./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh --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 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:52:21,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:52:21,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:52:21,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:52:21,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:52:21,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:52:21,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:52:21,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:52:21,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:52:21,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:52:21,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:52:21,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:52:21,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:52:21,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:52:21,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:52:21,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:52:21,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:52:21,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:52:21,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:52:21,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:52:21,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:52:21,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:52:21,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:52:21,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:52:21,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:52:21,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:52:21,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:52:21,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:52:21,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:52:21,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:52:21,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:52:21,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:52:21,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:52:21,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:52:21,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:52:21,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:52:21,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:52:21,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:52:21,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:52:21,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:52:21,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:52:21,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:52:21,841 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:52:21,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:52:21,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:52:21,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:52:21,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:52:21,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:52:21,842 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:52:21,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:52:21,842 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:52:21,843 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:52:21,843 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:52:21,843 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:52:21,843 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:52:21,843 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:52:21,843 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:52:21,843 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:52:21,843 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:52:21,844 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:52:21,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:52:21,844 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:52:21,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:52:21,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:52:21,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:52:21,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:52:21,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:52:21,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:52:21,845 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:52:21,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:52:21,845 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:52:21,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:52:21,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:52:21,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:52:21,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:52:21,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:52:21,846 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:52:21,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:52:21,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:52:21,846 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:52:21,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:52:21,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:52:21,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:52:21,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 [2022-12-14 14:52:22,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:52:22,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:52:22,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:52:22,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:52:22,030 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:52:22,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2022-12-14 14:52:24,548 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:52:24,807 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:52:24,808 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2022-12-14 14:52:24,818 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/data/41925c8d5/a1a8bd880e474b7a8298a1a069733d64/FLAG5ac15e311 [2022-12-14 14:52:25,119 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/data/41925c8d5/a1a8bd880e474b7a8298a1a069733d64 [2022-12-14 14:52:25,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:52:25,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:52:25,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:52:25,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:52:25,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:52:25,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@948bd16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25, skipping insertion in model container [2022-12-14 14:52:25,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:52:25,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:52:25,501 WARN L237 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_904bafd2-eabc-49c4-8b19-848a4af23922/sv-benchmarks/c/eca-rers2012/Problem03_label12.c[56222,56235] [2022-12-14 14:52:25,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:52:25,554 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:52:25,708 WARN L237 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_904bafd2-eabc-49c4-8b19-848a4af23922/sv-benchmarks/c/eca-rers2012/Problem03_label12.c[56222,56235] [2022-12-14 14:52:25,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:52:25,729 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:52:25,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25 WrapperNode [2022-12-14 14:52:25,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:52:25,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:52:25,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:52:25,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:52:25,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,816 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 14:52:25,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:52:25,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:52:25,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:52:25,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:52:25,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,918 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:52:25,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:52:25,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:52:25,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:52:25,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (1/1) ... [2022-12-14 14:52:25,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:52:25,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:25,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:52:25,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:52:25,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:52:25,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:52:25,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:52:25,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:52:26,055 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:52:26,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:52:27,281 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:52:27,499 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:52:27,499 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 14:52:27,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:27 BoogieIcfgContainer [2022-12-14 14:52:27,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:52:27,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:52:27,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:52:27,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:52:27,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:52:25" (1/3) ... [2022-12-14 14:52:27,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eae98d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:27, skipping insertion in model container [2022-12-14 14:52:27,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:25" (2/3) ... [2022-12-14 14:52:27,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eae98d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:27, skipping insertion in model container [2022-12-14 14:52:27,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:27" (3/3) ... [2022-12-14 14:52:27,508 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label12.c [2022-12-14 14:52:27,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:52:27,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:52:27,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:52:27,571 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@212a9b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:52:27,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:52:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2022-12-14 14:52:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 14:52:27,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:27,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:27,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash 209341879, now seen corresponding path program 1 times [2022-12-14 14:52:27,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:27,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033186992] [2022-12-14 