49:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:14,317 INFO L481 AbstractCegarLoop]: Abstraction has 5969 states and 8853 transitions. [2020-12-22 09:49:14,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:14,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5969 states and 8853 transitions. [2020-12-22 09:49:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:14,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:14,319 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:14,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:49:14,319 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:14,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:49:14,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:14,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649728385] [2020-12-22 09:49:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:14,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649728385] [2020-12-22 09:49:14,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:14,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:14,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214789533] [2020-12-22 09:49:14,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:14,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:14,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:14,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:14,434 INFO L87 Difference]: Start difference. First operand 5969 states and 8853 transitions. Second operand 3 states. [2020-12-22 09:49:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:14,565 INFO L93 Difference]: Finished difference Result 7425 states and 10901 transitions. [2020-12-22 09:49:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:14,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:49:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:14,574 INFO L225 Difference]: With dead ends: 7425 [2020-12-22 09:49:14,574 INFO L226 Difference]: Without dead ends: 4519 [2020-12-22 09:49:14,581 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 09:49:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2020-12-22 09:49:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 4517. [2020-12-22 09:49:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4517 states. [2020-12-22 09:49:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 6785 transitions. [2020-12-22 09:49:14,724 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 6785 transitions. Word has length 81 [2020-12-22 09:49:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:14,724 INFO L481 AbstractCegarLoop]: Abstraction has 4517 states and 6785 transitions. [2020-12-22 09:49:14,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 6785 transitions. [2020-12-22 09:49:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:14,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:14,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:14,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:49:14,726 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:49:14,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:14,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885731800] [2020-12-22 09:49:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:14,785 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 09:49:14,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885731800] [2020-12-22 09:49:14,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:14,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:14,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598308932] [2020-12-22 09:49:14,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:14,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:14,787 INFO L87 Difference]: Start difference. First operand 4517 states and 6785 transitions. Second operand 3 states. [2020-12-22 09:49:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:14,876 INFO L93 Difference]: Finished difference Result 5247 states and 7799 transitions. [2020-12-22 09:49:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:14,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:49:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:14,885 INFO L225 Difference]: With dead ends: 5247 [2020-12-22 09:49:14,885 INFO L226 Difference]: Without dead ends: 3793 [2020-12-22 09:49:14,888 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 09:49:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2020-12-22 09:49:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3791. [2020-12-22 09:49:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3791 states. [2020-12-22 09:49:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 5762 transitions. [2020-12-22 09:49:15,011 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 5762 transitions. Word has length 81 [2020-12-22 09:49:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:15,012 INFO L481 AbstractCegarLoop]: Abstraction has 3791 states and 5762 transitions. [2020-12-22 09:49:15,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:15,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 5762 transitions. [2020-12-22 09:49:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:15,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:15,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:15,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:49:15,015 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:15,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:49:15,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:15,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67641532] [2020-12-22 09:49:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:15,382 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:49:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:15,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67641532] [2020-12-22 09:49:15,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022352213] [2020-12-22 09:49:15,457 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 09:49:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:15,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:49:15,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:49:16,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:16,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:49:16,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162255104] [2020-12-22 09:49:16,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:49:16,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:49:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:49:16,227 INFO L87 Difference]: Start difference. First operand 3791 states and 5762 transitions. Second operand 12 states. [2020-12-22 09:49:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:18,619 INFO L93 Difference]: Finished difference Result 7224 states and 10411 transitions. [2020-12-22 09:49:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:49:18,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:49:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:18,636 INFO L225 Difference]: With dead ends: 7224 [2020-12-22 09:49:18,636 INFO L226 Difference]: Without dead ends: 6496 [2020-12-22 09:49:18,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:49:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6496 states. [2020-12-22 09:49:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6496 to 5583. [2020-12-22 09:49:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5583 states. [2020-12-22 09:49:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8051 transitions. [2020-12-22 09:49:18,981 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8051 transitions. Word has length 81 [2020-12-22 09:49:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:18,982 INFO L481 AbstractCegarLoop]: Abstraction has 5583 states and 8051 transitions. [2020-12-22 09:49:18,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:49:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8051 transitions. [2020-12-22 