/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:13:31,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:13:31,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:13:31,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:13:31,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:13:31,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:13:31,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:13:31,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:13:31,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:13:31,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:13:31,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:13:31,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:13:31,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:13:31,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:13:31,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:13:31,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:13:31,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:13:31,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:13:31,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:13:31,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:13:31,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:13:31,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:13:31,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:13:31,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:13:31,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 10:13:31,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 10:13:31,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 10:13:31,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 10:13:31,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 10:13:31,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 10:13:31,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:13:31,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:13:31,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:13:31,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:13:31,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:13:31,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:13:31,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:13:31,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:13:31,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:13:31,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:13:31,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:13:31,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:13:31,788 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:13:31,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:13:31,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:13:31,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:13:31,790 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:13:31,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:13:31,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:13:31,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:13:31,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:13:31,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:13:31,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:13:31,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:13:31,792 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:13:31,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:13:31,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:13:31,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:13:31,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:13:31,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:13:31,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:13:31,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:13:31,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:13:31,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:13:31,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:13:31,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:13:31,795 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:13:31,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:13:32,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:13:32,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:13:32,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:13:32,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:13:32,185 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:13:32,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label06.c [2020-12-22 10:13:32,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74fa7b8f2/822137ab235b4764bb2aa3bd40ff7202/FLAG9881d4d1f [2020-12-22 10:13:33,289 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:13:33,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label06.c [2020-12-22 10:13:33,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74fa7b8f2/822137ab235b4764bb2aa3bd40ff7202/FLAG9881d4d1f [2020-12-22 10:13:33,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74fa7b8f2/822137ab235b4764bb2aa3bd40ff7202 [2020-12-22 10:13:33,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:13:33,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:13:33,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:33,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:13:33,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:13:33,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:33" (1/1) ... [2020-12-22 10:13:33,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b9c6b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:33, skipping insertion in model container [2020-12-22 10:13:33,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:33" (1/1) ... [2020-12-22 10:13:33,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:13:33,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:13:34,510 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label06.c[20544,20557] [2020-12-22 10:13:34,541 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label06.c[23118,23131] [2020-12-22 10:13:35,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:35,425 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:13:35,527 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label06.c[20544,20557] [2020-12-22 10:13:35,549 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label06.c[23118,23131] [2020-12-22 10:13:36,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:36,325 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:13:36,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36 WrapperNode [2020-12-22 10:13:36,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:36,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:36,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:13:36,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:13:36,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... [2020-12-22 10:13:36,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... [2020-12-22 10:13:36,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:36,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:13:36,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:13:36,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:13:36,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... [2020-12-22 10:13:36,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... [2020-12-22 10:13:37,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... [2020-12-22 10:13:37,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... [2020-12-22 10:13:37,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... [2020-12-22 10:13:37,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... [2020-12-22 10:13:37,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... [2020-12-22 10:13:37,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:13:37,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:13:37,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:13:37,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:13:37,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:13:37,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:13:37,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:13:37,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:13:37,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:13:42,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:13:42,786 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:13:42,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:42 BoogieIcfgContainer [2020-12-22 10:13:42,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:13:42,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:13:42,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:13:42,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:13:42,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:13:33" (1/3) ... [2020-12-22 