14:52:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:27,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:28,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033186992] [2022-12-14 14:52:28,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033186992] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:28,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:28,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:52:28,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015892345] [2022-12-14 14:52:28,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:28,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:28,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:28,218 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-12-14 14:52:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:28,861 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 14:52:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2022-12-14 14:52:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:28,871 INFO L225 Difference]: With dead ends: 440 [2022-12-14 14:52:28,871 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 14:52:28,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:28,875 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:28,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:52:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 14:52:28,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 14:52:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8055555555555556) internal successors, (520), 288 states have internal predecessors, (520), 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) [2022-12-14 14:52:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 520 transitions. [2022-12-14 14:52:28,912 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 520 transitions. Word has length 143 [2022-12-14 14:52:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:28,913 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 520 transitions. [2022-12-14 14:52:28,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-12-14 14:52:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 520 transitions. [2022-12-14 14:52:28,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 14:52:28,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:28,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:28,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:52:28,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:28,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:28,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1322617761, now seen corresponding path program 1 times [2022-12-14 14:52:28,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:28,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763992269] [2022-12-14 14:52:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:28,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:29,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:29,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763992269] [2022-12-14 14:52:29,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763992269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:29,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:29,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:52:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798735586] [2022-12-14 14:52:29,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:29,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:29,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:29,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:29,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:29,113 INFO L87 Difference]: Start difference. First operand 289 states and 520 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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) [2022-12-14 14:52:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:29,691 INFO L93 Difference]: Finished difference Result 865 states and 1558 transitions. [2022-12-14 14:52:29,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:29,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 148 [2022-12-14 14:52:29,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:29,694 INFO L225 Difference]: With dead ends: 865 [2022-12-14 14:52:29,694 INFO L226 Difference]: Without dead ends: 577 [2022-12-14 14:52:29,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:29,696 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:29,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 69 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:52:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-12-14 14:52:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2022-12-14 14:52:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.6742160278745644) internal successors, (961), 574 states have internal predecessors, (961), 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) [2022-12-14 14:52:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 961 transitions. [2022-12-14 14:52:29,725 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 961 transitions. Word has length 148 [2022-12-14 14:52:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:29,725 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 961 transitions. [2022-12-14 14:52:29,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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) [2022-12-14 14:52:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 961 transitions. [2022-12-14 14:52:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 14:52:29,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:29,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:29,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:52:29,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:29,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1094382166, now seen corresponding path program 1 times [2022-12-14 14:52:29,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:29,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594667228] [2022-12-14 14:52:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:29,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:29,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:29,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594667228] [2022-12-14 14:52:29,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594667228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:29,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:29,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:52:29,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644979398] [2022-12-14 14:52:29,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:29,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:29,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:29,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:29,848 INFO L87 Difference]: Start difference. First operand 575 states and 961 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2022-12-14 14:52:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:30,445 INFO L93 Difference]: Finished difference Result 1721 states and 2880 transitions. [2022-12-14 14:52:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 151 [2022-12-14 14:52:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:30,452 INFO L225 Difference]: With dead ends: 1721 [2022-12-14 14:52:30,452 INFO L226 Difference]: Without dead ends: 1147 [2022-12-14 14:52:30,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:30,454 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:30,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:52:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-12-14 14:52:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-12-14 14:52:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6282722513089005) internal successors, (1866), 1146 states have internal predecessors, (1866), 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) [2022-12-14 14:52:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1866 transitions. [2022-12-14 14:52:30,489 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1866 transitions. Word has length 151 [2022-12-14 14:52:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:30,489 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1866 transitions. [2022-12-14 14:52:30,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2022-12-14 14:52:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1866 transitions. [2022-12-14 14:52:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 14:52:30,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:30,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:30,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:52:30,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:30,494 INFO L85 PathProgramCache]: Analyzing trace with hash -316856357, now seen corresponding path program 1 times [2022-12-14 14:52:30,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:30,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458779959] [2022-12-14 14:52:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:30,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:52:30,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458779959] [2022-12-14 14:52:30,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458779959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:30,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:30,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646607352] [2022-12-14 14:52:30,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:30,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:30,650 INFO L87 Difference]: Start difference. First operand 1147 states and 1866 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-12-14 14:52:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:31,301 INFO L93 Difference]: Finished difference Result 3437 states and 5595 transitions. [2022-12-14 14:52:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:31,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 158 [2022-12-14 14:52:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:31,309 INFO L225 Difference]: With dead ends: 3437 [2022-12-14 14:52:31,309 INFO L226 Difference]: Without dead ends: 2291 [2022-12-14 14:52:31,310 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:52:31,312 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:31,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 231 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:52:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-12-14 14:52:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-12-14 14:52:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.5362445414847161) internal successors, (3518), 2290 states have internal predecessors, (3518), 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) [2022-12-14 14:52:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3518 transitions. [2022-12-14 14:52:31,361 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3518 transitions. Word has length 158 [2022-12-14 14:52:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:31,362 