./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7 --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 2f774b3e755d7b6f786f7d23823d008ce09be620750647481355094233fd1ac8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:12:57,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:12:57,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:12:57,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:12:57,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:12:57,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:12:57,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:12:57,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:12:57,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:12:57,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:12:57,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:12:57,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:12:57,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:12:57,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:12:57,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:12:57,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:12:57,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:12:57,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:12:57,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:12:57,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:12:57,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:12:57,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:12:57,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:12:57,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:12:57,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:12:57,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:12:57,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:12:57,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:12:57,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:12:57,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:12:57,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:12:57,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:12:57,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:12:57,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:12:57,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:12:57,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:12:57,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:12:57,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:12:57,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:12:57,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:12:57,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:12:57,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:12:57,839 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:12:57,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:12:57,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:12:57,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:12:57,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:12:57,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:12:57,850 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:12:57,850 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:12:57,850 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:12:57,851 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:12:57,852 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:12:57,852 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:12:57,852 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:12:57,852 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:12:57,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:12:57,853 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:12:57,853 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:12:57,853 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:12:57,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:12:57,855 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:12:57,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:12:57,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:12:57,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:12:57,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:12:57,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:12:57,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:12:57,856 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:12:57,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:12:57,857 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:12:57,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:12:57,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:12:57,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:12:57,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:12:57,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:12:57,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:12:57,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:12:57,858 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:12:57,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:12:57,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:12:57,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:12:57,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:12:57,859 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_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f774b3e755d7b6f786f7d23823d008ce09be620750647481355094233fd1ac8 [2021-11-25 18:12:58,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:12:58,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:12:58,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:12:58,202 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:12:58,203 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:12:58,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-25 18:12:58,272 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/data/aacf1bac6/8f356fa2770f47a8a9d917a910d46526/FLAG81c9208d8 [2021-11-25 18:12:58,745 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:12:58,747 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-25 18:12:58,767 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/data/aacf1bac6/8f356fa2770f47a8a9d917a910d46526/FLAG81c9208d8 [2021-11-25 18:12:59,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/data/aacf1bac6/8f356fa2770f47a8a9d917a910d46526 [2021-11-25 18:12:59,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:12:59,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:12:59,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:12:59,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:12:59,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:12:59,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e2ce64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59, skipping insertion in model container [2021-11-25 18:12:59,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:12:59,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:12:59,510 WARN L230 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_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2021-11-25 18:12:59,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:12:59,580 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:12:59,664 WARN L230 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_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2021-11-25 18:12:59,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:12:59,714 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:12:59,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59 WrapperNode [2021-11-25 18:12:59,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:12:59,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:12:59,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:12:59,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:12:59,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,801 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 574 [2021-11-25 18:12:59,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:12:59,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:12:59,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:12:59,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:12:59,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:12:59,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:12:59,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:12:59,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:12:59,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (1/1) ... [2021-11-25 18:12:59,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:12:59,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:12:59,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:12:59,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:12:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:12:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:12:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:12:59,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:13:00,057 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:13:00,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:13:00,680 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:13:00,909 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:13:00,910 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:13:00,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:13:00 BoogieIcfgContainer [2021-11-25 18:13:00,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:13:00,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:13:00,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:13:00,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:13:00,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:12:59" (1/3) ... [2021-11-25 18:13:00,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d0b7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:13:00, skipping insertion in model container [2021-11-25 18:13:00,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:12:59" (2/3) ... [2021-11-25 18:13:00,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d0b7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:13:00, skipping insertion in model container [2021-11-25 18:13:00,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:13:00" (3/3) ... [2021-11-25 18:13:00,921 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-25 18:13:00,927 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:13:00,927 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:13:00,976 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:13:00,983 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 [2021-11-25 18:13:00,983 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:13:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 105 states have (on average 1.6952380952380952) internal successors, (178), 106 states have internal predecessors, (178), 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) [2021-11-25 18:13:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:13:01,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:01,005 INFO L514 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] [2021-11-25 18:13:01,006 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:01,010 INFO L85 PathProgramCache]: Analyzing trace with hash 102892927, now seen corresponding path program 1 times [2021-11-25 18:13:01,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:01,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256769582] [2021-11-25 18:13:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:01,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:01,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:01,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256769582] [2021-11-25 18:13:01,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256769582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:01,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:01,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:13:01,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961689888] [2021-11-25 18:13:01,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:01,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:13:01,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:13:01,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:13:01,582 INFO L87 Difference]: Start difference. First operand has 107 states, 105 states have (on average 1.6952380952380952) internal successors, (178), 106 states have internal predecessors, (178), 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 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2021-11-25 18:13:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:01,846 INFO L93 Difference]: Finished difference Result 294 states and 469 transitions. [2021-11-25 18:13:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:13:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 42 [2021-11-25 18:13:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:01,860 INFO L225 Difference]: With dead ends: 294 [2021-11-25 18:13:01,860 INFO L226 Difference]: Without dead ends: 220 [2021-11-25 18:13:01,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:13:01,867 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 357 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:01,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 435 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:13:01,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-25 18:13:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2021-11-25 18:13:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3488372093023255) internal successors, (290), 215 states have internal predecessors, (290), 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) [2021-11-25 18:13:01,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 290 transitions. [2021-11-25 18:13:01,983 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 290 transitions. Word has length 42 [2021-11-25 18:13:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:01,984 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 290 