09:49:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:18,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:18,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:19,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:19,199 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:49:19,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:19,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405664049] [2020-12-22 09:49:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:19,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405664049] [2020-12-22 09:49:19,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746137951] [2020-12-22 09:49:19,529 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 09:49:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:49:19,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:20,043 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:20,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:20,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:20,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567735718] [2020-12-22 09:49:20,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:20,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:20,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:20,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:20,505 INFO L87 Difference]: Start difference. First operand 5583 states and 8051 transitions. Second operand 17 states. [2020-12-22 09:49:20,679 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:49:20,835 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 09:49:20,995 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:49:21,476 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 09:49:22,839 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:49:22,973 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:49:23,408 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:49:23,570 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:49:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:24,289 INFO L93 Difference]: Finished difference Result 15701 states and 21207 transitions. [2020-12-22 09:49:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:24,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:49:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:24,316 INFO L225 Difference]: With dead ends: 15701 [2020-12-22 09:49:24,316 INFO L226 Difference]: Without dead ends: 13394 [2020-12-22 09:49:24,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:49:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13394 states. [2020-12-22 09:49:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13394 to 9614. [2020-12-22 09:49:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9614 states. [2020-12-22 09:49:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 13233 transitions. [2020-12-22 09:49:25,075 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 13233 transitions. Word has length 82 [2020-12-22 09:49:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:25,075 INFO L481 AbstractCegarLoop]: Abstraction has 9614 states and 13233 transitions. [2020-12-22 09:49:25,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 13233 transitions. [2020-12-22 09:49:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:25,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:25,078 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:25,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:25,294 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:25,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:49:25,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:25,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719895421] [2020-12-22 09:49:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:25,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719895421] [2020-12-22 09:49:25,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515283331] [2020-12-22 09:49:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:49:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:25,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:49:25,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:26,105 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:26,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:26,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:26,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34026237] [2020-12-22 09:49:26,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:26,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:26,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:26,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:26,550 INFO L87 Difference]: Start difference. First operand 9614 states and 13233 transitions. Second operand 17 states. [2020-12-22 09:49:26,751 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:49:26,883 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 09:49:27,031 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 09:49:28,924 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 09:49:29,063 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 09:49:29,490 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:49:29,641 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 09:49:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:31,454 INFO L93 Difference]: Finished difference Result 33564 states and 44456 transitions. [2020-12-22 09:49:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:31,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:49:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:31,506 INFO L225 Difference]: With dead ends: 33564 [2020-12-22 09:49:31,507 INFO L226 Difference]: Without dead ends: 28048 [2020-12-22 09:49:31,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:49:31,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28048 states. [2020-12-22 09:49:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28048 to 20422. [2020-12-22 09:49:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20422 states. [2020-12-22 09:49:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20422 states to 20422 states and 26967 transitions. [2020-12-22 09:49:33,413 INFO L78 Accepts]: Start accepts. Automaton has 20422 states and 26967 transitions. Word has length 82 [2020-12-22 09:49:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:33,414 INFO L481 AbstractCegarLoop]: Abstraction has 20422 states and 26967 transitions. [2020-12-22 09:49:33,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 20422 states and 26967 transitions. [2020-12-22 09:49:33,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:33,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:33,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:33,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:49:33,631 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:33,632 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:49:33,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:33,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067574082] [2020-12-22 09:49:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:49:33,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067574082] [2020-12-22 09:49:33,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:33,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:33,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833581834] [2020-12-22 09:49:33,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:33,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:33,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:33,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:33,735 INFO L87 Difference]: Start difference. First operand 20422 states and 26967 transitions. Second operand 6 states. [2020-12-22 09:49:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:35,504 INFO L93 Difference]: Finished difference Result 34866 states and 45567 transitions. [2020-12-22 