./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f299e5c87ef8b927f907740b52cd3b6a05ddc6197a3b61da31c7c3837813d6c6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:37:55,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:37:55,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:37:55,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:37:55,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:37:55,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:37:55,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:37:55,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:37:55,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:37:55,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:37:55,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:37:55,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:37:55,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:37:55,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:37:55,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:37:55,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:37:55,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:37:55,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:37:55,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:37:55,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:37:55,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:37:55,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:37:55,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:37:55,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:37:55,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:37:55,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:37:55,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:37:55,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:37:55,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:37:55,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:37:55,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:37:55,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:37:55,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:37:55,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:37:55,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:37:55,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:37:55,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:37:55,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:37:55,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:37:55,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:37:55,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:37:55,713 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:37:55,745 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:37:55,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:37:55,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:37:55,747 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:37:55,748 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:37:55,748 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:37:55,749 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:37:55,749 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:37:55,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:37:55,750 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:37:55,750 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:37:55,750 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:37:55,751 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:37:55,751 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:37:55,752 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:37:55,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:37:55,753 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:37:55,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:37:55,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:37:55,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:37:55,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:37:55,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:37:55,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:37:55,756 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:37:55,756 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:37:55,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:37:55,757 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:37:55,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:37:55,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:37:55,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:37:55,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:55,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:37:55,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:37:55,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:37:55,760 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:37:55,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:37:55,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:37:55,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:37:55,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:37:55,762 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f299e5c87ef8b927f907740b52cd3b6a05ddc6197a3b61da31c7c3837813d6c6 [2021-11-07 01:37:56,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:37:56,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:37:56,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:37:56,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:37:56,116 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:37:56,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-07 01:37:56,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/data/7a73c30a2/aac14c59e7a84848b197b3b44c87b072/FLAG0fad3a582 [2021-11-07 01:37:56,887 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:37:56,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-07 01:37:56,910 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/data/7a73c30a2/aac14c59e7a84848b197b3b44c87b072/FLAG0fad3a582 [2021-11-07 01:37:57,124 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/data/7a73c30a2/aac14c59e7a84848b197b3b44c87b072 [2021-11-07 01:37:57,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:37:57,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:37:57,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:57,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:37:57,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:37:57,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:57" (1/1) ... [2021-11-07 01:37:57,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39599324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:57, skipping insertion in model container [2021-11-07 01:37:57,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:57" (1/1) ... [2021-11-07 01:37:57,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:37:57,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:57,663 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2021-11-07 01:37:57,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:57,843 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:37:57,967 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2021-11-07 01:37:58,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:58,077 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:37:58,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58 WrapperNode [2021-11-07 01:37:58,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:58,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:58,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:37:58,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:37:58,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:58,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:37:58,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:37:58,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:37:58,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:37:58,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:37:58,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:37:58,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:37:58,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (1/1) ... [2021-11-07 01:37:58,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:58,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:58,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:37:58,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c19bb1f2-8209-4764-a3c1-76ebf175c334/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:37:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:37:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:37:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:37:58,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:38:00,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:38:00,331 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:38:00,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:00 BoogieIcfgContainer [2021-11-07 01:38:00,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:38:00,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:38:00,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:38:00,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:38:00,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:37:57" (1/3) ... [2021-11-07 01:38:00,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444ef56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:00, skipping