transitions. [2021-11-25 18:13:01,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2021-11-25 18:13:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 290 transitions. [2021-11-25 18:13:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:13:01,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:01,988 INFO L514 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] [2021-11-25 18:13:01,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:13:01,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1576605676, now seen corresponding path program 1 times [2021-11-25 18:13:01,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:01,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40192628] [2021-11-25 18:13:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:01,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:02,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:02,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40192628] [2021-11-25 18:13:02,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40192628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:02,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:02,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:13:02,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991765196] [2021-11-25 18:13:02,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:02,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:13:02,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:13:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:13:02,117 INFO L87 Difference]: Start difference. First operand 216 states and 290 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-25 18:13:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:02,322 INFO L93 Difference]: Finished difference Result 487 states and 669 transitions. [2021-11-25 18:13:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:13:02,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 43 [2021-11-25 18:13:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:02,329 INFO L225 Difference]: With dead ends: 487 [2021-11-25 18:13:02,329 INFO L226 Difference]: Without dead ends: 310 [2021-11-25 18:13:02,335 INFO L932 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 [2021-11-25 18:13:02,337 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 344 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:02,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 155 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:13:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-25 18:13:02,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2021-11-25 18:13:02,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3648208469055374) internal successors, (419), 307 states have internal predecessors, (419), 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) [2021-11-25 18:13:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 419 transitions. [2021-11-25 18:13:02,401 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 419 transitions. Word has length 43 [2021-11-25 18:13:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:02,405 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 419 transitions. [2021-11-25 18:13:02,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-25 18:13:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 419 transitions. [2021-11-25 18:13:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:13:02,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:02,414 INFO L514 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] [2021-11-25 18:13:02,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:13:02,414 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:02,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1069135709, now seen corresponding path program 1 times [2021-11-25 18:13:02,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:02,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609643452] [2021-11-25 18:13:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:02,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:02,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:02,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609643452] [2021-11-25 18:13:02,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609643452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:02,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:02,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:13:02,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945034647] [2021-11-25 18:13:02,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:02,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:13:02,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:02,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:13:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:13:02,554 INFO L87 Difference]: Start difference. First operand 308 states and 419 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-25 18:13:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:02,781 INFO L93 Difference]: Finished difference Result 743 states and 1035 transitions. [2021-11-25 18:13:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:13:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 43 [2021-11-25 18:13:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:02,786 INFO L225 Difference]: With dead ends: 743 [2021-11-25 18:13:02,786 INFO L226 Difference]: Without dead ends: 494 [2021-11-25 18:13:02,790 INFO L932 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 [2021-11-25 18:13:02,797 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 327 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:02,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 163 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:13:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-25 18:13:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 492. [2021-11-25 18:13:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.3808553971486761) internal successors, (678), 491 states have internal predecessors, (678), 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) [2021-11-25 18:13:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 678 transitions. [2021-11-25 18:13:02,850 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 678 transitions. Word has length 43 [2021-11-25 18:13:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:02,851 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 678 transitions. [2021-11-25 18:13:02,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-25 18:13:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 678 transitions. [2021-11-25 18:13:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:13:02,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:02,854 INFO L514 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] [2021-11-25 18:13:02,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:13:02,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash -794613547, now seen corresponding path program 1 times [2021-11-25 18:13:02,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647500999] [2021-11-25 18:13:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:02,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:02,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:02,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647500999] [2021-11-25 18:13:02,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647500999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:02,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:02,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:13:02,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317706518] [2021-11-25 18:13:02,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:02,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:13:02,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:02,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:13:02,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:13:02,946 INFO L87 Difference]: Start difference. First operand 492 states and 678 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-25 18:13:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:03,099 INFO L93 Difference]: Finished difference Result 950 states and 1318 transitions. [2021-11-25 18:13:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:13:03,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2021-11-25 18:13:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:03,103 INFO L225 Difference]: With dead ends: 950 [2021-11-25 18:13:03,103 INFO L226 Difference]: Without dead ends: 492 [2021-11-25 18:13:03,104 INFO L932 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 [2021-11-25 18:13:03,105 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 289 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:03,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 125 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:13:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-25 18:13:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2021-11-25 18:13:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.3788187372708758) internal successors, (677), 491 states have internal predecessors, (677), 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) [2021-11-25 18:13:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 677 transitions. [2021-11-25 18:13:03,173 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 677 transitions. Word has length 44 [2021-11-25 18:13:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:03,174 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 677 transitions. [2021-11-25 18:13:03,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-25 18:13:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 677 transitions. [2021-11-25 18:13:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:13:03,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:03,175 INFO L514 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] [2021-11-25 18:13:03,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:13:03,176 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1799207693, now seen corresponding path program 1 times [2021-11-25 18:13:03,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:03,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685057223] [2021-11-25 18:13:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:03,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:03,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:03,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685057223] [2021-11-25 18:13:03,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685057223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:03,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:03,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:13:03,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917310432] [2021-11-25 18:13:03,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:03,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:13:03,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:03,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:13:03,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:13:03,448 INFO L87 Difference]: Start difference. First operand 492 states and 677 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2021-11-25 18:13:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:04,203 INFO L93 Difference]: Finished difference Result 1351 states and 1885 transitions. [2021-11-25 18:13:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:13:04,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 44 [2021-11-25 18:13:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:04,211 INFO L225 Difference]: With dead ends: 1351 [2021-11-25 18:13:04,211 INFO L226 Difference]: Without dead ends: 1139 [2021-11-25 18:13:04,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:13:04,213 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 867 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:04,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 758 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:13:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-25 18:13:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 772. [2021-11-25 18:13:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.3670557717250325) internal successors, (1054), 771 states have internal predecessors, (1054), 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) [2021-11-25 18:13:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1054 transitions. [2021-11-25 18:13:04,310 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1054 transitions. Word has length 44 [2021-11-25 18:13:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:04,311 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 1054 transitions. [2021-11-25 18:13:04,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2021-11-25 18:13:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1054 transitions. [2021-11-25 18:13:04,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:13:04,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:04,312 INFO L514 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] [2021-11-25 18:13:04,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:13:04,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:04,313 INFO L85 PathProgramCache]: Analyzing trace with hash 195944659, now seen corresponding path program 1 times [2021-11-25 18:13:04,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:04,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69294008] [2021-11-25 18:13:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:04,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:04,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:04,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69294008] [2021-11-25 18:13:04,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69294008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:04,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:04,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:13:04,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635811435] [2021-11-25 