10:13:42,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6aabbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:42, skipping insertion in model container [2020-12-22 10:13:42,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:36" (2/3) ... [2020-12-22 10:13:42,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6aabbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:42, skipping insertion in model container [2020-12-22 10:13:42,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:42" (3/3) ... [2020-12-22 10:13:42,799 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label06.c [2020-12-22 10:13:42,806 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:13:42,812 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:13:42,832 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:13:42,867 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:13:42,868 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:13:42,868 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:13:42,868 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:13:42,868 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:13:42,868 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:13:42,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:13:42,869 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:13:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:13:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:13:42,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:42,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:42,916 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1303430997, now seen corresponding path program 1 times [2020-12-22 10:13:42,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:42,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954782348] [2020-12-22 10:13:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:43,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954782348] [2020-12-22 10:13:43,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:43,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:13:43,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127610198] [2020-12-22 10:13:43,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:43,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:43,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:43,282 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 3 states. [2020-12-22 10:13:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:49,281 INFO L93 Difference]: Finished difference Result 2587 states and 4966 transitions. [2020-12-22 10:13:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:49,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 10:13:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:49,321 INFO L225 Difference]: With dead ends: 2587 [2020-12-22 10:13:49,322 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:13:49,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:13:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:13:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:13:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2560 transitions. [2020-12-22 10:13:49,482 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2560 transitions. Word has length 24 [2020-12-22 10:13:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:49,483 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2560 transitions. [2020-12-22 10:13:49,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2560 transitions. [2020-12-22 10:13:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:13:49,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:49,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:49,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:13:49,487 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:49,487 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:13:49,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:49,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668929035] [2020-12-22 10:13:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:49,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668929035] [2020-12-22 10:13:49,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:49,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:49,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136288100] [2020-12-22 10:13:49,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:13:49,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:49,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:13:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:13:49,623 INFO L87 Difference]: Start difference. First operand 1629 states and 2560 transitions. Second operand 5 states. [2020-12-22 10:13:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:49,751 INFO L93 Difference]: Finished difference Result 1701 states and 2672 transitions. [2020-12-22 10:13:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:13:49,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:13:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:49,761 INFO L225 Difference]: With dead ends: 1701 [2020-12-22 10:13:49,761 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:13:49,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:13:49,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:13:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:13:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:13:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2510 transitions. [2020-12-22 10:13:49,807 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2510 transitions. Word has length 42 [2020-12-22 10:13:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:49,808 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2510 transitions. [2020-12-22 10:13:49,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:13:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2510 transitions. [2020-12-22 10:13:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:49,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:49,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:49,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:13:49,813 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:49,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:13:49,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:49,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543685543] [2020-12-22 10:13:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:50,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543685543] [2020-12-22 10:13:50,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:50,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:50,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363094934] [2020-12-22 10:13:50,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:50,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:50,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:50,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:50,048 INFO L87 Difference]: Start difference. First operand 1629 states and 2510 transitions. Second operand 3 states. [2020-12-22 10:13:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:50,102 INFO L93 Difference]: Finished difference Result 1759 states and 2716 transitions. [2020-12-22 10:13:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:50,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:50,114 INFO L225 Difference]: With dead ends: 1759 [2020-12-22 10:13:50,115 INFO L226 Difference]: Without dead ends: 1691 [2020-12-22 10:13:50,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2020-12-22 10:13:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1689. [2020-12-22 10:13:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1689 states. [2020-12-22 10:13:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2606 transitions. [2020-12-22 10:13:50,176 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2606 transitions. Word has length 91 [2020-12-22 10:13:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:50,178 INFO L481 AbstractCegarLoop]: Abstraction has 1689 states and 2606 transitions. [2020-12-22 10:13:50,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2606 transitions. [2020-12-22 10:13:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:50,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:50,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:50,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:13:50,185 