insertion in model container [2021-11-07 01:38:00,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:58" (2/3) ... [2021-11-07 01:38:00,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444ef56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:38:00, skipping insertion in model container [2021-11-07 01:38:00,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:38:00" (3/3) ... [2021-11-07 01:38:00,345 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-07 01:38:00,351 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:38:00,352 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:38:00,405 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:38:00,412 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:38:00,413 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:38:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 184 states have (on average 1.7119565217391304) internal successors, (315), 185 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:38:00,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:00,451 INFO L513 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] [2021-11-07 01:38:00,452 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:00,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1437980373, now seen corresponding path program 1 times [2021-11-07 01:38:00,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:00,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889089021] [2021-11-07 01:38:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:00,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:01,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:01,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889089021] [2021-11-07 01:38:01,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889089021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:01,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:01,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 01:38:01,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371380338] [2021-11-07 01:38:01,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:38:01,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:01,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:38:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:38:01,249 INFO L87 Difference]: Start difference. First operand has 186 states, 184 states have (on average 1.7119565217391304) internal successors, (315), 185 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:01,787 INFO L93 Difference]: Finished difference Result 736 states and 1182 transitions. [2021-11-07 01:38:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:38:01,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:38:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:01,816 INFO L225 Difference]: With dead ends: 736 [2021-11-07 01:38:01,817 INFO L226 Difference]: Without dead ends: 630 [2021-11-07 01:38:01,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:38:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-07 01:38:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 620. [2021-11-07 01:38:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 1.4168012924071083) internal successors, (877), 619 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 877 transitions. [2021-11-07 01:38:01,932 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 877 transitions. Word has length 80 [2021-11-07 01:38:01,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:01,933 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 877 transitions. [2021-11-07 01:38:01,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 877 transitions. [2021-11-07 01:38:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:38:01,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:01,939 INFO L513 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] [2021-11-07 01:38:01,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:38:01,940 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash 481584325, now seen corresponding path program 1 times [2021-11-07 01:38:01,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:01,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421671159] [2021-11-07 01:38:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:01,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:02,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:02,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421671159] [2021-11-07 01:38:02,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421671159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:02,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:02,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:38:02,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182404282] [2021-11-07 01:38:02,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:38:02,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:38:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:38:02,094 INFO L87 Difference]: Start difference. First operand 620 states and 877 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:02,497 INFO L93 Difference]: Finished difference Result 1516 states and 2204 transitions. [2021-11-07 01:38:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:38:02,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:38:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:02,508 INFO L225 Difference]: With dead ends: 1516 [2021-11-07 01:38:02,508 INFO L226 Difference]: Without dead ends: 981 [2021-11-07 01:38:02,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:38:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-11-07 01:38:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 979. [2021-11-07 01:38:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.4488752556237219) internal successors, (1417), 978 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1417 transitions. [2021-11-07 01:38:02,668 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1417 transitions. Word has length 81 [2021-11-07 01:38:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:02,669 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1417 transitions. [2021-11-07 01:38:02,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1417 transitions. [2021-11-07 01:38:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:38:02,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:02,674 INFO L513 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] [2021-11-07 01:38:02,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:38:02,675 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash 498152103, now seen corresponding path program 1 times [2021-11-07 01:38:02,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:02,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499007856] [2021-11-07 01:38:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:02,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:02,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:02,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499007856] [2021-11-07 01:38:02,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499007856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:02,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:02,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:38:02,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580632961] [2021-11-07 01:38:02,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:38:02,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:02,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:38:02,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:38:02,820 INFO L87 Difference]: Start difference. First operand 979 states and 1417 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:03,263 INFO L93 Difference]: Finished difference Result 2526 states and 3736 transitions. [2021-11-07 01:38:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:38:03,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:38:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:03,276 INFO L225 Difference]: With dead ends: 2526 [2021-11-07 01:38:03,277 INFO L226 Difference]: Without dead ends: 1699 [2021-11-07 01:38:03,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:38:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-11-07 01:38:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1697. [2021-11-07 01:38:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 1.4705188679245282) internal successors, (2494), 1696 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2494 transitions. [2021-11-07 01:38:03,478 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2494 transitions. Word has length 81 [2021-11-07 01:38:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:03,479 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 2494 transitions. [2021-11-07 01:38:03,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2494 transitions. [2021-11-07 01:38:03,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:38:03,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:03,481 INFO L513 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] [2021-11-07 01:38:03,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:38:03,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:03,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2079631928, now seen corresponding