18:13:04,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:04,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:13:04,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:04,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:13:04,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:13:04,562 INFO L87 Difference]: Start difference. First operand 772 states and 1054 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2021-11-25 18:13:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:05,370 INFO L93 Difference]: Finished difference Result 1619 states and 2218 transitions. [2021-11-25 18:13:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:13:05,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 44 [2021-11-25 18:13:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:05,380 INFO L225 Difference]: With dead ends: 1619 [2021-11-25 18:13:05,381 INFO L226 Difference]: Without dead ends: 1545 [2021-11-25 18:13:05,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:13:05,382 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 789 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:05,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 845 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:13:05,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-11-25 18:13:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 968. [2021-11-25 18:13:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 1.358841778697001) internal successors, (1314), 967 states have internal predecessors, (1314), 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) [2021-11-25 18:13:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1314 transitions. [2021-11-25 18:13:05,492 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1314 transitions. Word has length 44 [2021-11-25 18:13:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:05,492 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1314 transitions. [2021-11-25 18:13:05,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2021-11-25 18:13:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1314 transitions. [2021-11-25 18:13:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:13:05,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:05,493 INFO L514 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] [2021-11-25 18:13:05,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:13:05,494 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:05,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1532498947, now seen corresponding path program 1 times [2021-11-25 18:13:05,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:05,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484157032] [2021-11-25 18:13:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:05,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:05,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:05,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484157032] [2021-11-25 18:13:05,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484157032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:05,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:05,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:13:05,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613657813] [2021-11-25 18:13:05,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:05,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:13:05,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:13:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:13:05,742 INFO L87 Difference]: Start difference. First operand 968 states and 1314 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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) [2021-11-25 18:13:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:06,659 INFO L93 Difference]: Finished difference Result 3045 states and 4295 transitions. [2021-11-25 18:13:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:13:06,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 45 [2021-11-25 18:13:06,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:06,676 INFO L225 Difference]: With dead ends: 3045 [2021-11-25 18:13:06,676 INFO L226 Difference]: Without dead ends: 2675 [2021-11-25 18:13:06,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:13:06,679 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 966 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:06,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 742 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:13:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2021-11-25 18:13:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 1875. [2021-11-25 18:13:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.375667022411953) internal successors, (2578), 1874 states have internal predecessors, (2578), 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) [2021-11-25 18:13:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2578 transitions. [2021-11-25 18:13:06,917 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2578 transitions. Word has length 45 [2021-11-25 18:13:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:06,917 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 2578 transitions. [2021-11-25 18:13:06,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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) [2021-11-25 18:13:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2578 transitions. [2021-11-25 18:13:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:13:06,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:06,919 INFO L514 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] [2021-11-25 18:13:06,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:13:06,919 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:06,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1933316935, now seen corresponding path program 1 times [2021-11-25 18:13:06,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:06,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407245220] [2021-11-25 18:13:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:06,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:07,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:07,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407245220] [2021-11-25 18:13:07,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407245220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:07,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:07,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 18:13:07,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692415269] [2021-11-25 18:13:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:07,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:13:07,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:13:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:13:07,189 INFO L87 Difference]: Start difference. First operand 1875 states and 2578 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2021-11-25 18:13:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:07,958 INFO L93 Difference]: Finished difference Result 2834 states and 3894 transitions. [2021-11-25 18:13:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:13:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 46 [2021-11-25 18:13:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:07,976 INFO L225 Difference]: With dead ends: 2834 [2021-11-25 18:13:07,976 INFO L226 Difference]: Without dead ends: 2766 [2021-11-25 18:13:07,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:13:07,979 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 424 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:07,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 854 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:13:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-11-25 18:13:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1887. [2021-11-25 18:13:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 1.3732767762460234) internal successors, (2590), 1886 states have internal predecessors, (2590), 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) [2021-11-25 18:13:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2590 transitions. [2021-11-25 18:13:08,228 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2590 transitions. Word has length 46 [2021-11-25 18:13:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:08,229 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2590 transitions. [2021-11-25 18:13:08,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2021-11-25 18:13:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2590 transitions. [2021-11-25 18:13:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:13:08,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:08,230 INFO L514 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] [2021-11-25 18:13:08,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:13:08,231 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1957610103, now seen corresponding path program 1 times [2021-11-25 18:13:08,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:08,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682983075] [2021-11-25 18:13:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:08,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:08,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:08,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682983075] [2021-11-25 18:13:08,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682983075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:08,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:08,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 18:13:08,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204960858] [2021-11-25 18:13:08,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:08,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:13:08,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:08,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:13:08,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:13:08,486 INFO L87 Difference]: Start difference. First operand 1887 states and 2590 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-11-25 18:13:09,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:09,230 INFO L93 Difference]: Finished difference Result 4346 states and 6012 transitions. [2021-11-25 18:13:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:13:09,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 47 [2021-11-25 18:13:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:09,254 INFO L225 Difference]: With dead ends: 4346 [2021-11-25 18:13:09,254 INFO L226 Difference]: Without dead ends: 3942 [2021-11-25 18:13:09,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:13:09,257 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 578 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:09,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 907 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:13:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2021-11-25 18:13:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 2700. [2021-11-25 18:13:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 1.3793997776954428) internal successors, (3723), 2699 states have internal predecessors, (3723), 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) [2021-11-25 18:13:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 3723 transitions. [2021-11-25 18:13:09,591 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 3723 transitions. Word has length 47 [2021-11-25 18:13:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:09,592 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 3723 transitions. [2021-11-25 18:13:09,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-11-25 18:13:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 3723 transitions. [2021-11-25 18:13:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:13:09,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:09,593 INFO L514 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] [2021-11-25 18:13:09,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:13:09,594 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:09,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash -342204841, now seen corresponding path program 1 times [2021-11-25 18:13:09,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:09,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799906062] [2021-11-25 18:13:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:09,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:09,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:09,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799906062] [2021-11-25 18:13:09,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799906062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:09,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:09,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 18:13:09,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191813356] [2021-11-25 18:13:09,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:09,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:13:09,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:09,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:13:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:13:09,842 INFO L87 Difference]: Start difference. First operand 2700 states and 3723 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-11-25 18:13:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:10,837 INFO L93 Difference]: Finished difference Result 4077 states and 5629 transitions. [2021-11-25 18:13:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:13:10,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 47 [2021-11-25 18:13:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:10,856 