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:50,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:50,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:13:50,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:50,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521812638] [2020-12-22 10:13:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:50,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521812638] [2020-12-22 10:13:50,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:50,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:50,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919716400] [2020-12-22 10:13:50,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:50,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:50,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:50,366 INFO L87 Difference]: Start difference. First operand 1689 states and 2606 transitions. Second operand 3 states. [2020-12-22 10:13:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:50,476 INFO L93 Difference]: Finished difference Result 1933 states and 2994 transitions. [2020-12-22 10:13:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:50,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:50,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:50,487 INFO L225 Difference]: With dead ends: 1933 [2020-12-22 10:13:50,488 INFO L226 Difference]: Without dead ends: 1805 [2020-12-22 10:13:50,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2020-12-22 10:13:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1803. [2020-12-22 10:13:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1803 states. [2020-12-22 10:13:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2787 transitions. [2020-12-22 10:13:50,542 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2787 transitions. Word has length 91 [2020-12-22 10:13:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:50,543 INFO L481 AbstractCegarLoop]: Abstraction has 1803 states and 2787 transitions. [2020-12-22 10:13:50,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2787 transitions. [2020-12-22 10:13:50,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:50,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:50,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:50,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:13:50,547 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:50,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:50,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:13:50,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:50,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873144076] [2020-12-22 10:13:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:50,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873144076] [2020-12-22 10:13:50,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:50,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:50,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849412601] [2020-12-22 10:13:50,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:50,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:50,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:50,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:50,710 INFO L87 Difference]: Start difference. First operand 1803 states and 2787 transitions. Second operand 3 states. [2020-12-22 10:13:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:50,771 INFO L93 Difference]: Finished difference Result 2263 states and 3517 transitions. [2020-12-22 10:13:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:50,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:50,785 INFO L225 Difference]: With dead ends: 2263 [2020-12-22 10:13:50,786 INFO L226 Difference]: Without dead ends: 2021 [2020-12-22 10:13:50,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2020-12-22 10:13:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 2019. [2020-12-22 10:13:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2019 states. [2020-12-22 10:13:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3127 transitions. [2020-12-22 10:13:50,849 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3127 transitions. Word has length 91 [2020-12-22 10:13:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:50,850 INFO L481 AbstractCegarLoop]: Abstraction has 2019 states and 3127 transitions. [2020-12-22 10:13:50,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3127 transitions. [2020-12-22 10:13:50,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:50,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:50,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:50,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:13:50,855 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:13:50,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:50,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005310969] [2020-12-22 10:13:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:50,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005310969] [2020-12-22 10:13:50,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:50,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:50,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834843049] [2020-12-22 10:13:50,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:50,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:50,980 INFO L87 Difference]: Start difference. First operand 2019 states and 3127 transitions. Second operand 3 states. [2020-12-22 10:13:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:51,041 INFO L93 Difference]: Finished difference Result 2887 states and 4497 transitions. [2020-12-22 10:13:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:51,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:51,055 INFO L225 Difference]: With dead ends: 2887 [2020-12-22 10:13:51,055 INFO L226 Difference]: Without dead ends: 2429 [2020-12-22 10:13:51,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2020-12-22 10:13:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2427. [2020-12-22 10:13:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2427 states. [2020-12-22 10:13:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3763 transitions. [2020-12-22 10:13:51,131 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3763 transitions. Word has length 91 [2020-12-22 10:13:51,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:51,133 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 3763 transitions. [2020-12-22 10:13:51,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3763 transitions. [2020-12-22 10:13:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:51,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:51,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:51,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:13:51,142 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:51,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:13:51,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:51,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331422261] [2020-12-22 10:13:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:51,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331422261] [2020-12-22 10:13:51,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:51,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:51,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009943365] [2020-12-22 10:13:51,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:51,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:51,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:51,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:51,249 INFO L87 Difference]: Start difference. First operand 2427 states and 3763 transitions. Second operand 3 states. [2020-12-22 10:13:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:51,334 INFO L93 Difference]: Finished difference Result 4063 states and 6325 transitions. [2020-12-22 10:13:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:51,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:51,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:51,353 INFO L225 Difference]: With dead ends: 4063 [2020-12-22 10:13:51,353 INFO L226 Difference]: Without dead ends: 3197 [2020-12-22 10:13:51,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2020-12-22 10:13:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3195. [2020-12-22 10:13:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3195 states. [2020-12-22 10:13:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4947 transitions. [2020-12-22 10:13:51,466 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4947 transitions. Word has length 91 [2020-12-22 10:13:51,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:51,466 INFO L481 AbstractCegarLoop]: Abstraction has 3195 states and 4947 transitions. [2020-12-22 10:13:51,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4947 transitions. [2020-12-22 10:13:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:51,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:51,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:51,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:13:51,468 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:13:51,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:51,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871251516] [2020-12-22 10:13:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:51,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871251516] [2020-12-22 10:13:51,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:51,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:51,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926007473] [2020-12-22 10:13:51,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:51,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:51,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:51,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:51,646 INFO L87 Difference]: Start difference. First operand 3195 states and 4947 transitions. Second operand 9 states. [2020-12-22 10:13:52,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:52,927 INFO L93 Difference]: Finished difference Result 26071 states and 40577 transitions. [2020-12-22 10:13:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:13:52,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:13:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:53,047 INFO L225 Difference]: With dead ends: 26071 [2020-12-22 10:13:53,047 INFO L226 Difference]: Without dead ends: 24437 [2020-12-22 10:13:53,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:13:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24437 states. [2020-12-22 10:13:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24437 to 4827. [2020-12-22 10:13:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4827 states. [2020-12-22 10:13:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 7427 transitions. [2020-12-22 10:13:53,630 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 7427 transitions. Word has length 91 [2020-12-22 10:13:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:53,631 INFO L481 AbstractCegarLoop]: Abstraction has 4827 states and 7427 transitions. [2020-12-22 10:13:53,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 7427 transitions. [2020-12-22 10:13:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:53,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:53,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:53,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:13:53,633 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:13:53,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:53,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769792403] [2020-12-22 10:13:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:53,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769792403] [2020-12-22 10:13:53,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:53,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:53,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856494897] [2020-12-22 10:13:53,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:53,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:53,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:53,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:53,738 INFO L87 Difference]: Start difference. First operand 4827 states and 7427 transitions. Second operand 3 states. [2020-12-22 10:13:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:54,100 INFO L93 Difference]: Finished difference Result 9649 states and 14839 transitions. [2020-12-22 10:13:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:54,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:54,116 INFO L225 Difference]: With dead ends: 9649 [2020-12-22 10:13:54,116 INFO L226 Difference]: Without dead ends: 6383 [2020-12-22 10:13:54,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-12-22 10:13:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6381. [2020-12-22 10:13:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6381 states. [2020-12-22 10:13:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 9765 transitions. [2020-12-22 10:13:54,481 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 9765 transitions. Word has length 93 [2020-12-22 10:13:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:54,481 INFO L481 AbstractCegarLoop]: Abstraction has 6381 states and 9765 transitions. [2020-12-22 10:13:54,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 9765 transitions. [2020-12-22 10:13:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:54,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:54,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:54,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:13:54,483 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:54,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:54,484 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:13:54,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:54,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805534406] [2020-12-22 10:13:54,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:54,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805534406] [2020-12-22 10:13:54,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:54,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:54,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050751271] [2020-12-22 10:13:54,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:54,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:54,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:54,849 INFO L87 Difference]: Start difference. First operand 6381 states and 9765 transitions. Second operand 9 states. [2020-12-22 10:13:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:55,575 INFO L93 Difference]: Finished difference Result 11201 states and 17127 transitions. [2020-12-22 10:13:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:55,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:13:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:55,590 INFO L225 Difference]: With dead ends: 11201 [2020-12-22 10:13:55,591 INFO L226 Difference]: Without dead ends: 6383 [2020-12-22 10:13:55,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:13:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-12-22 10:13:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6381. [2020-12-22 10:13:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6381 states. [2020-12-22 10:13:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 9717 transitions. [2020-12-22 10:13:55,936 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 9717 transitions. Word has length 93 [2020-12-22 10:13:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:55,937 INFO L481 AbstractCegarLoop]: Abstraction has 6381 states and 9717 transitions. [2020-12-22 10:13:55,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 9717 transitions. [2020-12-22 10:13:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:55,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:55,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:55,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:13:55,938 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:55,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:13:55,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:55,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641006328] [2020-12-22 10:13:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:56,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641006328] [2020-12-22 10:13:56,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:56,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:56,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624246072] [2020-12-22 10:13:56,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:56,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:56,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:56,017 INFO L87 Difference]: Start difference. First operand 6381 states and 9717 transitions. Second operand 3 states. [2020-12-22 10:13:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:56,514 INFO L93 Difference]: Finished difference Result 15441 states and 23383 transitions. [2020-12-22 10:13:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:56,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:56,538 INFO L225 Difference]: With dead ends: 15441 [2020-12-22 