09:49:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:35,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:35,524 INFO L225 Difference]: With dead ends: 34866 [2020-12-22 09:49:35,524 INFO L226 Difference]: Without dead ends: 17579 [2020-12-22 09:49:35,547 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 09:49:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17579 states. [2020-12-22 09:49:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17579 to 17579. [2020-12-22 09:49:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17579 states. [2020-12-22 09:49:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17579 states to 17579 states and 23083 transitions. [2020-12-22 09:49:36,934 INFO L78 Accepts]: Start accepts. Automaton has 17579 states and 23083 transitions. Word has length 82 [2020-12-22 09:49:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:36,934 INFO L481 AbstractCegarLoop]: Abstraction has 17579 states and 23083 transitions. [2020-12-22 09:49:36,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 17579 states and 23083 transitions. [2020-12-22 09:49:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:36,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:36,937 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:36,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:49:36,937 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:49:36,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:36,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600475907] [2020-12-22 09:49:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:49:37,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600475907] [2020-12-22 09:49:37,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:37,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:37,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169950946] [2020-12-22 09:49:37,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:37,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:37,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:37,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:37,038 INFO L87 Difference]: Start difference. First operand 17579 states and 23083 transitions. Second operand 6 states. [2020-12-22 09:49:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:38,446 INFO L93 Difference]: Finished difference Result 28324 states and 36748 transitions. [2020-12-22 09:49:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:38,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:38,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:38,462 INFO L225 Difference]: With dead ends: 28324 [2020-12-22 09:49:38,462 INFO L226 Difference]: Without dead ends: 13906 [2020-12-22 09:49:38,477 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 09:49:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13906 states. [2020-12-22 09:49:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13906 to 13906. [2020-12-22 09:49:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13906 states. [2020-12-22 09:49:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13906 states to 13906 states and 18305 transitions. [2020-12-22 09:49:39,735 INFO L78 Accepts]: Start accepts. Automaton has 13906 states and 18305 transitions. Word has length 82 [2020-12-22 09:49:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:39,735 INFO L481 AbstractCegarLoop]: Abstraction has 13906 states and 18305 transitions. [2020-12-22 09:49:39,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:39,735 INFO L276 IsEmpty]: Start isEmpty. Operand 13906 states and 18305 transitions. [2020-12-22 09:49:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:39,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:39,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:39,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:49:39,737 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:49:39,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:39,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318921191] [2020-12-22 09:49:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:49:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318921191] [2020-12-22 09:49:39,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:39,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:39,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045845204] [2020-12-22 09:49:39,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:39,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:39,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:39,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:39,833 INFO L87 Difference]: Start difference. First operand 13906 states and 18305 transitions. Second operand 6 states. [2020-12-22 09:49:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:40,883 INFO L93 Difference]: Finished difference Result 22261 states and 28866 transitions. [2020-12-22 09:49:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:40,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:40,896 INFO L225 Difference]: With dead ends: 22261 [2020-12-22 09:49:40,897 INFO L226 Difference]: Without dead ends: 11434 [2020-12-22 09:49:40,904 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 09:49:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11434 states. [2020-12-22 09:49:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11434 to 11434. [2020-12-22 09:49:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11434 states. [2020-12-22 09:49:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11434 states to 11434 states and 15186 transitions. [2020-12-22 09:49:41,781 INFO L78 Accepts]: Start accepts. Automaton has 11434 states and 15186 transitions. Word has length 82 [2020-12-22 09:49:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:41,782 INFO L481 AbstractCegarLoop]: Abstraction has 11434 states and 15186 transitions. [2020-12-22 09:49:41,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 11434 states and 15186 transitions. [2020-12-22 09:49:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:41,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:41,784 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:41,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:49:41,784 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:41,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:49:41,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:41,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160759977] [2020-12-22 09:49:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:42,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160759977] [2020-12-22 09:49:42,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111050373] [2020-12-22 09:49:42,111 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 09:49:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:42,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:49:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:42,577 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:42,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:42,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:42,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29696515] [2020-12-22 09:49:42,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:42,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:42,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:42,987 INFO L87 Difference]: Start difference. First operand 11434 states and 15186 transitions. Second operand 17 states. [2020-12-22 09:49:43,125 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 09:49:43,330 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:49:45,478 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 09:49:45,982 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 09:49:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:49,466 INFO L93 Difference]: Finished difference Result 44236 states and 55626 transitions. [2020-12-22 09:49:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:49,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:49:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:49,504 