INFO L225 Difference]: With dead ends: 4077 [2021-11-25 18:13:10,856 INFO L226 Difference]: Without dead ends: 3707 [2021-11-25 18:13:10,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:13:10,859 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 367 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:10,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 877 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:13:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2021-11-25 18:13:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 2712. [2021-11-25 18:13:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 1.3777203983769826) internal successors, (3735), 2711 states have internal predecessors, (3735), 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) [2021-11-25 18:13:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 3735 transitions. [2021-11-25 18:13:11,181 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 3735 transitions. Word has length 47 [2021-11-25 18:13:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:11,182 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 3735 transitions. [2021-11-25 18:13:11,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-11-25 18:13:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 3735 transitions. [2021-11-25 18:13:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:13:11,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:11,183 INFO L514 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] [2021-11-25 18:13:11,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:13:11,184 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -64186630, now seen corresponding path program 1 times [2021-11-25 18:13:11,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:11,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82820635] [2021-11-25 18:13:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:11,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:11,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82820635] [2021-11-25 18:13:11,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82820635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:11,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:11,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:11,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699979551] [2021-11-25 18:13:11,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:11,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:11,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:11,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:11,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:11,218 INFO L87 Difference]: Start difference. First operand 2712 states and 3735 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-25 18:13:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:11,536 INFO L93 Difference]: Finished difference Result 4856 states and 6744 transitions. [2021-11-25 18:13:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:13:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2021-11-25 18:13:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:11,552 INFO L225 Difference]: With dead ends: 4856 [2021-11-25 18:13:11,552 INFO L226 Difference]: Without dead ends: 2625 [2021-11-25 18:13:11,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:11,558 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 70 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:11,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 230 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:13:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-11-25 18:13:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2561. [2021-11-25 18:13:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 1.375390625) internal successors, (3521), 2560 states have internal predecessors, (3521), 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) [2021-11-25 18:13:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3521 transitions. [2021-11-25 18:13:11,832 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3521 transitions. Word has length 47 [2021-11-25 18:13:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:11,833 INFO L470 AbstractCegarLoop]: Abstraction has 2561 states and 3521 transitions. [2021-11-25 18:13:11,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-25 18:13:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3521 transitions. [2021-11-25 18:13:11,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 18:13:11,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:11,834 INFO L514 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] [2021-11-25 18:13:11,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:13:11,834 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1527480717, now seen corresponding path program 1 times [2021-11-25 18:13:11,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:11,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245221993] [2021-11-25 18:13:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:11,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:11,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245221993] [2021-11-25 18:13:11,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245221993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:11,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:11,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:11,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119326766] [2021-11-25 18:13:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:11,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:11,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:11,864 INFO L87 Difference]: Start difference. First operand 2561 states and 3521 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-25 18:13:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:12,181 INFO L93 Difference]: Finished difference Result 4388 states and 6076 transitions. [2021-11-25 18:13:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:13:12,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2021-11-25 18:13:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:12,195 INFO L225 Difference]: With dead ends: 4388 [2021-11-25 18:13:12,195 INFO L226 Difference]: Without dead ends: 2262 [2021-11-25 18:13:12,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:12,200 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 68 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:12,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 222 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:13:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-11-25 18:13:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2259. [2021-11-25 18:13:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 1.3715677590788309) internal successors, (3097), 2258 states have internal predecessors, (3097), 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) [2021-11-25 18:13:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3097 transitions. [2021-11-25 18:13:12,447 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3097 transitions. Word has length 48 [2021-11-25 18:13:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:12,448 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 3097 transitions. [2021-11-25 18:13:12,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-11-25 18:13:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3097 transitions. [2021-11-25 18:13:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:13:12,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:12,449 INFO L514 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] [2021-11-25 18:13:12,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:13:12,449 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 167722955, now seen corresponding path program 1 times [2021-11-25 18:13:12,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:12,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92102735] [2021-11-25 18:13:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:12,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:14,410 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:14,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92102735] [2021-11-25 18:13:14,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92102735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:14,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:14,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-25 18:13:14,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065356554] [2021-11-25 18:13:14,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:14,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:13:14,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:14,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:13:14,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:13:14,413 INFO L87 Difference]: Start difference. First operand 2259 states and 3097 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 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) [2021-11-25 18:13:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:17,928 INFO L93 Difference]: Finished difference Result 3140 states and 4300 transitions. [2021-11-25 18:13:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:13:17,929 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 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 49 [2021-11-25 18:13:17,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:17,941 INFO L225 Difference]: With dead ends: 3140 [2021-11-25 18:13:17,941 INFO L226 Difference]: Without dead ends: 3076 [2021-11-25 18:13:17,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=559, Invalid=1511, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 18:13:17,944 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 680 mSDsluCounter, 2411 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:17,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 2663 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:13:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-11-25 18:13:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2247. [2021-11-25 18:13:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.373107747105966) internal successors, (3084), 2246 states have internal predecessors, (3084), 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) [2021-11-25 18:13:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3084 transitions. [2021-11-25 18:13:18,157 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3084 transitions. Word has length 49 [2021-11-25 18:13:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:18,158 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 3084 transitions. [2021-11-25 18:13:18,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 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) [2021-11-25 18:13:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3084 transitions. [2021-11-25 18:13:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 18:13:18,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:18,160 INFO L514 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] [2021-11-25 18:13:18,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:13:18,160 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1679079827, now seen corresponding path program 1 times [2021-11-25 18:13:18,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:18,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654855598] [2021-11-25 18:13:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:18,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:18,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:18,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654855598] [2021-11-25 18:13:18,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654855598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:18,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:18,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:18,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516513357] [2021-11-25 18:13:18,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:18,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:18,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:18,210 INFO L87 Difference]: Start difference. First operand 2247 states and 3084 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-25 18:13:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:18,512 INFO L93 Difference]: Finished difference Result 4661 states and 6441 transitions. [2021-11-25 18:13:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:13:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-11-25 18:13:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:18,529 INFO L225 Difference]: With dead ends: 4661 [2021-11-25 18:13:18,529 INFO L226 Difference]: Without dead ends: 3184 [2021-11-25 18:13:18,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:18,533 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 65 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:18,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 262 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:13:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-11-25 18:13:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2955. [2021-11-25 18:13:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 1.3601895734597156) internal successors, (4018), 2954 states have internal predecessors, (4018), 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) [2021-11-25 18:13:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4018 transitions. [2021-11-25 18:13:18,810 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4018 transitions. Word has length 54 [2021-11-25 18:13:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:18,811 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 4018 transitions. [2021-11-25 18:13:18,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-25 18:13:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4018 