path program 1 times [2021-11-07 01:38:03,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:03,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562293909] [2021-11-07 01:38:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:03,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:03,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:03,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562293909] [2021-11-07 01:38:03,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562293909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:03,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:03,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:38:03,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226710640] [2021-11-07 01:38:03,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:38:03,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:03,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:38:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:38:03,620 INFO L87 Difference]: Start difference. First operand 1697 states and 2494 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:04,171 INFO L93 Difference]: Finished difference Result 4639 states and 6922 transitions. [2021-11-07 01:38:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:38:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:38:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:04,193 INFO L225 Difference]: With dead ends: 4639 [2021-11-07 01:38:04,193 INFO L226 Difference]: Without dead ends: 3135 [2021-11-07 01:38:04,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:38:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-11-07 01:38:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3133. [2021-11-07 01:38:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 3132 states have (on average 1.4827586206896552) internal successors, (4644), 3132 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 4644 transitions. [2021-11-07 01:38:04,521 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 4644 transitions. Word has length 81 [2021-11-07 01:38:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:04,522 INFO L470 AbstractCegarLoop]: Abstraction has 3133 states and 4644 transitions. [2021-11-07 01:38:04,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 4644 transitions. [2021-11-07 01:38:04,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:38:04,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:04,524 INFO L513 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] [2021-11-07 01:38:04,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:38:04,525 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash -786239274, now seen corresponding path program 1 times [2021-11-07 01:38:04,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:04,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478771161] [2021-11-07 01:38:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:04,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:04,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:04,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478771161] [2021-11-07 01:38:04,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478771161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:04,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:04,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:38:04,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395689127] [2021-11-07 01:38:04,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:38:04,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:38:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:38:04,618 INFO L87 Difference]: Start difference. First operand 3133 states and 4644 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:05,450 INFO L93 Difference]: Finished difference Result 9025 states and 13482 transitions. [2021-11-07 01:38:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:38:05,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:38:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:05,492 INFO L225 Difference]: With dead ends: 9025 [2021-11-07 01:38:05,492 INFO L226 Difference]: Without dead ends: 6007 [2021-11-07 01:38:05,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:38:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2021-11-07 01:38:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 6005. [2021-11-07 01:38:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 6004 states have (on average 1.4841772151898733) internal successors, (8911), 6004 states have internal predecessors, (8911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 8911 transitions. [2021-11-07 01:38:06,123 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 8911 transitions. Word has length 81 [2021-11-07 01:38:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:06,124 INFO L470 AbstractCegarLoop]: Abstraction has 6005 states and 8911 transitions. [2021-11-07 01:38:06,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 8911 transitions. [2021-11-07 01:38:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:38:06,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:06,127 INFO L513 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] [2021-11-07 01:38:06,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:38:06,128 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1625296500, now seen corresponding path program 1 times [2021-11-07 01:38:06,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:06,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571121947] [2021-11-07 01:38:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:06,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:06,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:06,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571121947] [2021-11-07 01:38:06,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571121947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:06,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:06,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:38:06,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451549980] [2021-11-07 01:38:06,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:38:06,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:38:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:38:06,226 INFO L87 Difference]: Start difference. First operand 6005 states and 8911 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:07,640 INFO L93 Difference]: Finished difference Result 17694 states and 26360 transitions. [2021-11-07 01:38:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:38:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:38:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:07,725 INFO L225 Difference]: With dead ends: 17694 [2021-11-07 01:38:07,725 INFO L226 Difference]: Without dead ends: 11751 [2021-11-07 01:38:07,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:38:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11751 states. [2021-11-07 01:38:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11751 to 11749. [2021-11-07 01:38:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 11748 states have (on average 1.477357848144365) internal successors, (17356), 11748 states have internal predecessors, (17356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 17356 transitions. [2021-11-07 01:38:09,031 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 17356 transitions. Word has length 81 [2021-11-07 01:38:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:09,032 INFO L470 AbstractCegarLoop]: Abstraction has 11749 states and 17356 transitions. [2021-11-07 01:38:09,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 17356 transitions. [2021-11-07 01:38:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:38:09,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:09,034 INFO L513 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] [2021-11-07 01:38:09,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:38:09,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1266366863, now seen corresponding path program 1 times [2021-11-07 01:38:09,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:09,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659092886] [2021-11-07 01:38:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:09,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:09,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:09,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659092886] [2021-11-07 01:38:09,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659092886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:09,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:09,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:38:09,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365079967] [2021-11-07 01:38:09,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:38:09,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:38:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:38:09,123 INFO L87 Difference]: Start difference. First operand 11749 states and 17356 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:10,394 INFO L93 Difference]: Finished difference Result 23420 states and 34624 transitions. [2021-11-07 