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3518 transitions. [2022-12-14 14:52:31,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-12-14 14:52:31,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3518 transitions. [2022-12-14 14:52:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 14:52:31,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:31,365 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:31,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:52:31,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash 441257277, now seen corresponding path program 1 times [2022-12-14 14:52:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:31,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493987298] [2022-12-14 14:52:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:52:31,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:31,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493987298] [2022-12-14 14:52:31,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493987298] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:31,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:31,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:52:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073662776] [2022-12-14 14:52:31,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:31,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:31,472 INFO L87 Difference]: Start difference. First operand 2291 states and 3518 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-12-14 14:52:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:31,858 INFO L93 Difference]: Finished difference Result 4581 states and 7035 transitions. [2022-12-14 14:52:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:31,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 176 [2022-12-14 14:52:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:31,866 INFO L225 Difference]: With dead ends: 4581 [2022-12-14 14:52:31,866 INFO L226 Difference]: Without dead ends: 2291 [2022-12-14 14:52:31,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:31,868 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:31,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:52:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-12-14 14:52:31,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-12-14 14:52:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4995633187772925) internal successors, (3434), 2290 states have internal predecessors, (3434), 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) [2022-12-14 14:52:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3434 transitions. [2022-12-14 14:52:31,915 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3434 transitions. Word has length 176 [2022-12-14 14:52:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:31,915 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3434 transitions. [2022-12-14 14:52:31,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-12-14 14:52:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3434 transitions. [2022-12-14 14:52:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 14:52:31,919 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:31,919 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:31,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:52:31,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1711694246, now seen corresponding path program 1 times [2022-12-14 14:52:31,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:31,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037863560] [2022-12-14 14:52:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:31,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:52:32,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:32,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037863560] [2022-12-14 14:52:32,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037863560] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:32,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:32,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:32,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337352922] [2022-12-14 14:52:32,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:32,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:32,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:32,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:32,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:32,021 INFO L87 Difference]: Start difference. First operand 2291 states and 3434 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2022-12-14 14:52:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:32,663 INFO L93 Difference]: Finished difference Result 5725 states and 8667 transitions. [2022-12-14 14:52:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 177 [2022-12-14 14:52:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:32,669 INFO L225 Difference]: With dead ends: 5725 [2022-12-14 14:52:32,670 INFO L226 Difference]: Without dead ends: 3435 [2022-12-14 14:52:32,671 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:52:32,672 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 165 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:32,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 229 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:52:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-12-14 14:52:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-12-14 14:52:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.4391380314502038) internal successors, (4942), 3434 states have internal predecessors, (4942), 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) [2022-12-14 14:52:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4942 transitions. [2022-12-14 14:52:32,720 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4942 transitions. Word has length 177 [2022-12-14 14:52:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:32,720 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4942 transitions. [2022-12-14 14:52:32,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2022-12-14 14:52:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4942 transitions. [2022-12-14 14:52:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 14:52:32,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:32,724 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:32,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:52:32,724 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:32,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1024543858, now seen corresponding path program 1 times [2022-12-14 14:52:32,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:32,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564110792] [2022-12-14 14:52:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 14:52:32,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:32,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564110792] [2022-12-14 14:52:32,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564110792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:32,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:32,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:32,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156771231] [2022-12-14 14:52:32,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:32,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:32,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:32,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:32,858 INFO L87 Difference]: Start difference. First operand 3435 states and 4942 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2022-12-14 14:52:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:33,494 INFO L93 Difference]: Finished difference Result 9872 states and 14193 transitions. [2022-12-14 14:52:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:33,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 177 [2022-12-14 14:52:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:33,513 INFO L225 Difference]: With dead ends: 9872 [2022-12-14 14:52:33,513 INFO L226 Difference]: Without dead ends: 6438 [2022-12-14 14:52:33,518 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:52:33,518 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 149 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:33,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 257 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:52:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2022-12-14 14:52:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 6438. [2022-12-14 14:52:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 1.2875563150535965) internal successors, (8288), 6437 states have internal predecessors, (8288), 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) [2022-12-14 14:52:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 8288 transitions. [2022-12-14 14:52:33,624 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 8288 transitions. Word has length 177 [2022-12-14 14:52:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:33,625 INFO L495 AbstractCegarLoop]: Abstraction has 6438 states and 8288 transitions. [2022-12-14 14:52:33,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2022-12-14 14:52:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 8288 transitions. [2022-12-14 14:52:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-12-14 14:52:33,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:33,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:33,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:52:33,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:33,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1248521739, now seen corresponding path program 1 times [2022-12-14 14:52:33,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:33,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671419561] [2022-12-14 14:52:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:33,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:33,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671419561] [2022-12-14 14:52:33,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671419561] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:33,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:33,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:52:33,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110535584] [2022-12-14 14:52:33,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:33,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:33,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:33,809 INFO L87 Difference]: Start difference. First operand 6438 states and 8288 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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) [2022-12-14 14:52:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:34,324 INFO L93 Difference]: Finished difference Result 15306 states and 20129 transitions. [2022-12-14 14:52:34,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:34,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 