INFO L225 Difference]: With dead ends: 44236 [2020-12-22 09:49:49,504 INFO L226 Difference]: Without dead ends: 37215 [2020-12-22 09:49:49,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:49:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37215 states. [2020-12-22 09:49:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37215 to 24353. [2020-12-22 09:49:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24353 states. [2020-12-22 09:49:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24353 states to 24353 states and 31235 transitions. [2020-12-22 09:49:51,819 INFO L78 Accepts]: Start accepts. Automaton has 24353 states and 31235 transitions. Word has length 83 [2020-12-22 09:49:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:51,820 INFO L481 AbstractCegarLoop]: Abstraction has 24353 states and 31235 transitions. [2020-12-22 09:49:51,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 24353 states and 31235 transitions. [2020-12-22 09:49:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:51,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:51,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:52,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:52,036 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:49:52,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:52,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452928652] [2020-12-22 09:49:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:49:52,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452928652] [2020-12-22 09:49:52,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:52,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:52,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580905587] [2020-12-22 09:49:52,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:52,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:52,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:52,162 INFO L87 Difference]: Start difference. First operand 24353 states and 31235 transitions. Second operand 6 states. [2020-12-22 09:49:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:54,126 INFO L93 Difference]: Finished difference Result 40446 states and 51191 transitions. [2020-12-22 09:49:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:54,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:49:54,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:54,148 INFO L225 Difference]: With dead ends: 40446 [2020-12-22 09:49:54,148 INFO L226 Difference]: Without dead ends: 19328 [2020-12-22 09:49:54,164 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 09:49:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19328 states. [2020-12-22 09:49:56,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19328 to 19328. [2020-12-22 09:49:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19328 states. [2020-12-22 09:49:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19328 states to 19328 states and 24632 transitions. [2020-12-22 09:49:56,029 INFO L78 Accepts]: Start accepts. Automaton has 19328 states and 24632 transitions. Word has length 83 [2020-12-22 09:49:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:56,035 INFO L481 AbstractCegarLoop]: Abstraction has 19328 states and 24632 transitions. [2020-12-22 09:49:56,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 19328 states and 24632 transitions. [2020-12-22 09:49:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:49:56,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:56,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:56,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:49:56,038 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:56,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:49:56,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:56,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003860003] [2020-12-22 09:49:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:58,227 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-12-22 09:49:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:58,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003860003] [2020-12-22 09:49:58,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801437614] [2020-12-22 09:49:58,892 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 09:49:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:59,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:49:59,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:00,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:00,428 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 27 [2020-12-22 09:50:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:01,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:01,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 09:50:01,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499170012] [2020-12-22 09:50:01,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 09:50:01,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 09:50:01,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 09:50:01,199 INFO L87 Difference]: Start difference. First operand 19328 states and 24632 transitions. Second operand 40 states. [2020-12-22 09:50:01,950 WARN L197 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 09:50:02,892 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-12-22 09:50:03,112 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2020-12-22 09:50:03,340 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-22 09:50:03,581 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 09:50:03,996 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-22 09:50:04,485 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:50:04,882 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:50:05,414 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:50:06,018 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 09:50:06,816 WARN L197 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-22 09:50:07,521 WARN L197 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-22 09:50:08,334 WARN L197 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-12-22 09:50:09,156 WARN L197 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-12-22 09:50:09,710 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:50:10,245 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:50:10,643 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:50:11,188 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:50:11,594 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:50:12,162 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:50:12,581 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:50:12,886 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:50:13,302 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:50:13,669 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:50:13,962 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:50:14,488 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 09:50:15,189 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:50:15,445 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:50:15,766 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:50:16,010 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:50:16,979 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:50:17,388 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:50:17,780 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:50:18,016 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-12-22 09:50:18,342 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:50:19,092 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:50:19,496 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:50:19,803 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:50:20,508 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:50:20,827 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:50:21,768 