01:38:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:38:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:38:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:10,444 INFO L225 Difference]: With dead ends: 23420 [2021-11-07 01:38:10,445 INFO L226 Difference]: Without dead ends: 11749 [2021-11-07 01:38:10,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:38:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2021-11-07 01:38:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 11749. [2021-11-07 01:38:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 11748 states have (on average 1.4772727272727273) internal successors, (17355), 11748 states have internal predecessors, (17355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 17355 transitions. [2021-11-07 01:38:11,366 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 17355 transitions. Word has length 82 [2021-11-07 01:38:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:11,367 INFO L470 AbstractCegarLoop]: Abstraction has 11749 states and 17355 transitions. [2021-11-07 01:38:11,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 17355 transitions. [2021-11-07 01:38:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:38:11,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:11,369 INFO L513 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] [2021-11-07 01:38:11,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:38:11,370 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:11,371 INFO L85 PathProgramCache]: Analyzing trace with hash -147514495, now seen corresponding path program 1 times [2021-11-07 01:38:11,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:11,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823693117] [2021-11-07 01:38:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:11,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:13,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:13,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823693117] [2021-11-07 01:38:13,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823693117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:13,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:13,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-07 01:38:13,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877858258] [2021-11-07 01:38:13,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 01:38:13,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:13,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 01:38:13,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:38:13,320 INFO L87 Difference]: Start difference. First operand 11749 states and 17355 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:18,251 INFO L93 Difference]: Finished difference Result 25255 states and 37117 transitions. [2021-11-07 01:38:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:38:18,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:38:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:18,336 INFO L225 Difference]: With dead ends: 25255 [2021-11-07 01:38:18,337 INFO L226 Difference]: Without dead ends: 25253 [2021-11-07 01:38:18,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:38:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25253 states. [2021-11-07 01:38:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25253 to 18931. [2021-11-07 01:38:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18931 states, 18930 states have (on average 1.4703116745905969) internal successors, (27833), 18930 states have internal predecessors, (27833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18931 states to 18931 states and 27833 transitions. [2021-11-07 01:38:19,948 INFO L78 Accepts]: Start accepts. Automaton has 18931 states and 27833 transitions. Word has length 82 [2021-11-07 01:38:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:19,949 INFO L470 AbstractCegarLoop]: Abstraction has 18931 states and 27833 transitions. [2021-11-07 01:38:19,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 18931 states and 27833 transitions. [2021-11-07 01:38:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:38:19,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:19,951 INFO L513 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] [2021-11-07 01:38:19,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:38:19,952 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:19,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:19,952 INFO L85 PathProgramCache]: Analyzing trace with hash -874101823, now seen corresponding path program 1 times [2021-11-07 01:38:19,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:19,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303748325] [2021-11-07 01:38:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:19,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:20,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:20,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303748325] [2021-11-07 01:38:20,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303748325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:20,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:20,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-07 01:38:20,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477307058] [2021-11-07 01:38:20,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:38:20,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:20,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:38:20,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:38:20,980 INFO L87 Difference]: Start difference. First operand 18931 states and 27833 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:24,269 INFO L93 Difference]: Finished difference Result 25458 states and 37314 transitions. [2021-11-07 01:38:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:38:24,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:38:24,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:24,345 INFO L225 Difference]: With dead ends: 25458 [2021-11-07 01:38:24,346 INFO L226 Difference]: Without dead ends: 23216 [2021-11-07 01:38:24,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:38:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23216 states. [2021-11-07 01:38:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23216 to 21004. [2021-11-07 01:38:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21004 states, 21003 states have (on average 1.4679807646526686) internal successors, (30832), 21003 states have internal predecessors, (30832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21004 states to 21004 states and 30832 transitions. [2021-11-07 01:38:26,384 INFO L78 Accepts]: Start accepts. Automaton has 21004 states and 30832 transitions. Word has length 82 [2021-11-07 01:38:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:26,385 INFO L470 AbstractCegarLoop]: Abstraction has 21004 states and 30832 transitions. [2021-11-07 01:38:26,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 21004 states and 30832 transitions. [2021-11-07 01:38:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:38:26,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:26,387 INFO L513 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] [2021-11-07 01:38:26,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:38:26,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:26,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1337027553, now seen corresponding path program 1 times [2021-11-07 01:38:26,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:26,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567486427] [2021-11-07 01:38:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:26,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:27,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:27,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567486427] [2021-11-07 01:38:27,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567486427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:27,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:27,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-07 01:38:27,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879450806] [2021-11-07 01:38:27,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:38:27,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:38:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:38:27,381 INFO L87 Difference]: Start difference. First operand 21004 states and 30832 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:30,108 INFO L93 Difference]: Finished difference Result 25208 states and 36894 transitions. [2021-11-07 01:38:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:38:30,108 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:38:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:30,193 INFO L225 Difference]: With dead ends: 25208 [2021-11-07 01:38:30,194 INFO L226 Difference]: Without dead ends: 25206 [2021-11-07 01:38:30,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:38:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25206 states. [2021-11-07 01:38:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25206 to 21023. [2021-11-07 01:38:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21023 states, 21022 states have (on average 1.4676529350204548) internal successors, (30853), 21022 states have internal