187 [2022-12-14 14:52:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:34,339 INFO L225 Difference]: With dead ends: 15306 [2022-12-14 14:52:34,339 INFO L226 Difference]: Without dead ends: 8869 [2022-12-14 14:52:34,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:34,344 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:34,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 98 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:52:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8869 states. [2022-12-14 14:52:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8869 to 8869. [2022-12-14 14:52:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8869 states, 8868 states have (on average 1.2223725755525485) internal successors, (10840), 8868 states have internal predecessors, (10840), 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) [2022-12-14 14:52:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8869 states to 8869 states and 10840 transitions. [2022-12-14 14:52:34,457 INFO L78 Accepts]: Start accepts. Automaton has 8869 states and 10840 transitions. Word has length 187 [2022-12-14 14:52:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:34,457 INFO L495 AbstractCegarLoop]: Abstraction has 8869 states and 10840 transitions. [2022-12-14 14:52:34,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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) [2022-12-14 14:52:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 8869 states and 10840 transitions. [2022-12-14 14:52:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-12-14 14:52:34,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:34,466 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:34,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:52:34,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:34,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1857608071, now seen corresponding path program 1 times [2022-12-14 14:52:34,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:34,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442282969] [2022-12-14 14:52:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:34,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:52:34,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:34,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442282969] [2022-12-14 14:52:34,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442282969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:34,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:34,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:34,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785452461] [2022-12-14 14:52:34,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:34,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:34,665 INFO L87 Difference]: Start difference. First operand 8869 states and 10840 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2022-12-14 14:52:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:35,184 INFO L93 Difference]: Finished difference Result 20883 states and 25584 transitions. [2022-12-14 14:52:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:35,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 212 [2022-12-14 14:52:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:35,201 INFO L225 Difference]: With dead ends: 20883 [2022-12-14 14:52:35,201 INFO L226 Difference]: Without dead ends: 12015 [2022-12-14 14:52:35,206 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:52:35,207 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 94 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:35,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 216 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:52:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12015 states. [2022-12-14 14:52:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12015 to 11157. [2022-12-14 14:52:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11157 states, 11156 states have (on average 1.211545356758695) internal successors, (13516), 11156 states have internal predecessors, (13516), 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) [2022-12-14 14:52:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11157 states to 11157 states and 13516 transitions. [2022-12-14 14:52:35,366 INFO L78 Accepts]: Start accepts. Automaton has 11157 states and 13516 transitions. Word has length 212 [2022-12-14 14:52:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:35,366 INFO L495 AbstractCegarLoop]: Abstraction has 11157 states and 13516 transitions. [2022-12-14 14:52:35,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2022-12-14 14:52:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 11157 states and 13516 transitions. [2022-12-14 14:52:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-12-14 14:52:35,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:35,381 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:35,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:52:35,382 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:35,382 INFO L85 PathProgramCache]: Analyzing trace with hash -176845250, now seen corresponding path program 1 times [2022-12-14 14:52:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:35,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211285426] [2022-12-14 14:52:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:35,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:35,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211285426] [2022-12-14 14:52:35,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211285426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:35,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:35,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267198194] [2022-12-14 14:52:35,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:35,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:52:35,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:35,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:52:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:52:35,606 INFO L87 Difference]: Start difference. First operand 11157 states and 13516 transitions. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2022-12-14 14:52:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:36,301 INFO L93 Difference]: Finished difference Result 22742 states and 27549 transitions. [2022-12-14 14:52:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:52:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 3 states have internal predecessors, (228), 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 228 [2022-12-14 14:52:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:36,313 INFO L225 Difference]: With dead ends: 22742 [2022-12-14 14:52:36,313 INFO L226 Difference]: Without dead ends: 11586 [2022-12-14 14:52:36,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:52:36,319 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 217 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:36,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 32 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:52:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2022-12-14 14:52:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 11157. [2022-12-14 14:52:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11157 states, 11156 states have (on average 1.211545356758695) internal successors, (13516), 11156 states have internal predecessors, (13516), 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) [2022-12-14 14:52:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11157 states to 11157 states and 13516 transitions. [2022-12-14 14:52:36,447 INFO L78 Accepts]: Start accepts. Automaton has 11157 states and 13516 transitions. Word has length 228 [2022-12-14 14:52:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:36,447 INFO L495 AbstractCegarLoop]: Abstraction has 11157 states and 13516 transitions. [2022-12-14 14:52:36,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2022-12-14 14:52:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 11157 states and 13516 transitions. [2022-12-14 14:52:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-12-14 14:52:36,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:36,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:36,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:52:36,457 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:36,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1895030703, now seen corresponding path program 1 times [2022-12-14 14:52:36,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:36,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362410653] [2022-12-14 14:52:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:36,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:52:36,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:36,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362410653] [2022-12-14 14:52:36,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362410653] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:36,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:36,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:36,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807822149] [2022-12-14 14:52:36,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:36,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:52:36,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:36,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:52:36,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:52:36,668 INFO L87 Difference]: Start difference. First operand 11157 states and 13516 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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) [2022-12-14 14:52:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:37,275 INFO L93 Difference]: Finished difference Result 23171 states and 27970 transitions. [2022-12-14 14:52:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:52:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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 229 [2022-12-14 14:52:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:37,285 INFO L225 Difference]: With dead ends: 23171 [2022-12-14 14:52:37,286 INFO L226 Difference]: Without dead ends: 12015 [2022-12-14 14:52:37,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:52:37,292 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:37,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 11 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:52:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12015 states. [2022-12-14 14:52:37,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12015 to 12015. [2022-12-14 14:52:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12015 states, 12014 states have (on average 1.1906941901115364) internal successors, (14305), 12014 states have internal predecessors, (14305), 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) [2022-12-14 14:52:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12015 