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:50:22,304 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:22,607 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:22,824 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:50:23,180 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:50:24,321 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:50:25,976 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 09:50:26,516 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:50:26,861 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:50:27,162 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-12-22 09:50:27,615 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:50:28,039 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:50:28,245 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 09:50:28,583 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:50:28,949 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:50:29,304 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:50:29,568 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:50:29,874 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:50:30,162 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:30,661 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 09:50:30,927 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:50:31,583 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 09:50:32,013 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 09:50:32,512 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:50:32,800 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:50:33,138 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:50:33,554 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:50:33,925 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:50:34,178 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:50:34,958 WARN L197 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-12-22 09:50:35,272 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:50:35,765 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:36,601 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:50:36,910 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:50:37,236 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:50:39,055 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-12-22 09:50:40,643 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-22 09:50:41,089 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:50:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:42,216 INFO L93 Difference]: Finished difference Result 31910 states and 40462 transitions. [2020-12-22 09:50:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 09:50:42,218 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-12-22 09:50:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:42,245 INFO L225 Difference]: With dead ends: 31910 [2020-12-22 09:50:42,245 INFO L226 Difference]: Without dead ends: 25759 [2020-12-22 09:50:42,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=2729, Invalid=17011, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 09:50:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25759 states. [2020-12-22 09:50:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25759 to 17526. [2020-12-22 09:50:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17526 states. [2020-12-22 09:50:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17526 states to 17526 states and 22493 transitions. [2020-12-22 09:50:44,070 INFO L78 Accepts]: Start accepts. Automaton has 17526 states and 22493 transitions. Word has length 84 [2020-12-22 09:50:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:44,070 INFO L481 AbstractCegarLoop]: Abstraction has 17526 states and 22493 transitions. [2020-12-22 09:50:44,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 09:50:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 17526 states and 22493 transitions. [2020-12-22 09:50:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:50:44,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:44,072 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:44,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:50:44,273 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:44,274 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:50:44,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:44,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040107025] [2020-12-22 09:50:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:44,811 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:50:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:45,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040107025] [2020-12-22 09:50:45,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090729771] [2020-12-22 09:50:45,227 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 09:50:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:45,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:50:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:45,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:46,481 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:50:46,694 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:50:46,980 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:50:47,344 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-22 09:50:47,433 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 09:50:47,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:47,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-12-22 09:50:47,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703359455] [2020-12-22 09:50:47,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:50:47,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:47,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:50:47,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:50:47,435 INFO L87 Difference]: Start difference. First operand 17526 states and 22493 transitions. Second operand 23 states. [2020-12-22 09:50:47,701 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:50:48,121 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 09:50:48,346 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:50:48,627 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:50:48,964 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:49,323 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 09:50:50,006 WARN L197 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:50:50,443 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 09:50:50,958 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 09:50:51,650 WARN L197 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:52,357 WARN L197 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:53,087 WARN L197 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:53,596 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:50:54,229 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-22 09:50:54,745 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:50:55,410 WARN L197 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:50:55,682 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:50:56,113 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:50:56,501 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:50:57,104 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:50:57,425 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:50:57,879 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:50:58,194 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:50:58,944 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:50:59,877 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 09:51:00,145 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-12-22 09:51:00,519 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:51:00,956 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 09:51:01,455 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:51:01,895 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 09:51:02,373 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 