predecessors, (30853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21023 states to 21023 states and 30853 transitions. [2021-11-07 01:38:32,340 INFO L78 Accepts]: Start accepts. Automaton has 21023 states and 30853 transitions. Word has length 82 [2021-11-07 01:38:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:32,340 INFO L470 AbstractCegarLoop]: Abstraction has 21023 states and 30853 transitions. [2021-11-07 01:38:32,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:32,341 INFO L276 IsEmpty]: Start isEmpty. Operand 21023 states and 30853 transitions. [2021-11-07 01:38:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:38:32,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:32,343 INFO L513 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] [2021-11-07 01:38:32,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:38:32,343 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1815293023, now seen corresponding path program 1 times [2021-11-07 01:38:32,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:32,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340095176] [2021-11-07 01:38:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:32,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:33,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:33,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340095176] [2021-11-07 01:38:33,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340095176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:33,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:33,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-07 01:38:33,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150037261] [2021-11-07 01:38:33,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:38:33,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:38:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:38:33,350 INFO L87 Difference]: Start difference. First operand 21023 states and 30853 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:37,304 INFO L93 Difference]: Finished difference Result 30982 states and 45382 transitions. [2021-11-07 01:38:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:38:37,305 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:38:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:37,394 INFO L225 Difference]: With dead ends: 30982 [2021-11-07 01:38:37,394 INFO L226 Difference]: Without dead ends: 30980 [2021-11-07 01:38:37,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:38:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30980 states. [2021-11-07 01:38:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30980 to 21046. [2021-11-07 01:38:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21046 states, 21045 states have (on average 1.4673794250415775) internal successors, (30881), 21045 states have internal predecessors, (30881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21046 states to 21046 states and 30881 transitions. [2021-11-07 01:38:39,798 INFO L78 Accepts]: Start accepts. Automaton has 21046 states and 30881 transitions. Word has length 82 [2021-11-07 01:38:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:39,799 INFO L470 AbstractCegarLoop]: Abstraction has 21046 states and 30881 transitions. [2021-11-07 01:38:39,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 21046 states and 30881 transitions. [2021-11-07 01:38:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:38:39,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:39,802 INFO L513 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] [2021-11-07 01:38:39,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:38:39,802 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1206852449, now seen corresponding path program 1 times [2021-11-07 01:38:39,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:39,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788673389] [2021-11-07 01:38:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:39,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:40,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:40,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788673389] [2021-11-07 01:38:40,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788673389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:40,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:40,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-07 01:38:40,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208711270] [2021-11-07 01:38:40,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:38:40,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:40,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:38:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:38:40,798 INFO L87 Difference]: Start difference. First operand 21046 states and 30881 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:44,939 INFO L93 Difference]: Finished difference Result 37807 states and 55482 transitions. [2021-11-07 01:38:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:38:44,940 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:38:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:45,025 INFO L225 Difference]: With dead ends: 37807 [2021-11-07 01:38:45,026 INFO L226 Difference]: Without dead ends: 37805 [2021-11-07 01:38:45,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:38:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37805 states. [2021-11-07 01:38:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37805 to 22837. [2021-11-07 01:38:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22837 states, 22836 states have (on average 1.4679015589420215) internal successors, (33521), 22836 states have internal predecessors, (33521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22837 states to 22837 states and 33521 transitions. [2021-11-07 01:38:47,305 INFO L78 Accepts]: Start accepts. Automaton has 22837 states and 33521 transitions. Word has length 82 [2021-11-07 01:38:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:47,305 INFO L470 AbstractCegarLoop]: Abstraction has 22837 states and 33521 transitions. [2021-11-07 01:38:47,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 22837 states and 33521 transitions. [2021-11-07 01:38:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:38:47,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:47,308 INFO L513 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] [2021-11-07 01:38:47,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:38:47,309 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:47,310 INFO L85 PathProgramCache]: Analyzing trace with hash -670987149, now seen corresponding path program 1 times [2021-11-07 01:38:47,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:38:47,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755564387] [2021-11-07 01:38:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:47,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:38:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:49,048 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:38:49,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755564387] [2021-11-07 01:38:49,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755564387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:49,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:49,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-07 01:38:49,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233412248] [2021-11-07 01:38:49,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 01:38:49,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:38:49,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 01:38:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:38:49,051 INFO L87 Difference]: Start difference. First operand 22837 states and 33521 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:59,172 INFO L93 Difference]: Finished difference Result 61721 states and 90864 transitions. [2021-11-07 01:38:59,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:38:59,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:38:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:59,284 INFO L225 Difference]: With dead ends: 61721 [2021-11-07 01:38:59,284 INFO L226 Difference]: Without dead ends: 61719 [2021-11-07 01:38:59,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 01:38:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61719 states. [2021-11-07 01:39:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61719 to 25441. [2021-11-07 01:39:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25441 states, 25440 states have (on average 1.4694182389937107) internal successors, (37382), 25440 states have internal predecessors, (37382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25441 states to 25441 states and 37382 transitions. [2021-11-07 01:39:02,442 INFO L78 Accepts]: Start accepts. Automaton has 25441 states and 37382 transitions. Word has length 83 [2021-11-07 01:39:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:02,442 INFO L470 AbstractCegarLoop]: Abstraction has 25441 states and 37382 transitions. [2021-11-07 01:39:02,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 25441 states and 37382 transitions. [2021-11-07 01:39:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:39:02,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:02,445 