states to 12015 states and 14305 transitions. [2022-12-14 14:52:37,419 INFO L78 Accepts]: Start accepts. Automaton has 12015 states and 14305 transitions. Word has length 229 [2022-12-14 14:52:37,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:37,419 INFO L495 AbstractCegarLoop]: Abstraction has 12015 states and 14305 transitions. [2022-12-14 14:52:37,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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) [2022-12-14 14:52:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 12015 states and 14305 transitions. [2022-12-14 14:52:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-12-14 14:52:37,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:37,429 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 14:52:37,429 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2087248089, now seen corresponding path program 1 times [2022-12-14 14:52:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:37,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524520427] [2022-12-14 14:52:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:37,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 14:52:37,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:37,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524520427] [2022-12-14 14:52:37,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524520427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:37,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250770991] [2022-12-14 14:52:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:37,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:37,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:37,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:37,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:52:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:37,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 14:52:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 14:52:37,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:52:37,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250770991] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:37,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:52:37,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 14:52:37,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769574131] [2022-12-14 14:52:37,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:52:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:52:37,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:52:37,996 INFO L87 Difference]: Start difference. First operand 12015 states and 14305 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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) [2022-12-14 14:52:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:38,623 INFO L93 Difference]: Finished difference Result 26174 states and 31190 transitions. [2022-12-14 14:52:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:52:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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 235 [2022-12-14 14:52:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:38,652 INFO L225 Difference]: With dead ends: 26174 [2022-12-14 14:52:38,652 INFO L226 Difference]: Without dead ends: 14160 [2022-12-14 14:52:38,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:52:38,659 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 351 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:38,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 228 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:52:38,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2022-12-14 14:52:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 14160. [2022-12-14 14:52:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14160 states, 14159 states have (on average 1.1790380676601455) internal successors, (16694), 14159 states have internal predecessors, (16694), 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) [2022-12-14 14:52:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14160 states to 14160 states and 16694 transitions. [2022-12-14 14:52:38,813 INFO L78 Accepts]: Start accepts. Automaton has 14160 states and 16694 transitions. Word has length 235 [2022-12-14 14:52:38,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:38,813 INFO L495 AbstractCegarLoop]: Abstraction has 14160 states and 16694 transitions. [2022-12-14 14:52:38,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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) [2022-12-14 14:52:38,813 INFO L276 IsEmpty]: Start isEmpty. Operand 14160 states and 16694 transitions. [2022-12-14 14:52:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-12-14 14:52:38,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:38,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:38,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:52:39,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 14:52:39,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash -643700913, now seen corresponding path program 1 times [2022-12-14 14:52:39,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:39,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543526245] [2022-12-14 14:52:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:39,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 14:52:39,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:39,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543526245] [2022-12-14 14:52:39,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543526245] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:39,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:39,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:52:39,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68408974] [2022-12-14 14:52:39,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:39,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:39,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:39,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:39,327 INFO L87 Difference]: Start difference. First operand 14160 states and 16694 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2022-12-14 14:52:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:39,872 INFO L93 Difference]: Finished difference Result 31610 states and 37083 transitions. [2022-12-14 14:52:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 242 [2022-12-14 14:52:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:39,886 INFO L225 Difference]: With dead ends: 31610 [2022-12-14 14:52:39,886 INFO L226 Difference]: Without dead ends: 17451 [2022-12-14 14:52:39,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:39,894 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:39,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 92 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:52:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17451 states. [2022-12-14 14:52:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17451 to 17449. [2022-12-14 14:52:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17449 states, 17448 states have (on average 1.1624254928931683) internal successors, (20282), 17448 states have internal predecessors, (20282), 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) [2022-12-14 14:52:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17449 states to 17449 states and 20282 transitions. [2022-12-14 14:52:40,113 INFO L78 Accepts]: Start accepts. Automaton has 17449 states and 20282 transitions. Word has length 242 [2022-12-14 14:52:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:40,113 INFO L495 AbstractCegarLoop]: Abstraction has 17449 states and 20282 transitions. [2022-12-14 14:52:40,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2022-12-14 14:52:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 17449 states and 20282 transitions. [2022-12-14 14:52:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-12-14 14:52:40,124 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:40,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:40,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 14:52:40,124 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:40,125 INFO L85 PathProgramCache]: Analyzing trace with hash 119548171, now seen corresponding path program 1 times [2022-12-14 14:52:40,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:40,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058424461] [2022-12-14 14:52:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:40,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:52:40,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:40,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058424461] [2022-12-14 14:52:40,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058424461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:40,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:40,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:52:40,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956273547] [2022-12-14 14:52:40,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:40,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:40,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:40,339 INFO L87 Difference]: Start difference. First operand 17449 states and 20282 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 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) [2022-12-14 14:52:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:40,812 INFO L93 Difference]: Finished difference Result 39332 states and 45946 transitions. [2022-12-14 14:52:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:40,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 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 264 [2022-12-14 14:52:40,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:40,830 INFO L225 Difference]: With dead ends: 39332 [2022-12-14 14:52:40,830 INFO L226 Difference]: Without dead ends: 22313 [2022-12-14 14:52:40,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:40,838 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:40,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 87 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:52:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22313 states. [2022-12-14 14:52:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22313 to 20738. [2022-12-14 14:52:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20738 states, 20737 states have (on average 1.1762067801514202) internal successors, (24391), 20737 states have internal predecessors, (24391), 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) [2022-12-14 14:52:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20738 states to 20738 states and 24391 transitions. [2022-12-14 14:52:41,049 INFO L78 Accepts]: Start accepts. Automaton has 20738 states and 24391 transitions. Word has length 264 [2022-12-14 14:52:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:41,050 INFO L495 AbstractCegarLoop]: Abstraction has 20738 states and 24391 transitions. [2022-12-14 