10:13:56,538 INFO L226 Difference]: Without dead ends: 10623 [2020-12-22 10:13:56,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:56,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10623 states. [2020-12-22 10:13:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10623 to 10621. [2020-12-22 10:13:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10621 states. [2020-12-22 10:13:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10621 states to 10621 states and 15973 transitions. [2020-12-22 10:13:57,216 INFO L78 Accepts]: Start accepts. Automaton has 10621 states and 15973 transitions. Word has length 93 [2020-12-22 10:13:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:57,217 INFO L481 AbstractCegarLoop]: Abstraction has 10621 states and 15973 transitions. [2020-12-22 10:13:57,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10621 states and 15973 transitions. [2020-12-22 10:13:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:57,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:57,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:57,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:13:57,219 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:13:57,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:57,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264786203] [2020-12-22 10:13:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:57,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264786203] [2020-12-22 10:13:57,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:57,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:57,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846811728] [2020-12-22 10:13:57,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:57,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:57,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:57,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:57,293 INFO L87 Difference]: Start difference. First operand 10621 states and 15973 transitions. Second operand 3 states. [2020-12-22 10:13:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:58,176 INFO L93 Difference]: Finished difference Result 27585 states and 41191 transitions. [2020-12-22 10:13:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:58,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:58,218 INFO L225 Difference]: With dead ends: 27585 [2020-12-22 10:13:58,218 INFO L226 Difference]: Without dead ends: 18527 [2020-12-22 10:13:58,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18527 states. [2020-12-22 10:13:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18527 to 18525. [2020-12-22 10:13:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18525 states. [2020-12-22 10:13:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 27429 transitions. [2020-12-22 10:13:59,643 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 27429 transitions. Word has length 93 [2020-12-22 10:13:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:59,643 INFO L481 AbstractCegarLoop]: Abstraction has 18525 states and 27429 transitions. [2020-12-22 10:13:59,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 27429 transitions. [2020-12-22 10:13:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:59,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:59,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:59,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:13:59,646 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:13:59,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:59,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037490695] [2020-12-22 10:13:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:59,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037490695] [2020-12-22 10:13:59,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:59,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:59,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611638956] [2020-12-22 10:13:59,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:13:59,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:13:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:59,770 INFO L87 Difference]: Start difference. First operand 18525 states and 27429 transitions. Second operand 6 states. [2020-12-22 10:14:01,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:01,052 INFO L93 Difference]: Finished difference Result 35487 states and 52454 transitions. [2020-12-22 10:14:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:14:01,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:14:01,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:01,094 INFO L225 Difference]: With dead ends: 35487 [2020-12-22 10:14:01,094 INFO L226 Difference]: Without dead ends: 18525 [2020-12-22 10:14:01,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18525 states. [2020-12-22 10:14:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18525 to 18525. [2020-12-22 10:14:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18525 states. [2020-12-22 10:14:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 27173 transitions. [2020-12-22 10:14:02,180 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 27173 transitions. Word has length 94 [2020-12-22 10:14:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:02,181 INFO L481 AbstractCegarLoop]: Abstraction has 18525 states and 27173 transitions. [2020-12-22 10:14:02,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:14:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 27173 transitions. [2020-12-22 10:14:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:14:02,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:02,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:02,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:14:02,183 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:14:02,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:02,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944906621] [2020-12-22 10:14:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:02,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944906621] [2020-12-22 10:14:02,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:02,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:14:02,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762435398] [2020-12-22 10:14:02,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:14:02,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:02,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:14:02,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:14:02,283 INFO L87 Difference]: Start difference. First operand 18525 states and 27173 transitions. Second operand 6 states. [2020-12-22 10:14:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:03,328 INFO L93 Difference]: Finished difference Result 35487 states and 51942 transitions. [2020-12-22 10:14:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:14:03,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:14:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:03,366 INFO L225 Difference]: With dead ends: 35487 [2020-12-22 10:14:03,366 INFO L226 Difference]: Without dead ends: 18525 [2020-12-22 10:14:03,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18525 states. [2020-12-22 10:14:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18525 to 18525. [2020-12-22 10:14:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18525 states. [2020-12-22 10:14:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 26981 transitions. [2020-12-22 10:14:04,389 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 26981 transitions. Word has length 94 [2020-12-22 10:14:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:04,389 INFO L481 AbstractCegarLoop]: Abstraction has 18525 states and 26981 transitions. [2020-12-22 10:14:04,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:14:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 26981 transitions. [2020-12-22 10:14:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:14:04,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:04,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:04,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:14:04,391 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:14:04,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:04,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108735360] [2020-12-22 10:14:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:04,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108735360] [2020-12-22 10:14:04,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:04,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:14:04,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246723650] [2020-12-22 