09:51:02,995 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 09:51:03,626 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 09:51:03,981 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:51:04,450 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:51:04,756 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:51:05,227 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-12-22 09:51:05,441 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 09:51:05,666 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:51:06,100 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:51:06,457 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:51:06,697 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:51:07,096 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:51:07,621 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:51:07,935 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:51:08,236 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:51:08,670 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:51:09,022 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:51:09,340 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 09:51:09,714 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:51:10,006 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:51:10,353 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:51:11,224 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:51:11,667 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:51:12,049 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:51:12,448 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:51:12,949 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:51:13,569 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:51:14,117 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:51:14,414 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:51:14,888 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:51:15,202 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:51:15,586 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:51:16,732 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-12-22 09:51:16,956 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-22 09:51:17,496 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 09:51:18,288 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 09:51:18,600 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 09:51:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:19,967 INFO L93 Difference]: Finished difference Result 31642 states and 40618 transitions. [2020-12-22 09:51:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:51:19,967 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 09:51:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:19,987 INFO L225 Difference]: With dead ends: 31642 [2020-12-22 09:51:19,987 INFO L226 Difference]: Without dead ends: 22961 [2020-12-22 09:51:19,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=1522, Invalid=10468, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 09:51:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22961 states. [2020-12-22 09:51:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22961 to 13273. [2020-12-22 09:51:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13273 states. [2020-12-22 09:51:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 17351 transitions. [2020-12-22 09:51:21,585 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 17351 transitions. Word has length 84 [2020-12-22 09:51:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:21,585 INFO L481 AbstractCegarLoop]: Abstraction has 13273 states and 17351 transitions. [2020-12-22 09:51:21,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:51:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 17351 transitions. [2020-12-22 09:51:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:51:21,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:21,586 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:21,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:51:21,798 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash -720448498, now seen corresponding path program 1 times [2020-12-22 09:51:21,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:21,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242250319] [2020-12-22 09:51:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:21,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242250319] [2020-12-22 09:51:21,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:21,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:51:21,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859168575] [2020-12-22 09:51:21,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:21,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:21,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:21,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:21,899 INFO L87 Difference]: Start difference. First operand 13273 states and 17351 transitions. Second operand 3 states. [2020-12-22 09:51:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:36,184 INFO L93 Difference]: Finished difference Result 19285 states and 26747 transitions. [2020-12-22 09:51:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:36,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 09:51:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:36,203 INFO L225 Difference]: With dead ends: 19285 [2020-12-22 09:51:36,203 INFO L226 Difference]: Without dead ends: 16279 [2020-12-22 09:51:36,208 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 09:51:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16279 states. [2020-12-22 09:51:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16279 to 15526. [2020-12-22 09:51:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15526 states. [2020-12-22 09:51:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15526 states to 15526 states and 20421 transitions. [2020-12-22 09:51:37,750 INFO L78 Accepts]: Start accepts. Automaton has 15526 states and 20421 transitions. Word has length 84 [2020-12-22 09:51:37,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:37,751 INFO L481 AbstractCegarLoop]: Abstraction has 15526 states and 20421 transitions. [2020-12-22 09:51:37,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 15526 states and 20421 transitions. [2020-12-22 09:51:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:51:37,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:37,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:37,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 09:51:37,752 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:37,753 INFO L82 PathProgramCache]: Analyzing trace with hash -696943534, now seen corresponding path program 1 times [2020-12-22 09:51:37,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:37,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952030855] [2020-12-22 09:51:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:38,210 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-12-22 09:51:38,493 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-12-22 09:51:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:38,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952030855] [2020-12-22 09:51:38,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271963385] [2020-12-22 09:51:38,884 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 09:51:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:51:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:39,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:51:40,277 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-12-22 09:51:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:41,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:41,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 09:51:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067982816] [2020-12-22 