14:52:41,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 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) [2022-12-14 14:52:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 20738 states and 24391 transitions. [2022-12-14 14:52:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-12-14 14:52:41,060 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:41,060 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:41,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 14:52:41,060 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1739246982, now seen corresponding path program 1 times [2022-12-14 14:52:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:41,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312764863] [2022-12-14 14:52:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:41,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:41,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:41,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312764863] [2022-12-14 14:52:41,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312764863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:41,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696701358] [2022-12-14 14:52:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:41,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:41,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:41,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:41,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:52:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:52:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:52:42,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:52:42,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696701358] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:42,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:52:42,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 14:52:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753477632] [2022-12-14 14:52:42,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:42,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:42,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:42,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:42,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:52:42,099 INFO L87 Difference]: Start difference. First operand 20738 states and 24391 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2022-12-14 14:52:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:42,737 INFO L93 Difference]: Finished difference Result 41475 states and 48955 transitions. [2022-12-14 14:52:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 271 [2022-12-14 14:52:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:42,753 INFO L225 Difference]: With dead ends: 41475 [2022-12-14 14:52:42,753 INFO L226 Difference]: Without dead ends: 21453 [2022-12-14 14:52:42,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:52:42,763 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:42,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 178 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:52:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21453 states. [2022-12-14 14:52:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21453 to 20881. [2022-12-14 14:52:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20881 states, 20880 states have (on average 1.178544061302682) internal successors, (24608), 20880 states have internal predecessors, (24608), 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) [2022-12-14 14:52:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20881 states to 20881 states and 24608 transitions. [2022-12-14 14:52:43,011 INFO L78 Accepts]: Start accepts. Automaton has 20881 states and 24608 transitions. Word has length 271 [2022-12-14 14:52:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:43,011 INFO L495 AbstractCegarLoop]: Abstraction has 20881 states and 24608 transitions. [2022-12-14 14:52:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2022-12-14 14:52:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 20881 states and 24608 transitions. [2022-12-14 14:52:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-12-14 14:52:43,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:43,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:43,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:52:43,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 14:52:43,225 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:43,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2133869654, now seen corresponding path program 1 times [2022-12-14 14:52:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806872983] [2022-12-14 14:52:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:43,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:43,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806872983] [2022-12-14 14:52:43,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806872983] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:43,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:43,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:52:43,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250500022] [2022-12-14 14:52:43,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:52:43,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:52:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:52:43,463 INFO L87 Difference]: Start difference. First operand 20881 states and 24608 transitions. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 3 states have internal predecessors, (293), 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) [2022-12-14 14:52:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:44,111 INFO L93 Difference]: Finished difference Result 54204 states and 63655 transitions. [2022-12-14 14:52:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:52:44,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 3 states have internal predecessors, (293), 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 293 [2022-12-14 14:52:44,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:44,139 INFO L225 Difference]: With dead ends: 54204 [2022-12-14 14:52:44,139 INFO L226 Difference]: Without dead ends: 34182 [2022-12-14 14:52:44,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:52:44,151 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 295 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:44,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 258 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:52:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34182 states. [2022-12-14 14:52:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34182 to 28460. [2022-12-14 14:52:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28460 states, 28459 states have (on average 1.1892195790435363) internal successors, (33844), 28459 states have internal predecessors, (33844), 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) [2022-12-14 14:52:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28460 states to 28460 states and 33844 transitions. [2022-12-14 14:52:44,491 INFO L78 Accepts]: Start accepts. Automaton has 28460 states and 33844 transitions. Word has length 293 [2022-12-14 14:52:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:44,491 INFO L495 AbstractCegarLoop]: Abstraction has 28460 states and 33844 transitions. [2022-12-14 14:52:44,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 3 states have internal predecessors, (293), 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) [2022-12-14 14:52:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 28460 states and 33844 transitions. [2022-12-14 14:52:44,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-12-14 14:52:44,506 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:44,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:44,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 14:52:44,507 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:44,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:44,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1524415921, now seen corresponding path program 1 times [2022-12-14 14:52:44,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:44,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883312181] [2022-12-14 14:52:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:44,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 173 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:45,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:45,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883312181] [2022-12-14 14:52:45,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883312181] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:45,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745072666] [2022-12-14 14:52:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:45,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:45,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:45,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:45,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:52:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:45,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:52:45,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 161 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:52:45,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:52:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 161 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:52:45,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745072666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:52:45,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477245985] [2022-12-14 14:52:45,540 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 14:52:45,540 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:52:45,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:52:45,548 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:52:45,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:58:23,798 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 14:58:23,921 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 22272 conjuctions. This might take some time... [2022-12-14 14:58:25,789 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 832 conjuctions. [2022-12-14 14:58:25,828 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 14:58:25,978 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 22272 conjuctions. This might take some time... [2022-12-14 14:58:28,016 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 832 conjuctions. [2022-12-14 14:58:28,745 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 14:58:28,855 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 22272 conjuctions. This might take some time... [2022-12-14 14:58:30,605 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 832 conjuctions. [2022-12-14 14:59:03,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:59:26,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [477245985] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:26,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:59:26,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 