transitions. [2021-11-25 18:13:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 18:13:18,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:18,812 INFO L514 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] [2021-11-25 18:13:18,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:13:18,813 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:18,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2132365901, now seen corresponding path program 1 times [2021-11-25 18:13:18,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:18,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159503144] [2021-11-25 18:13:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:18,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:18,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:18,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159503144] [2021-11-25 18:13:18,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159503144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:18,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:18,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:18,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957142177] [2021-11-25 18:13:18,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:18,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:18,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:18,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:18,859 INFO L87 Difference]: Start difference. First operand 2955 states and 4018 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2021-11-25 18:13:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:19,195 INFO L93 Difference]: Finished difference Result 5897 states and 8053 transitions. [2021-11-25 18:13:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:13:19,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-25 18:13:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:19,206 INFO L225 Difference]: With dead ends: 5897 [2021-11-25 18:13:19,206 INFO L226 Difference]: Without dead ends: 3715 [2021-11-25 18:13:19,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:19,209 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 62 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:19,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 244 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:13:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2021-11-25 18:13:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 3404. [2021-11-25 18:13:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 3403 states have (on average 1.3467528651190126) internal successors, (4583), 3403 states have internal predecessors, (4583), 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) [2021-11-25 18:13:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 4583 transitions. [2021-11-25 18:13:19,508 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 4583 transitions. Word has length 56 [2021-11-25 18:13:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:19,508 INFO L470 AbstractCegarLoop]: Abstraction has 3404 states and 4583 transitions. [2021-11-25 18:13:19,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2021-11-25 18:13:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 4583 transitions. [2021-11-25 18:13:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 18:13:19,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:19,510 INFO L514 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] [2021-11-25 18:13:19,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:13:19,510 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:19,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:19,511 INFO L85 PathProgramCache]: Analyzing trace with hash 846093606, now seen corresponding path program 1 times [2021-11-25 18:13:19,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:19,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257867870] [2021-11-25 18:13:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:19,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:19,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257867870] [2021-11-25 18:13:19,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257867870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:19,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:19,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:19,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111126105] [2021-11-25 18:13:19,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:19,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:19,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:19,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:19,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:19,557 INFO L87 Difference]: Start difference. First operand 3404 states and 4583 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-25 18:13:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:19,934 INFO L93 Difference]: Finished difference Result 4798 states and 6462 transitions. [2021-11-25 18:13:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:13:19,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-25 18:13:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:19,942 INFO L225 Difference]: With dead ends: 4798 [2021-11-25 18:13:19,943 INFO L226 Difference]: Without dead ends: 3825 [2021-11-25 18:13:19,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:19,946 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 58 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:19,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 248 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:13:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-11-25 18:13:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3823. [2021-11-25 18:13:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 1.337781266352695) internal successors, (5113), 3822 states have internal predecessors, (5113), 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) [2021-11-25 18:13:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 5113 transitions. [2021-11-25 18:13:20,345 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 5113 transitions. Word has length 59 [2021-11-25 18:13:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:20,346 INFO L470 AbstractCegarLoop]: Abstraction has 3823 states and 5113 transitions. [2021-11-25 18:13:20,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-25 18:13:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 5113 transitions. [2021-11-25 18:13:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 18:13:20,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:20,348 INFO L514 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] [2021-11-25 18:13:20,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:13:20,348 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:20,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1494975814, now seen corresponding path program 1 times [2021-11-25 18:13:20,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:20,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930493100] [2021-11-25 18:13:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:20,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:20,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:20,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930493100] [2021-11-25 18:13:20,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930493100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:20,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:20,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:20,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191462827] [2021-11-25 18:13:20,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:20,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:20,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:20,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:20,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:20,398 INFO L87 Difference]: Start difference. First operand 3823 states and 5113 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-25 18:13:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:20,918 INFO L93 Difference]: Finished difference Result 8490 states and 11406 transitions. [2021-11-25 18:13:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:13:20,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-25 18:13:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:20,927 INFO L225 Difference]: With dead ends: 8490 [2021-11-25 18:13:20,927 INFO L226 Difference]: Without dead ends: 5007 [2021-11-25 18:13:20,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:20,940 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 57 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:20,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 225 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:13:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2021-11-25 18:13:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 4612. [2021-11-25 18:13:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 1.3220559531554976) internal successors, (6096), 4611 states have internal predecessors, (6096), 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) [2021-11-25 18:13:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 6096 transitions. [2021-11-25 18:13:21,451 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 6096 transitions. Word has length 59 [2021-11-25 18:13:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:21,451 INFO L470 AbstractCegarLoop]: Abstraction has 4612 states and 6096 transitions. [2021-11-25 18:13:21,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-25 18:13:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 6096 transitions. [2021-11-25 18:13:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 18:13:21,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:21,454 INFO L514 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] [2021-11-25 18:13:21,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 18:13:21,454 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash -807262722, now seen corresponding path program 1 times [2021-11-25 18:13:21,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:21,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592862135] [2021-11-25 18:13:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:21,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:21,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:21,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592862135] [2021-11-25 18:13:21,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592862135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:21,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:21,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:13:21,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014754423] [2021-11-25 18:13:21,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:21,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:13:21,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:21,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:13:21,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:13:21,546 INFO L87 Difference]: Start difference. First operand 4612 states and 6096 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2021-11-25 18:13:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:22,544 INFO L93 Difference]: Finished difference Result 6266 states and 8244 transitions. [2021-11-25 18:13:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:13:22,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 64 [2021-11-25 18:13:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:22,561 INFO L225 Difference]: With dead ends: 6266 [2021-11-25 18:13:22,561 INFO L226 Difference]: Without dead ends: 6264 [2021-11-25 18:13:22,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:13:22,565 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 282 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:22,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 671 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:13:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6264 states. [2021-11-25 18:13:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6264 to 5447. [2021-11-25 18:13:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5447 states, 5446 states have (on average 1.3191333088505326) internal successors, (7184), 5446 states have internal predecessors, (7184), 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) [2021-11-25 18:13:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5447 states to 5447 states and 7184 transitions. [2021-11-25 18:13:23,331 INFO L78 Accepts]: Start accepts. Automaton has 5447 states and 7184 transitions. Word has length 64 [2021-11-25 18:13:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:23,331 INFO L470 AbstractCegarLoop]: Abstraction has 5447 states and 7184 transitions. [2021-11-25 18:13:23,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2021-11-25 18:13:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5447 states and 7184 transitions. [2021-11-25 18:13:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 18:13:23,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:23,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:13:23,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 18:13:23,335 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1377501983, now seen corresponding path program 1 times [2021-11-25 18:13:23,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:23,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211622889] [2021-11-25 18:13:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:23,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:23,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:23,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211622889] [2021-11-25 