INFO L513 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] [2021-11-07 01:39:02,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:39:02,446 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:02,446 INFO L85 PathProgramCache]: Analyzing trace with hash 178720109, now seen corresponding path program 1 times [2021-11-07 01:39:02,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:02,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282993742] [2021-11-07 01:39:02,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:02,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:04,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:04,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282993742] [2021-11-07 01:39:04,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282993742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:04,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:04,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-07 01:39:04,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432264614] [2021-11-07 01:39:04,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 01:39:04,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:04,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 01:39:04,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:39:04,783 INFO L87 Difference]: Start difference. First operand 25441 states and 37382 transitions. Second operand has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:13,218 INFO L93 Difference]: Finished difference Result 33859 states and 49605 transitions. [2021-11-07 01:39:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 01:39:13,219 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:39:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:13,419 INFO L225 Difference]: With dead ends: 33859 [2021-11-07 01:39:13,419 INFO L226 Difference]: Without dead ends: 31649 [2021-11-07 01:39:13,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=508, Invalid=2248, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 01:39:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31649 states. [2021-11-07 01:39:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31649 to 25461. [2021-11-07 01:39:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25461 states, 25460 states have (on average 1.4691673212882954) internal successors, (37405), 25460 states have internal predecessors, (37405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25461 states to 25461 states and 37405 transitions. [2021-11-07 01:39:16,605 INFO L78 Accepts]: Start accepts. Automaton has 25461 states and 37405 transitions. Word has length 84 [2021-11-07 01:39:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:16,606 INFO L470 AbstractCegarLoop]: Abstraction has 25461 states and 37405 transitions. [2021-11-07 01:39:16,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 25461 states and 37405 transitions. [2021-11-07 01:39:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:39:16,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:16,609 INFO L513 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] [2021-11-07 01:39:16,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:39:16,609 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1905117811, now seen corresponding path program 1 times [2021-11-07 01:39:16,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:16,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673201073] [2021-11-07 01:39:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:16,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:17,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:17,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673201073] [2021-11-07 01:39:17,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673201073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:17,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:17,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-07 01:39:17,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588077757] [2021-11-07 01:39:17,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:39:17,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:17,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:39:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:39:17,754 INFO L87 Difference]: Start difference. First operand 25461 states and 37405 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:24,870 INFO L93 Difference]: Finished difference Result 46119 states and 67604 transitions. [2021-11-07 01:39:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:39:24,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:39:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:24,956 INFO L225 Difference]: With dead ends: 46119 [2021-11-07 01:39:24,957 INFO L226 Difference]: Without dead ends: 46117 [2021-11-07 01:39:24,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:39:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46117 states. [2021-11-07 01:39:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46117 to 25474. [2021-11-07 01:39:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25474 states, 25473 states have (on average 1.46904565618498) internal successors, (37421), 25473 states have internal predecessors, (37421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25474 states to 25474 states and 37421 transitions. [2021-11-07 01:39:28,653 INFO L78 Accepts]: Start accepts. Automaton has 25474 states and 37421 transitions. Word has length 84 [2021-11-07 01:39:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 25474 states and 37421 transitions. [2021-11-07 01:39:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 25474 states and 37421 transitions. [2021-11-07 01:39:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:39:28,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:28,657 INFO L513 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] [2021-11-07 01:39:28,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:39:28,657 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:28,658 INFO L85 PathProgramCache]: Analyzing trace with hash -762471091, now seen corresponding path program 1 times [2021-11-07 01:39:28,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:28,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293480206] [2021-11-07 01:39:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:28,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:29,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:29,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293480206] [2021-11-07 01:39:29,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293480206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:29,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:29,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-07 01:39:29,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598632149] [2021-11-07 01:39:29,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:39:29,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:29,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:39:29,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:39:29,797 INFO L87 Difference]: Start difference. First operand 25474 states and 37421 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:36,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:36,368 INFO L93 Difference]: Finished difference Result 40731 states and 59656 transitions. [2021-11-07 01:39:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:39:36,369 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:39:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:36,435 INFO L225 Difference]: With dead ends: 40731 [2021-11-07 01:39:36,435 INFO L226 Difference]: Without dead ends: 40729 [2021-11-07 01:39:36,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:39:36,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40729 states. [2021-11-07 01:39:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40729 to 25474. [2021-11-07 01:39:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25474 states, 25473 states have (on average 1.46904565618498) internal successors, (37421), 25473 states have internal predecessors, (37421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25474 states to 25474 states and 37421 transitions. [2021-11-07 01:39:40,073 INFO L78 Accepts]: Start accepts. Automaton has 25474 states and 37421 transitions. Word has length 84 [2021-11-07 01:39:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:40,074 INFO L470 AbstractCegarLoop]: Abstraction has 25474 states and 37421 transitions. [2021-11-07 01:39:40,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 25474 states and 37421 transitions. [2021-11-07 01:39:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:39:40,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:40,077 INFO L513 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] [2021-11-07 01:39:40,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:39:40,077 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash -75870771, now seen corresponding path program 1 times [2021-11-07 01:39:40,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:40,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52966915] [2021-11-07 