3, 3] total 12 [2022-12-14 14:59:26,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563498018] [2022-12-14 14:59:26,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:26,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:59:26,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:26,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:59:26,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:59:26,400 INFO L87 Difference]: Start difference. First operand 28460 states and 33844 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 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) [2022-12-14 14:59:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:30,988 INFO L93 Difference]: Finished difference Result 56501 states and 67300 transitions. [2022-12-14 14:59:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:59:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 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 305 [2022-12-14 14:59:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:31,011 INFO L225 Difference]: With dead ends: 56501 [2022-12-14 14:59:31,011 INFO L226 Difference]: Without dead ends: 28900 [2022-12-14 14:59:31,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 633 SyntacticMatches, 273 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:59:31,027 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 279 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:31,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 99 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 14:59:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28900 states. [2022-12-14 14:59:31,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28900 to 28748. [2022-12-14 14:59:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28748 states, 28747 states have (on average 1.1899676487981354) internal successors, (34208), 28747 states have internal predecessors, (34208), 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) [2022-12-14 14:59:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28748 states to 28748 states and 34208 transitions. [2022-12-14 14:59:31,350 INFO L78 Accepts]: Start accepts. Automaton has 28748 states and 34208 transitions. Word has length 305 [2022-12-14 14:59:31,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:31,350 INFO L495 AbstractCegarLoop]: Abstraction has 28748 states and 34208 transitions. [2022-12-14 14:59:31,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 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) [2022-12-14 14:59:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 28748 states and 34208 transitions. [2022-12-14 14:59:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-12-14 14:59:31,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:31,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:31,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:59:31,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 14:59:31,566 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:31,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1239795939, now seen corresponding path program 1 times [2022-12-14 14:59:31,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:31,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972648609] [2022-12-14 14:59:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:31,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:59:31,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972648609] [2022-12-14 14:59:31,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972648609] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:31,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:59:31,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:59:31,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025691974] [2022-12-14 14:59:31,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:31,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:59:31,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:59:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:59:31,889 INFO L87 Difference]: Start difference. First operand 28748 states and 34208 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 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) [2022-12-14 14:59:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:32,618 INFO L93 Difference]: Finished difference Result 58208 states and 69157 transitions. [2022-12-14 14:59:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:59:32,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 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 311 [2022-12-14 14:59:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:32,640 INFO L225 Difference]: With dead ends: 58208 [2022-12-14 14:59:32,640 INFO L226 Difference]: Without dead ends: 30607 [2022-12-14 14:59:32,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:59:32,654 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 143 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:32,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 35 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:59:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30607 states. [2022-12-14 14:59:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30607 to 30607. [2022-12-14 14:59:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30607 states, 30606 states have (on average 1.1805201594458603) internal successors, (36131), 30606 states have internal predecessors, (36131), 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) [2022-12-14 14:59:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30607 states to 30607 states and 36131 transitions. [2022-12-14 14:59:33,029 INFO L78 Accepts]: Start accepts. Automaton has 30607 states and 36131 transitions. Word has length 311 [2022-12-14 14:59:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:33,029 INFO L495 AbstractCegarLoop]: Abstraction has 30607 states and 36131 transitions. [2022-12-14 14:59:33,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 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) [2022-12-14 14:59:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 30607 states and 36131 transitions. [2022-12-14 14:59:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-12-14 14:59:33,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:33,047 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:33,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 14:59:33,048 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash 315635283, now seen corresponding path program 1 times [2022-12-14 14:59:33,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:33,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802500373] [2022-12-14 14:59:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:33,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 14:59:33,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:33,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802500373] [2022-12-14 14:59:33,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802500373] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:33,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:59:33,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:59:33,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767834774] [2022-12-14 14:59:33,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:33,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:59:33,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:33,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:59:33,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:59:33,413 INFO L87 Difference]: Start difference. First operand 30607 states and 36131 transitions. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 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) [2022-12-14 14:59:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:34,380 INFO L93 Difference]: Finished difference Result 61068 states and 72229 transitions. [2022-12-14 14:59:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:59:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 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 315 [2022-12-14 14:59:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:34,407 INFO L225 Difference]: With dead ends: 61068 [2022-12-14 14:59:34,407 INFO L226 Difference]: Without dead ends: 28748 [2022-12-14 14:59:34,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:59:34,424 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:34,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 59 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 14:59:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28748 states. [2022-12-14 14:59:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28748 to 27175. [2022-12-14 14:59:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27175 states, 27174 states have (on average 1.1279899904320305) internal successors, (30652), 27174 states have internal predecessors, (30652), 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) [2022-12-14 14:59:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27175 states to 27175 states and 30652 transitions. [2022-12-14 14:59:34,743 INFO L78 Accepts]: Start accepts. Automaton has 27175 states and 30652 transitions. Word has length 315 [2022-12-14 14:59:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:34,743 INFO L495 AbstractCegarLoop]: Abstraction has 27175 states and 30652 transitions. [2022-12-14 14:59:34,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 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) [2022-12-14 14:59:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 27175 states and 30652 transitions. [2022-12-14 14:59:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-12-14 14:59:34,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:34,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:34,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 14:59:34,756 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:34,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1872912322, now seen corresponding path program 1 times [2022-12-14 14:59:34,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:34,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499894391] [2022-12-14 14:59:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:34,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:59:35,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:35,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499894391] [2022-12-14 14:59:35,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499894391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:35,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:59:35,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:59:35,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572201593] [2022-12-14 