10:14:04,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:14:04,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:04,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:14:04,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:14:04,510 INFO L87 Difference]: Start difference. First operand 18525 states and 26981 transitions. Second operand 8 states. [2020-12-22 10:14:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:06,556 INFO L93 Difference]: Finished difference Result 33024 states and 47631 transitions. [2020-12-22 10:14:06,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:14:06,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:14:06,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:06,625 INFO L225 Difference]: With dead ends: 33024 [2020-12-22 10:14:06,625 INFO L226 Difference]: Without dead ends: 33022 [2020-12-22 10:14:06,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33022 states. [2020-12-22 10:14:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33022 to 19293. [2020-12-22 10:14:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19293 states. [2020-12-22 10:14:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19293 states to 19293 states and 27685 transitions. [2020-12-22 10:14:08,195 INFO L78 Accepts]: Start accepts. Automaton has 19293 states and 27685 transitions. Word has length 94 [2020-12-22 10:14:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:08,196 INFO L481 AbstractCegarLoop]: Abstraction has 19293 states and 27685 transitions. [2020-12-22 10:14:08,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:14:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 19293 states and 27685 transitions. [2020-12-22 10:14:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:14:08,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:08,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:08,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:14:08,198 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1754479322, now seen corresponding path program 1 times [2020-12-22 10:14:08,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:08,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767462953] [2020-12-22 10:14:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:08,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767462953] [2020-12-22 10:14:08,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384321503] [2020-12-22 10:14:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:14:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:08,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 10:14:08,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:14:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:08,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:14:08,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 10:14:08,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236557616] [2020-12-22 10:14:08,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:08,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:08,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:14:08,745 INFO L87 Difference]: Start difference. First operand 19293 states and 27685 transitions. Second operand 3 states. [2020-12-22 10:14:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:15,367 INFO L93 Difference]: Finished difference Result 22299 states and 32372 transitions. [2020-12-22 10:14:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:15,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:14:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:15,399 INFO L225 Difference]: With dead ends: 22299 [2020-12-22 10:14:15,399 INFO L226 Difference]: Without dead ends: 20795 [2020-12-22 10:14:15,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:14:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20795 states. [2020-12-22 10:14:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20795 to 20795. [2020-12-22 10:14:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20795 states. [2020-12-22 10:14:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20795 states to 20795 states and 29763 transitions. [2020-12-22 10:14:16,593 INFO L78 Accepts]: Start accepts. Automaton has 20795 states and 29763 transitions. Word has length 95 [2020-12-22 10:14:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:16,594 INFO L481 AbstractCegarLoop]: Abstraction has 20795 states and 29763 transitions. [2020-12-22 10:14:16,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 20795 states and 29763 transitions. [2020-12-22 10:14:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 10:14:16,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:16,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:16,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 10:14:16,811 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash 315341663, now seen corresponding path program 1 times [2020-12-22 10:14:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:16,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658342193] [2020-12-22 10:14:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:16,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658342193] [2020-12-22 10:14:16,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:16,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:14:16,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832921364] [2020-12-22 10:14:16,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:16,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:16,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:16,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:16,891 INFO L87 Difference]: Start difference. First operand 20795 states and 29763 transitions. Second operand 3 states. [2020-12-22 10:14:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:23,814 INFO L93 Difference]: Finished difference Result 26805 states and 38606 transitions. [2020-12-22 10:14:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:23,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 10:14:23,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:23,843 INFO L225 Difference]: With dead ends: 26805 [2020-12-22 10:14:23,843 INFO L226 Difference]: Without dead ends: 23799 [2020-12-22 10:14:23,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23799 states. [2020-12-22 10:14:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23799 to 23799. [2020-12-22 10:14:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23799 states. [2020-12-22 10:14:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23799 states to 23799 states and 33271 transitions. [2020-12-22 10:14:25,054 INFO L78 Accepts]: Start accepts. Automaton has 23799 states and 33271 transitions. Word has length 97 [2020-12-22 10:14:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:25,055 INFO L481 AbstractCegarLoop]: Abstraction has 23799 states and 33271 transitions. [2020-12-22 10:14:25,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 23799 states and 33271 transitions. [2020-12-22 10:14:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 10:14:25,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:25,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:25,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:14:25,056 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1433384855, now seen corresponding path program 1 times [2020-12-22 10:14:25,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:25,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631976416] [2020-12-22 10:14:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:25,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631976416] [2020-12-22 10:14:25,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:25,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:25,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859234372] [2020-12-22 10:14:25,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:14:25,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:14:25,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:14:25,165 INFO L87 Difference]: Start difference. First operand 23799 states and 33271 transitions. Second operand 4 states. [2020-12-22 10:14:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:34,755 INFO L93 Difference]: Finished difference Result 30560 states and 42000 transitions. [2020-12-22 10:14:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:14:34,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-12-22 10:14:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:34,780 INFO L225 Difference]: With dead ends: 30560 [2020-12-22 10:14:34,780 