18:13:23,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211622889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:13:23,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636144188] [2021-11-25 18:13:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:23,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:13:23,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:13:23,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:13:23,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:13:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:23,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-25 18:13:23,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:13:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:13:26,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:14:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:14:19,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636144188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:14:19,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2047632940] [2021-11-25 18:14:19,644 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-25 18:14:19,644 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:14:19,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:14:19,657 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:14:19,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:14:19,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:14:19,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:14:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 18:14:19,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:19,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:19,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:19,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 18:14:30,159 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:04,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '162321#(and (<= (+ |ULTIMATE.start_main_~node2__m2~1#1| 1) 0) (<= |ULTIMATE.start_main_~node3__m3~1#1| 127) (= ~mode2~0 0) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= ~__return_6144~0 1) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 1 ~__return_6067~0) (= ~__tmp_6277_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1|) (<= 0 (+ ~p1_old~0 1)) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_3~0#1|) (<= 0 ~id1~0) (= |ULTIMATE.start_main_~check__tmp~1#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~2#1| 1)) (= ~p2~0 0) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~1#1| 1)) (= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send1~0 127) (<= ~st1~0 0) (= ~p3_new~0 ~nomsg~0) (<= ~__return_6207~0 1) (<= 0 (+ ~p3_old~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~2#1| 256) 0) (<= 0 ~st1~0) (<= 0 ~st2~0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~1#1|) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~1#1| 127) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (= 2 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1|) (<= ~send2~0 127) (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~2#1| 1)) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (= 2 ~r1~0) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= 2 |ULTIMATE.start_main_~main__i2~0#1|) (<= 1 ~__return_6207~0) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~1#1| 1)) (<= 1 ~__tmp_6234_0~0) (<= ~st2~0 0) (= ~__return_6290~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~2#1| 1) 0) (= ~mode1~0 0) (= ~mode3~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 1 ~__tmp_6277_0~0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_6276~0) (<= (+ |ULTIMATE.start_main_~node2__m2~2#1| 1) 0) (= ~__return_6445~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~1#1| 1) 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (= |ULTIMATE.start_main_~assert__arg~2#1| |ULTIMATE.start_main_~__tmp_3~0#1|) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (= |ULTIMATE.start_main_~check__tmp~2#1| ~__return_6276~0) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~1#1| 1)) (<= ~__return_6067~0 1) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (<= 1 ~__return_6144~0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|))' at error location [2021-11-25 18:15:04,089 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:15:04,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:15:04,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 21] total 52 [2021-11-25 18:15:04,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077576539] [2021-11-25 18:15:04,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:15:04,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-25 18:15:04,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-25 18:15:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1671, Invalid=9885, Unknown=0, NotChecked=0, Total=11556 [2021-11-25 18:15:04,094 INFO L87 Difference]: Start difference. First operand 5447 states and 7184 transitions. Second operand has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 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) [2021-11-25 18:15:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:48,609 INFO L93 Difference]: Finished difference Result 16293 states and 21474 transitions. [2021-11-25 18:15:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-11-25 18:15:48,610 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 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 74 [2021-11-25 18:15:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:48,634 INFO L225 Difference]: With dead ends: 16293 [2021-11-25 18:15:48,634 INFO L226 Difference]: Without dead ends: 12075 [2021-11-25 18:15:48,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25424 ImplicationChecksByTransitivity, 74.8s TimeCoverageRelationStatistics Valid=6651, Invalid=52155, Unknown=0, NotChecked=0, Total=58806 [2021-11-25 18:15:48,657 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 5362 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 5418 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5362 SdHoareTripleChecker+Valid, 3190 SdHoareTripleChecker+Invalid, 6030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 5418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:48,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5362 Valid, 3190 Invalid, 6030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 5418 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-25 18:15:48,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12075 states. [2021-11-25 18:15:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12075 to 7549. [2021-11-25 18:15:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7549 states, 7548 states have (on average 1.2979597244303127) internal successors, (9797), 7548 states have internal predecessors, (9797), 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) [2021-11-25 18:15:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7549 states to 7549 states and 9797 transitions. [2021-11-25 18:15:50,165 INFO L78 Accepts]: Start accepts. Automaton has 7549 states and 9797 transitions. Word has length 74 [2021-11-25 18:15:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:50,166 INFO L470 AbstractCegarLoop]: Abstraction has 7549 states and 9797 transitions. [2021-11-25 18:15:50,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 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) [2021-11-25 18:15:50,166 INFO L276 IsEmpty]: Start isEmpty. Operand 7549 states and 9797 transitions. [2021-11-25 18:15:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 18:15:50,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:50,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:50,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:50,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:50,396 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1286150614, now seen corresponding path program 1 times [2021-11-25 18:15:50,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:50,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891192048] [2021-11-25 18:15:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:50,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:15:50,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:50,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891192048] [2021-11-25 18:15:50,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891192048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:15:50,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:15:50,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:15:50,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917722040] [2021-11-25 18:15:50,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:15:50,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:15:50,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:15:50,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:15:50,575 INFO L87 Difference]: Start difference. First operand 7549 states and 9797 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2021-11-25 18:15:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:53,299 INFO L93 Difference]: Finished difference Result 19361 states and 25242 transitions. [2021-11-25 18:15:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:15:53,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 74 [2021-11-25 18:15:53,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:53,331 INFO L225 Difference]: With dead ends: 19361 [2021-11-25 18:15:53,331 INFO L226 Difference]: Without dead ends: 12071 [2021-11-25 18:15:53,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:15:53,346 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 611 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:53,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 253 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:15:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12071 states. [2021-11-25 18:15:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12071 to 9846. [2021-11-25 18:15:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.2790248857287962) internal successors, (12592), 9845 states have internal predecessors, (12592), 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) [2021-11-25 18:15:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 12592 transitions. [2021-11-25 18:15:55,815 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 12592 transitions. Word has length 74 [2021-11-25 18:15:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:55,815 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 12592 transitions. [2021-11-25 18:15:55,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2021-11-25 18:15:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 12592 transitions. [2021-11-25 18:15:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 18:15:55,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:55,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:55,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 18:15:55,820 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:55,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:55,821 INFO L85 PathProgramCache]: Analyzing trace with hash -873353669, now seen corresponding path program 1 times [2021-11-25 18:15:55,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:55,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922353699] [2021-11-25 18:15:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:55,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:15:56,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922353699] [2021-11-25 18:15:56,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922353699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137539449] [2021-11-25 18:15:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:56,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:56,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:56,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:56,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:15:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-25 18:15:56,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:16:00,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:21:41,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137539449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:41,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1117920757] [2021-11-25 18:21:41,036 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-25 18:21:41,036 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:21:41,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:21:41,037 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:21:41,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:21:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:21:41,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 18:21:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:21:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:21:41,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-25 18:21:53,277 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:41,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1117920757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:41,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:41,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [18, 26, 25] total 118 [2021-11-25 18:22:41,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053944416] [2021-11-25 18:22:41,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:41,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-25 18:22:41,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-25 18:22:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2056, Invalid=11750, Unknown=0, NotChecked=0, Total=13806 [2021-11-25 18:22:41,385 INFO L87 Difference]: Start difference. First operand 9846 states and 12592 transitions. Second operand has 55 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 54 states have internal predecessors, (70), 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) [2021-11-25 