01:39:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:40,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:42,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:42,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52966915] [2021-11-07 01:39:42,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52966915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:42,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:42,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-07 01:39:42,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686035821] [2021-11-07 01:39:42,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 01:39:42,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:42,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 01:39:42,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:39:42,735 INFO L87 Difference]: Start difference. First operand 25474 states and 37421 transitions. Second operand has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:52,272 INFO L93 Difference]: Finished difference Result 29705 states and 43510 transitions. [2021-11-07 01:39:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:39:52,273 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:39:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:52,330 INFO L225 Difference]: With dead ends: 29705 [2021-11-07 01:39:52,330 INFO L226 Difference]: Without dead ends: 29703 [2021-11-07 01:39:52,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=509, Invalid=2143, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 01:39:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29703 states. [2021-11-07 01:39:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29703 to 25474. [2021-11-07 01:39:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25474 states, 25473 states have (on average 1.46904565618498) internal successors, (37421), 25473 states have internal predecessors, (37421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25474 states to 25474 states and 37421 transitions. [2021-11-07 01:39:56,042 INFO L78 Accepts]: Start accepts. Automaton has 25474 states and 37421 transitions. Word has length 84 [2021-11-07 01:39:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:56,042 INFO L470 AbstractCegarLoop]: Abstraction has 25474 states and 37421 transitions. [2021-11-07 01:39:56,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 25474 states and 37421 transitions. [2021-11-07 01:39:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:39:56,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:56,044 INFO L513 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] [2021-11-07 01:39:56,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 01:39:56,044 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash -533643891, now seen corresponding path program 1 times [2021-11-07 01:39:56,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:39:56,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808723122] [2021-11-07 01:39:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:56,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:39:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:57,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:39:57,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808723122] [2021-11-07 01:39:57,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808723122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:57,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:57,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-07 01:39:57,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112724247] [2021-11-07 01:39:57,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:39:57,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:39:57,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:39:57,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:39:57,259 INFO L87 Difference]: Start difference. First operand 25474 states and 37421 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:03,006 INFO L93 Difference]: Finished difference Result 32034 states and 46942 transitions. [2021-11-07 01:40:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:40:03,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:40:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:03,057 INFO L225 Difference]: With dead ends: 32034 [2021-11-07 01:40:03,057 INFO L226 Difference]: Without dead ends: 29792 [2021-11-07 01:40:03,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:40:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29792 states. [2021-11-07 01:40:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29792 to 25492. [2021-11-07 01:40:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25492 states, 25491 states have (on average 1.4688321368326076) internal successors, (37442), 25491 states have internal predecessors, (37442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25492 states to 25492 states and 37442 transitions. [2021-11-07 01:40:06,978 INFO L78 Accepts]: Start accepts. Automaton has 25492 states and 37442 transitions. Word has length 84 [2021-11-07 01:40:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:06,978 INFO L470 AbstractCegarLoop]: Abstraction has 25492 states and 37442 transitions. [2021-11-07 01:40:06,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 25492 states and 37442 transitions. [2021-11-07 01:40:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:40:06,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:06,980 INFO L513 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] [2021-11-07 01:40:06,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:40:06,980 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:06,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1677485485, now seen corresponding path program 1 times [2021-11-07 01:40:06,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:06,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474817960] [2021-11-07 01:40:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:06,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:08,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:08,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474817960] [2021-11-07 01:40:08,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474817960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:08,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:08,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-07 01:40:08,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164994803] [2021-11-07 01:40:08,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 01:40:08,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 01:40:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:40:08,619 INFO L87 Difference]: Start difference. First operand 25492 states and 37442 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:17,034 INFO L93 Difference]: Finished difference Result 31944 states and 46734 transitions. [2021-11-07 01:40:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:40:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:40:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:17,092 INFO L225 Difference]: With dead ends: 31944 [2021-11-07 01:40:17,092 INFO L226 Difference]: Without dead ends: 31942 [2021-11-07 01:40:17,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:40:17,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31942 states. [2021-11-07 01:40:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31942 to 25496. [2021-11-07 01:40:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25496 states, 25495 states have (on average 1.4688370268680133) internal successors, (37448), 25495 states have internal predecessors, (37448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25496 states to 25496 states and 37448 transitions. [2021-11-07 01:40:20,995 INFO L78 Accepts]: Start accepts. Automaton has 25496 states and 37448 transitions. Word has length 84 [2021-11-07 01:40:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:20,995 INFO L470 AbstractCegarLoop]: Abstraction has 25496 states and 37448 transitions. [2021-11-07 01:40:20,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 25496 states and 37448 transitions. [2021-11-07 01:40:20,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:40:20,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:20,998 INFO L513 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] [2021-11-07 01:40:20,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:40:20,998 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:20,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1076849933, now seen corresponding path program 1 times [2021-11-07 01:40:20,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:20,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575089932] [2021-11-07 01:40:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:21,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:22,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:22,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575089932] [2021-11-07 01:40:22,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575089932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:22,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:22,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-07 01:40:22,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024137629] [2021-11-07 