INFO L226 Difference]: Without dead ends: 24550 [2020-12-22 10:14:34,787 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 10:14:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24550 states. [2020-12-22 10:14:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24550 to 24550. [2020-12-22 10:14:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24550 states. [2020-12-22 10:14:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24550 states to 24550 states and 33908 transitions. [2020-12-22 10:14:36,088 INFO L78 Accepts]: Start accepts. Automaton has 24550 states and 33908 transitions. Word has length 101 [2020-12-22 10:14:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:36,089 INFO L481 AbstractCegarLoop]: Abstraction has 24550 states and 33908 transitions. [2020-12-22 10:14:36,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:14:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 24550 states and 33908 transitions. [2020-12-22 10:14:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:36,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:36,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:36,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:14:36,101 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:14:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:36,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158013439] [2020-12-22 10:14:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:14:36,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158013439] [2020-12-22 10:14:36,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:36,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:36,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052445098] [2020-12-22 10:14:36,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:36,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:36,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:36,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:36,278 INFO L87 Difference]: Start difference. First operand 24550 states and 33908 transitions. Second operand 9 states. [2020-12-22 10:14:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:43,578 INFO L93 Difference]: Finished difference Result 152118 states and 215644 transitions. [2020-12-22 10:14:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:43,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:43,727 INFO L225 Difference]: With dead ends: 152118 [2020-12-22 10:14:43,727 INFO L226 Difference]: Without dead ends: 134388 [2020-12-22 10:14:43,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134388 states. [2020-12-22 10:14:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134388 to 42278. [2020-12-22 10:14:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42278 states. [2020-12-22 10:14:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42278 states to 42278 states and 58996 transitions. [2020-12-22 10:14:46,883 INFO L78 Accepts]: Start accepts. Automaton has 42278 states and 58996 transitions. Word has length 130 [2020-12-22 10:14:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:46,883 INFO L481 AbstractCegarLoop]: Abstraction has 42278 states and 58996 transitions. [2020-12-22 10:14:46,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 42278 states and 58996 transitions. [2020-12-22 10:14:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:46,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:46,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:46,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:14:46,899 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:46,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:14:46,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:46,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209620654] [2020-12-22 10:14:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:14:47,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209620654] [2020-12-22 10:14:47,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:47,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:47,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428890724] [2020-12-22 10:14:47,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:47,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:47,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:47,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:47,077 INFO L87 Difference]: Start difference. First operand 42278 states and 58996 transitions. Second operand 9 states. [2020-12-22 10:14:57,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:57,106 INFO L93 Difference]: Finished difference Result 169846 states and 240732 transitions. [2020-12-22 10:14:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:57,107 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:57,277 INFO L225 Difference]: With dead ends: 169846 [2020-12-22 10:14:57,277 INFO L226 Difference]: Without dead ends: 152116 [2020-12-22 10:14:57,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152116 states. [2020-12-22 10:15:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152116 to 68902. [2020-12-22 10:15:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68902 states. [2020-12-22 10:15:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68902 states to 68902 states and 96468 transitions. [2020-12-22 10:15:02,975 INFO L78 Accepts]: Start accepts. Automaton has 68902 states and 96468 transitions. Word has length 130 [2020-12-22 10:15:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:02,976 INFO L481 AbstractCegarLoop]: Abstraction has 68902 states and 96468 transitions. [2020-12-22 10:15:02,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 68902 states and 96468 transitions. [2020-12-22 10:15:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:02,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:02,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:02,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:15:02,991 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:02,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:15:02,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:02,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082011264] [2020-12-22 10:15:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:15:03,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082011264] [2020-12-22 10:15:03,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:03,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:03,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470582972] [2020-12-22 10:15:03,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:03,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:03,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:03,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:03,200 INFO L87 Difference]: Start difference. First operand 68902 states and 96468 transitions. Second operand 9 states. [2020-12-22 10:15:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:15,304 INFO L93 Difference]: Finished difference Result 187574 states and 265820 transitions. [2020-12-22 10:15:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:15,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:15,491 INFO L225 Difference]: With dead ends: 187574 [2020-12-22 10:15:15,491 INFO L226 Difference]: Without dead ends: 169844 [2020-12-22 10:15:15,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:15,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169844 states. [2020-12-22 10:15:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169844 to 86630. [2020-12-22 10:15:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86630 states. [2020-12-22 10:15:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86630 states to 86630 states and 121556 transitions. [2020-12-22 10:15:22,958 INFO L78 Accepts]: Start accepts. Automaton has 86630 states and 121556 transitions. Word has length 130 [2020-12-22 10:15:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:22,958 INFO L481 AbstractCegarLoop]: Abstraction has 86630 states and 121556 transitions. [2020-12-22 10:15:22,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 86630 states and 121556 transitions. [2020-12-22 10:15:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:22,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:22,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:22,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:15:22,975 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:15:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:22,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062199788] [2020-12-22 