09:51:41,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:51:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:51:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:51:41,028 INFO L87 Difference]: Start difference. First operand 15526 states and 20421 transitions. Second operand 24 states. [2020-12-22 09:51:41,688 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2020-12-22 09:51:42,041 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-12-22 09:51:42,519 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:51:42,997 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:51:43,364 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 09:51:43,704 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 09:51:44,097 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:51:44,632 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 09:51:45,343 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 09:51:46,153 WARN L197 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:51:46,558 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-12-22 09:51:47,150 WARN L197 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 09:51:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:49,406 INFO L93 Difference]: Finished difference Result 22356 states and 28681 transitions. [2020-12-22 09:51:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:51:49,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 09:51:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:49,424 INFO L225 Difference]: With dead ends: 22356 [2020-12-22 09:51:49,425 INFO L226 Difference]: Without dead ends: 17461 [2020-12-22 09:51:49,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 09:51:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17461 states. [2020-12-22 09:51:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17461 to 13434. [2020-12-22 09:51:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13434 states. [2020-12-22 09:51:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13434 states to 13434 states and 17890 transitions. [2020-12-22 09:51:50,668 INFO L78 Accepts]: Start accepts. Automaton has 13434 states and 17890 transitions. Word has length 86 [2020-12-22 09:51:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:50,668 INFO L481 AbstractCegarLoop]: Abstraction has 13434 states and 17890 transitions. [2020-12-22 09:51:50,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:51:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 13434 states and 17890 transitions. [2020-12-22 09:51:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:51:50,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:50,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:50,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:50,883 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:50,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1284129498, now seen corresponding path program 1 times [2020-12-22 09:51:50,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:50,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538419281] [2020-12-22 09:51:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:51,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538419281] [2020-12-22 09:51:51,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:51,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:51,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917230125] [2020-12-22 09:51:51,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:51:51,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:51:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:51:51,040 INFO L87 Difference]: Start difference. First operand 13434 states and 17890 transitions. Second operand 4 states. [2020-12-22 09:52:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:14,973 INFO L93 Difference]: Finished difference Result 24701 states and 34296 transitions. [2020-12-22 09:52:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:52:14,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-12-22 09:52:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:14,993 INFO L225 Difference]: With dead ends: 24701 [2020-12-22 09:52:14,994 INFO L226 Difference]: Without dead ends: 19442 [2020-12-22 09:52:14,998 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 09:52:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19442 states. [2020-12-22 09:52:16,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19442 to 19442. [2020-12-22 09:52:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19442 states. [2020-12-22 09:52:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19442 states to 19442 states and 26150 transitions. [2020-12-22 09:52:16,348 INFO L78 Accepts]: Start accepts. Automaton has 19442 states and 26150 transitions. Word has length 111 [2020-12-22 09:52:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:16,349 INFO L481 AbstractCegarLoop]: Abstraction has 19442 states and 26150 transitions. [2020-12-22 09:52:16,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:52:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 19442 states and 26150 transitions. [2020-12-22 09:52:16,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:52:16,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:16,353 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:16,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 09:52:16,353 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:16,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:52:16,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:16,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357215213] [2020-12-22 09:52:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:16,957 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:52:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:17,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357215213] [2020-12-22 09:52:17,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705098149] [2020-12-22 09:52:17,236 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 09:52:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:17,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:52:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:52:18,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:18,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:52:18,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327265098] [2020-12-22 09:52:18,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:52:18,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:18,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:52:18,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:52:18,322 INFO L87 Difference]: Start difference. First operand 19442 states and 26150 transitions. Second operand 15 states. [2020-12-22 09:52:18,562 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:52:19,057 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-12-22 09:52:19,440 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:52:19,869 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:52:20,152 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:52:20,721 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:52:21,178 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:52:21,701 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:52:22,021 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:52:22,352 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:52:22,799 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:52:23,099 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:52:23,419 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:52:24,528 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:52:25,333 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:52:25,676 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:52:26,041 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:52:26,579 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:52:26,894 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:52:27,162 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27