18:23:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:03,608 INFO L93 Difference]: Finished difference Result 11680 states and 14934 transitions. [2021-11-25 18:23:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-25 18:23:03,608 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 54 states have internal predecessors, (70), 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 74 [2021-11-25 18:23:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:03,625 INFO L225 Difference]: With dead ends: 11680 [2021-11-25 18:23:03,625 INFO L226 Difference]: Without dead ends: 9907 [2021-11-25 18:23:03,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 110 SyntacticMatches, 13 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8371 ImplicationChecksByTransitivity, 77.1s TimeCoverageRelationStatistics Valid=2257, Invalid=14255, Unknown=0, NotChecked=0, Total=16512 [2021-11-25 18:23:03,632 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 109 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 5096 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 5116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 5096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:03,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 320 Invalid, 5116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 5096 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-11-25 18:23:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9907 states. [2021-11-25 18:23:05,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9907 to 9886. [2021-11-25 18:23:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9886 states, 9885 states have (on average 1.278199291856348) internal successors, (12635), 9885 states have internal predecessors, (12635), 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) [2021-11-25 18:23:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9886 states to 9886 states and 12635 transitions. [2021-11-25 18:23:05,460 INFO L78 Accepts]: Start accepts. Automaton has 9886 states and 12635 transitions. Word has length 74 [2021-11-25 18:23:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:05,460 INFO L470 AbstractCegarLoop]: Abstraction has 9886 states and 12635 transitions. [2021-11-25 18:23:05,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 54 states have internal predecessors, (70), 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) [2021-11-25 18:23:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9886 states and 12635 transitions. [2021-11-25 18:23:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:23:05,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:05,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:05,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 18:23:05,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:05,680 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash -826129279, now seen corresponding path program 1 times [2021-11-25 18:23:05,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:05,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840132160] [2021-11-25 18:23:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:05,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:23:05,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:05,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840132160] [2021-11-25 18:23:05,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840132160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:05,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:05,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:23:05,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985902753] [2021-11-25 18:23:05,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:05,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:23:05,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:05,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:23:05,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:23:05,788 INFO L87 Difference]: Start difference. First operand 9886 states and 12635 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2021-11-25 18:23:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:08,346 INFO L93 Difference]: Finished difference Result 21746 states and 28010 transitions. [2021-11-25 18:23:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:23:08,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 76 [2021-11-25 18:23:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:08,360 INFO L225 Difference]: With dead ends: 21746 [2021-11-25 18:23:08,361 INFO L226 Difference]: Without dead ends: 13056 [2021-11-25 18:23:08,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:23:08,371 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 618 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:08,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 226 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:23:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13056 states. [2021-11-25 18:23:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13056 to 11869. [2021-11-25 18:23:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11869 states, 11868 states have (on average 1.264324233232221) internal successors, (15005), 11868 states have internal predecessors, (15005), 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) [2021-11-25 18:23:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11869 states to 11869 states and 15005 transitions. [2021-11-25 18:23:10,650 INFO L78 Accepts]: Start accepts. Automaton has 11869 states and 15005 transitions. Word has length 76 [2021-11-25 18:23:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:10,650 INFO L470 AbstractCegarLoop]: Abstraction has 11869 states and 15005 transitions. [2021-11-25 18:23:10,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2021-11-25 18:23:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 11869 states and 15005 transitions. [2021-11-25 18:23:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:23:10,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:10,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:10,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 18:23:10,654 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 791375612, now seen corresponding path program 1 times [2021-11-25 18:23:10,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:10,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717506140] [2021-11-25 18:23:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:10,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:11,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:11,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717506140] [2021-11-25 18:23:11,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717506140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:11,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625890387] [2021-11-25 18:23:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:11,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:11,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:11,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:11,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:23:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 18:23:11,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:23:12,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:23:12,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625890387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:12,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:23:12,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [18] total 33 [2021-11-25 18:23:12,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365579198] [2021-11-25 18:23:12,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:12,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:23:12,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:12,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:23:12,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:23:12,696 INFO L87 Difference]: Start difference. First operand 11869 states and 15005 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 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) [2021-11-25 18:23:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:17,345 INFO L93 Difference]: Finished difference Result 25711 states and 32832 transitions. [2021-11-25 18:23:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 18:23:17,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 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 76 [2021-11-25 18:23:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:17,364 INFO L225 Difference]: With dead ends: 25711 [2021-11-25 18:23:17,364 INFO L226 Difference]: Without dead ends: 17280 [2021-11-25 18:23:17,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 18:23:17,374 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 1229 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:17,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1229 Valid, 1119 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:23:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17280 states. [2021-11-25 18:23:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17280 to 12534. [2021-11-25 18:23:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12534 states, 12533 states have (on average 1.266097502593154) internal successors, (15868), 12533 states have internal predecessors, (15868), 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) [2021-11-25 18:23:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12534 states to 12534 states and 15868 transitions. [2021-11-25 18:23:19,850 INFO L78 Accepts]: Start accepts. Automaton has 12534 states and 15868 transitions. Word has length 76 [2021-11-25 18:23:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:19,850 INFO L470 AbstractCegarLoop]: Abstraction has 12534 states and 15868 transitions. [2021-11-25 18:23:19,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 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) [2021-11-25 18:23:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 12534 states and 15868 transitions. [2021-11-25 18:23:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:23:19,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:19,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:19,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:20,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 18:23:20,080 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2142761637, now seen corresponding path program 1 times [2021-11-25 18:23:20,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:20,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221434009] [2021-11-25 18:23:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:20,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:20,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:20,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221434009] [2021-11-25 18:23:20,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221434009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:20,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:20,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:23:20,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166972352] [2021-11-25 18:23:20,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:20,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:23:20,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:20,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:23:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:23:20,123 INFO L87 Difference]: Start difference. First operand 12534 states and 15868 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-11-25 18:23:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:21,776 INFO L93 Difference]: Finished difference Result 19153 states and 24395 transitions. [2021-11-25 18:23:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:23:21,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2021-11-25 18:23:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:21,784 INFO L225 Difference]: With dead ends: 19153 [2021-11-25 18:23:21,784 INFO L226 Difference]: Without dead ends: 7093 [2021-11-25 18:23:21,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:23:21,796 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 51 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:21,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 206 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:23:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7093 states. [2021-11-25 18:23:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7093 to 6405. [2021-11-25 18:23:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6405 states, 6404 states have (on average 1.2603060587133041) internal successors, (8071), 6404 states have internal predecessors, (8071), 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) [2021-11-25 18:23:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 8071 transitions. [2021-11-25 18:23:23,290 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 8071 transitions. Word has length 76 [2021-11-25 18:23:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:23,291 INFO L470 AbstractCegarLoop]: Abstraction has 6405 states and 8071 transitions. [2021-11-25 18:23:23,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-11-25 18:23:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 8071 transitions. [2021-11-25 18:23:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:23:23,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:23,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:23,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 18:23:23,293 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 513650125, now seen corresponding path program 1 times [2021-11-25 18:23:23,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:23,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436818134] [2021-11-25 