10:15:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:15:23,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062199788] [2020-12-22 10:15:23,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:23,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:23,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355874472] [2020-12-22 10:15:23,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:23,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:23,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:23,164 INFO L87 Difference]: Start difference. First operand 86630 states and 121556 transitions. Second operand 9 states. [2020-12-22 10:15:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:37,312 INFO L93 Difference]: Finished difference Result 205302 states and 290908 transitions. [2020-12-22 10:15:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:37,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:37,712 INFO L225 Difference]: With dead ends: 205302 [2020-12-22 10:15:37,712 INFO L226 Difference]: Without dead ends: 187572 [2020-12-22 10:15:37,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187572 states. [2020-12-22 10:15:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187572 to 104358. [2020-12-22 10:15:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104358 states. [2020-12-22 10:15:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104358 states to 104358 states and 146644 transitions. [2020-12-22 10:15:46,762 INFO L78 Accepts]: Start accepts. Automaton has 104358 states and 146644 transitions. Word has length 130 [2020-12-22 10:15:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:46,763 INFO L481 AbstractCegarLoop]: Abstraction has 104358 states and 146644 transitions. [2020-12-22 10:15:46,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 104358 states and 146644 transitions. [2020-12-22 10:15:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:46,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:46,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:46,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:15:46,777 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:15:46,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:46,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197723221] [2020-12-22 10:15:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:15:47,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197723221] [2020-12-22 10:15:47,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:47,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:47,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644162948] [2020-12-22 10:15:47,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:47,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:47,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:47,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:47,131 INFO L87 Difference]: Start difference. First operand 104358 states and 146644 transitions. Second operand 9 states. [2020-12-22 10:16:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:04,204 INFO L93 Difference]: Finished difference Result 223030 states and 315996 transitions. [2020-12-22 10:16:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:04,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:04,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:04,660 INFO L225 Difference]: With dead ends: 223030 [2020-12-22 10:16:04,660 INFO L226 Difference]: Without dead ends: 205300 [2020-12-22 10:16:04,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:04,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205300 states. [2020-12-22 10:16:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205300 to 122086. [2020-12-22 10:16:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122086 states. [2020-12-22 10:16:15,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122086 states to 122086 states and 171732 transitions. [2020-12-22 10:16:15,793 INFO L78 Accepts]: Start accepts. Automaton has 122086 states and 171732 transitions. Word has length 130 [2020-12-22 10:16:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:15,794 INFO L481 AbstractCegarLoop]: Abstraction has 122086 states and 171732 transitions. [2020-12-22 10:16:15,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 122086 states and 171732 transitions. [2020-12-22 10:16:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:15,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:15,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:15,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:16:15,817 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:15,818 INFO L82 PathProgramCache]: Analyzing trace with hash -403461309, now seen corresponding path program 1 times [2020-12-22 10:16:15,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:15,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855123975] [2020-12-22 10:16:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:16:16,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855123975] [2020-12-22 10:16:16,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:16,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:16,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520792544] [2020-12-22 10:16:16,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:16,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:16,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:16,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:16,230 INFO L87 Difference]: Start difference. First operand 122086 states and 171732 transitions. Second operand 9 states. [2020-12-22 10:16:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:36,640 INFO L93 Difference]: Finished difference Result 240758 states and 341084 transitions. [2020-12-22 10:16:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:36,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:36,937 INFO L225 Difference]: With dead ends: 240758 [2020-12-22 10:16:36,938 INFO L226 Difference]: Without dead ends: 223028 [2020-12-22 10:16:36,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223028 states. [2020-12-22 10:16:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223028 to 139814. [2020-12-22 10:16:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139814 states. [2020-12-22 10:16:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139814 states to 139814 states and 196820 transitions. [2020-12-22 10:16:50,931 INFO L78 Accepts]: Start accepts. Automaton has 139814 states and 196820 transitions. Word has length 130 [2020-12-22 10:16:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:50,931 INFO L481 AbstractCegarLoop]: Abstraction has 139814 states and 196820 transitions. [2020-12-22 10:16:50,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 139814 states and 196820 transitions. [2020-12-22 10:16:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:51,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:51,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:51,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:16:51,202 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:51,204 INFO L82 PathProgramCache]: Analyzing trace with hash -214245533, now seen corresponding path program 1 times [2020-12-22 10:16:51,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:51,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645011122] [2020-12-22 10:16:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:16:51,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645011122] [2020-12-22 10:16:51,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:51,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:51,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657598390] [2020-12-22 10:16:51,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:51,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:51,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:51,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:51,420 INFO L87 Difference]: Start difference. First operand 139814 states and 196820 transitions. Second operand 9 states. [2020-12-22 10:17:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:14,953 INFO L93 Difference]: Finished difference Result 247606 states and 350940 transitions. [2020-12-22 10:17:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:14,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:17:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:15,442 INFO L225 Difference]: With dead ends: 247606 [2020-12-22 10:17:15,442 INFO L226 Difference]: Without dead ends: 235316 [2020-12-22 10:17:15,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:15,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235316 states.