01:40:22,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 01:40:22,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 01:40:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:40:22,843 INFO L87 Difference]: Start difference. First operand 25496 states and 37448 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:32,782 INFO L93 Difference]: Finished difference Result 46202 states and 67706 transitions. [2021-11-07 01:40:32,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:40:32,784 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:40:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:32,861 INFO L225 Difference]: With dead ends: 46202 [2021-11-07 01:40:32,861 INFO L226 Difference]: Without dead ends: 46200 [2021-11-07 01:40:32,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=338, Invalid=1384, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:40:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46200 states. [2021-11-07 01:40:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46200 to 25511. [2021-11-07 01:40:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25511 states, 25510 states have (on average 1.468796550372403) internal successors, (37469), 25510 states have internal predecessors, (37469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25511 states to 25511 states and 37469 transitions. [2021-11-07 01:40:36,854 INFO L78 Accepts]: Start accepts. Automaton has 25511 states and 37469 transitions. Word has length 84 [2021-11-07 01:40:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:36,855 INFO L470 AbstractCegarLoop]: Abstraction has 25511 states and 37469 transitions. [2021-11-07 01:40:36,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 25511 states and 37469 transitions. [2021-11-07 01:40:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:40:36,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:36,857 INFO L513 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] [2021-11-07 01:40:36,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 01:40:36,858 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:36,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:36,859 INFO L85 PathProgramCache]: Analyzing trace with hash 350262605, now seen corresponding path program 1 times [2021-11-07 01:40:36,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:36,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521990207] [2021-11-07 01:40:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:36,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:38,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:38,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521990207] [2021-11-07 01:40:38,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521990207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:38,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:38,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-07 01:40:38,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707406417] [2021-11-07 01:40:38,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 01:40:38,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 01:40:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:40:38,367 INFO L87 Difference]: Start difference. First operand 25511 states and 37469 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:46,557 INFO L93 Difference]: Finished difference Result 35096 states and 51358 transitions. [2021-11-07 01:40:46,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:40:46,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:40:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:46,611 INFO L225 Difference]: With dead ends: 35096 [2021-11-07 01:40:46,611 INFO L226 Difference]: Without dead ends: 32886 [2021-11-07 01:40:46,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:40:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32886 states. [2021-11-07 01:40:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32886 to 25518. [2021-11-07 01:40:50,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25518 states, 25517 states have (on average 1.4687855155386604) internal successors, (37479), 25517 states have internal predecessors, (37479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25518 states to 25518 states and 37479 transitions. [2021-11-07 01:40:50,668 INFO L78 Accepts]: Start accepts. Automaton has 25518 states and 37479 transitions. Word has length 84 [2021-11-07 01:40:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:50,668 INFO L470 AbstractCegarLoop]: Abstraction has 25518 states and 37479 transitions. [2021-11-07 01:40:50,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 25518 states and 37479 transitions. [2021-11-07 01:40:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:40:50,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:50,671 INFO L513 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] [2021-11-07 01:40:50,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 01:40:50,671 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1733575315, now seen corresponding path program 1 times [2021-11-07 01:40:50,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:40:50,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311359753] [2021-11-07 01:40:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:50,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:40:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:52,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:40:52,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311359753] [2021-11-07 01:40:52,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311359753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:52,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:52,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-07 01:40:52,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399130867] [2021-11-07 01:40:52,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 01:40:52,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:40:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 01:40:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:40:52,334 INFO L87 Difference]: Start difference. First operand 25518 states and 37479 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:04,330 INFO L93 Difference]: Finished difference Result 51224 states and 75148 transitions. [2021-11-07 01:41:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:41:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:41:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:04,421 INFO L225 Difference]: With dead ends: 51224 [2021-11-07 01:41:04,422 INFO L226 Difference]: Without dead ends: 51222 [2021-11-07 01:41:04,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=342, Invalid=1550, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:41:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51222 states. [2021-11-07 01:41:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51222 to 25521. [2021-11-07 01:41:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25521 states, 25520 states have (on average 1.468730407523511) internal successors, (37482), 25520 states have internal predecessors, (37482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25521 states to 25521 states and 37482 transitions. [2021-11-07 01:41:08,788 INFO L78 Accepts]: Start accepts. Automaton has 25521 states and 37482 transitions. Word has length 84 [2021-11-07 01:41:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:08,788 INFO L470 AbstractCegarLoop]: Abstraction has 25521 states and 37482 transitions. [2021-11-07 01:41:08,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 25521 states and 37482 transitions. [2021-11-07 01:41:08,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:41:08,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:08,790 INFO L513 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] [2021-11-07 01:41:08,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 01:41:08,791 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:08,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash -590928595, now seen corresponding path program 1 times [2021-11-07 01:41:08,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:41:08,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649247534] [2021-11-07 01:41:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:08,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:41:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:09,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:41:09,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649247534] [2021-11-07 01:41:09,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649247534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:09,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:09,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-07 01:41:09,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315123867] [2021-11-07 01:41:09,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:41:09,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:41:09,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:41:09,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:41:09,895 INFO L87 Difference]: Start difference. First operand 25521 states and 37482 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)