18:23:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:23,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:23:23,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436818134] [2021-11-25 18:23:23,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436818134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:23,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:23,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:23:23,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292255563] [2021-11-25 18:23:23,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:23,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:23:23,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:23,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:23:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:23:23,338 INFO L87 Difference]: Start difference. First operand 6405 states and 8071 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-25 18:23:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:24,625 INFO L93 Difference]: Finished difference Result 7639 states and 9636 transitions. [2021-11-25 18:23:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:23:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 76 [2021-11-25 18:23:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:24,631 INFO L225 Difference]: With dead ends: 7639 [2021-11-25 18:23:24,632 INFO L226 Difference]: Without dead ends: 5433 [2021-11-25 18:23:24,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:23:24,635 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 58 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:24,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 262 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:23:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2021-11-25 18:23:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 5308. [2021-11-25 18:23:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5308 states, 5307 states have (on average 1.2447710570944037) internal successors, (6606), 5307 states have internal predecessors, (6606), 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) [2021-11-25 18:23:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5308 states to 5308 states and 6606 transitions. [2021-11-25 18:23:25,940 INFO L78 Accepts]: Start accepts. Automaton has 5308 states and 6606 transitions. Word has length 76 [2021-11-25 18:23:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:25,940 INFO L470 AbstractCegarLoop]: Abstraction has 5308 states and 6606 transitions. [2021-11-25 18:23:25,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-25 18:23:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 5308 states and 6606 transitions. [2021-11-25 18:23:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:23:25,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:25,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:25,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 18:23:25,942 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:25,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2024582335, now seen corresponding path program 1 times [2021-11-25 18:23:25,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:25,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577378033] [2021-11-25 18:23:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:25,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:23:25,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:25,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577378033] [2021-11-25 18:23:25,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577378033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:25,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:25,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:23:25,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734792993] [2021-11-25 18:23:25,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:25,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:23:25,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:25,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:23:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:23:25,981 INFO L87 Difference]: Start difference. First operand 5308 states and 6606 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-25 18:23:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:27,731 INFO L93 Difference]: Finished difference Result 9239 states and 11533 transitions. [2021-11-25 18:23:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:23:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 77 [2021-11-25 18:23:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:27,737 INFO L225 Difference]: With dead ends: 9239 [2021-11-25 18:23:27,737 INFO L226 Difference]: Without dead ends: 6641 [2021-11-25 18:23:27,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:23:27,741 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 70 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:27,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 280 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:23:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-11-25 18:23:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 6639. [2021-11-25 18:23:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 1.2315456462789998) internal successors, (8175), 6638 states have internal predecessors, (8175), 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) [2021-11-25 18:23:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 8175 transitions. [2021-11-25 18:23:29,430 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 8175 transitions. Word has length 77 [2021-11-25 18:23:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:29,431 INFO L470 AbstractCegarLoop]: Abstraction has 6639 states and 8175 transitions. [2021-11-25 18:23:29,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-25 18:23:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 8175 transitions. [2021-11-25 18:23:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:23:29,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:29,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:29,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 18:23:29,433 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash -47692006, now seen corresponding path program 1 times [2021-11-25 18:23:29,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:29,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278453162] [2021-11-25 18:23:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:29,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:23:29,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278453162] [2021-11-25 18:23:29,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278453162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:29,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:29,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:23:29,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437706179] [2021-11-25 18:23:29,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:29,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:23:29,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:29,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:23:29,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:23:29,541 INFO L87 Difference]: Start difference. First operand 6639 states and 8175 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-11-25 18:23:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:31,998 INFO L93 Difference]: Finished difference Result 12036 states and 14899 transitions. [2021-11-25 18:23:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:23:31,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 77 [2021-11-25 18:23:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:32,006 INFO L225 Difference]: With dead ends: 12036 [2021-11-25 18:23:32,007 INFO L226 Difference]: Without dead ends: 7914 [2021-11-25 18:23:32,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:23:32,012 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 285 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:32,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 280 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:23:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7914 states. [2021-11-25 18:23:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7914 to 7716. [2021-11-25 18:23:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7716 states, 7715 states have (on average 1.2235904082955282) internal successors, (9440), 7715 states have internal predecessors, (9440), 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) [2021-11-25 18:23:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7716 states to 7716 states and 9440 transitions. [2021-11-25 18:23:34,107 INFO L78 Accepts]: Start accepts. Automaton has 7716 states and 9440 transitions. Word has length 77 [2021-11-25 18:23:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:34,108 INFO L470 AbstractCegarLoop]: Abstraction has 7716 states and 9440 transitions. [2021-11-25 18:23:34,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-11-25 18:23:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 7716 states and 9440 transitions. [2021-11-25 18:23:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 18:23:34,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:34,110 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:34,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 18:23:34,110 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2002549724, now seen corresponding path program 1 times [2021-11-25 18:23:34,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:34,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739187338] [2021-11-25 18:23:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:34,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:23:34,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739187338] [2021-11-25 18:23:34,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739187338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:34,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:34,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:23:34,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816152354] [2021-11-25 18:23:34,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:34,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:23:34,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:23:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:23:34,199 INFO L87 Difference]: Start difference. First operand 7716 states and 9440 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-11-25 18:23:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:37,092 INFO L93 Difference]: Finished difference Result 11047 states and 13519 transitions. [2021-11-25 18:23:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:23:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 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 78 [2021-11-25 18:23:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:37,102 INFO L225 Difference]: With dead ends: 11047 [2021-11-25 18:23:37,103 INFO L226 Difference]: Without dead ends: 9930 [2021-11-25 18:23:37,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:23:37,106 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 409 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:37,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 246 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9930 states. [2021-11-25 18:23:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9930 to 9926. [2021-11-25 18:23:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9926 states, 9925 states have (on average 1.2187405541561713) internal successors, (12096), 9925 states have internal predecessors, (12096), 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) [2021-11-25 18:23:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 12096 transitions. [2021-11-25 18:23:39,925 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 12096 transitions. Word has length 78 [2021-11-25 18:23:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:39,925 INFO L470 AbstractCegarLoop]: Abstraction has 9926 states and 12096 transitions. [2021-11-25 18:23:39,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-11-25 18:23:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 12096 transitions. [2021-11-25 18:23:39,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 18:23:39,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:39,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:39,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 18:23:39,928 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:39,929 INFO L85 PathProgramCache]: Analyzing trace with hash -156954559, now seen corresponding path program 1 times [2021-11-25 18:23:39,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:39,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290935592] [2021-11-25 18:23:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:39,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:40,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:40,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290935592] [2021-11-25 18:23:40,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290935592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:40,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246636541] [2021-11-25 18:23:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:40,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:40,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:40,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:40,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a62c915-e8fb-4116-8d72-c3df95d9f7ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:23:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:40,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-25 18:23:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:46,067 INFO L328 TraceCheckSpWp]: Computing backward predicates...