14:59:35,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:35,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:59:35,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:35,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:59:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:59:35,025 INFO L87 Difference]: Start difference. First operand 27175 states and 30652 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2022-12-14 14:59:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:35,548 INFO L93 Difference]: Finished difference Result 55777 states and 63356 transitions. [2022-12-14 14:59:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:59:35,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 324 [2022-12-14 14:59:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:35,575 INFO L225 Difference]: With dead ends: 55777 [2022-12-14 14:59:35,575 INFO L226 Difference]: Without dead ends: 29749 [2022-12-14 14:59:35,588 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:59:35,588 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:35,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 171 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:59:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29749 states. [2022-12-14 14:59:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29749 to 29604. [2022-12-14 14:59:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29604 states, 29603 states have (on average 1.1358983886768232) internal successors, (33626), 29603 states have internal predecessors, (33626), 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) [2022-12-14 14:59:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29604 states to 29604 states and 33626 transitions. [2022-12-14 14:59:35,895 INFO L78 Accepts]: Start accepts. Automaton has 29604 states and 33626 transitions. Word has length 324 [2022-12-14 14:59:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:35,896 INFO L495 AbstractCegarLoop]: Abstraction has 29604 states and 33626 transitions. [2022-12-14 14:59:35,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2022-12-14 14:59:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 29604 states and 33626 transitions. [2022-12-14 14:59:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-12-14 14:59:35,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:35,909 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:35,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 14:59:35,909 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash -353150983, now seen corresponding path program 1 times [2022-12-14 14:59:35,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:35,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979923837] [2022-12-14 14:59:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 273 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 14:59:36,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979923837] [2022-12-14 14:59:36,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979923837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:59:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55328888] [2022-12-14 14:59:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:36,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:59:36,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:59:36,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:59:36,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:59:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:36,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:59:36,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:59:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 14:59:36,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:59:36,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55328888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:36,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:59:36,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 14:59:36,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250488687] [2022-12-14 14:59:36,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:36,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:59:36,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:59:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:59:36,415 INFO L87 Difference]: Start difference. First operand 29604 states and 33626 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-12-14 14:59:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:37,079 INFO L93 Difference]: Finished difference Result 67932 states and 77724 transitions. [2022-12-14 14:59:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:59:37,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 344 [2022-12-14 14:59:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:37,110 INFO L225 Difference]: With dead ends: 67932 [2022-12-14 14:59:37,110 INFO L226 Difference]: Without dead ends: 39473 [2022-12-14 14:59:37,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:59:37,125 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 124 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:37,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 55 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:59:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39473 states. [2022-12-14 14:59:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39473 to 36611. [2022-12-14 14:59:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36611 states, 36610 states have (on average 1.135973777656378) internal successors, (41588), 36610 states have internal predecessors, (41588), 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) [2022-12-14 14:59:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36611 states to 36611 states and 41588 transitions. [2022-12-14 14:59:37,532 INFO L78 Accepts]: Start accepts. Automaton has 36611 states and 41588 transitions. Word has length 344 [2022-12-14 14:59:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:37,532 INFO L495 AbstractCegarLoop]: Abstraction has 36611 states and 41588 transitions. [2022-12-14 14:59:37,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-12-14 14:59:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 36611 states and 41588 transitions. [2022-12-14 14:59:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-12-14 14:59:37,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:37,547 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:37,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:59:37,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 14:59:37,748 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash -176103238, now seen corresponding path program 1 times [2022-12-14 14:59:37,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:37,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252409867] [2022-12-14 14:59:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:37,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-14 14:59:37,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:37,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252409867] [2022-12-14 14:59:37,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252409867] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:37,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:59:37,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:59:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541600570] [2022-12-14 14:59:37,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:37,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:59:37,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:59:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:59:37,938 INFO L87 Difference]: Start difference. First operand 36611 states and 41588 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2022-12-14 14:59:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:38,469 INFO L93 Difference]: Finished difference Result 72935 states and 82868 transitions. [2022-12-14 14:59:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:59:38,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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 350 [2022-12-14 14:59:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:38,499 INFO L225 Difference]: With dead ends: 72935 [2022-12-14 14:59:38,500 INFO L226 Difference]: Without dead ends: 37040 [2022-12-14 14:59:38,567 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:59:38,568 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:38,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 199 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:59:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37040 states. [2022-12-14 14:59:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37040 to 33179. [2022-12-14 14:59:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33179 states, 33178 states have (on average 1.1190246548917957) internal successors, (37127), 33178 states have internal predecessors, (37127), 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) [2022-12-14 14:59:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33179 states to 33179 states and 37127 transitions. [2022-12-14 14:59:39,074 INFO L78 Accepts]: Start accepts. Automaton has 33179 states and 37127 transitions. Word has length 350 [2022-12-14 14:59:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:39,074 INFO L495 AbstractCegarLoop]: Abstraction has 33179 states and 37127 transitions. [2022-12-14 14:59:39,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2022-12-14 14:59:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 33179 states and 37127 transitions. [2022-12-14 14:59:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-12-14 14:59:39,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:39,087 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:39,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 14:59:39,088 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:39,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash 681450765, now seen corresponding path program 1 times [2022-12-14 14:59:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334312371] [2022-12-14 14:59:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 14:59:39,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:39,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334312371] [2022-12-14 14:59:39,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334312371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:39,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:59:39,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:59:39,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488344192] [2022-12-14 14:59:39,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:39,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:59:39,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:39,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:59:39,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:59:39,273 INFO L87 Difference]: Start difference. First operand 33179 states and 37127 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-12-14 14:59:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:39,908 INFO L93 Difference]: Finished difference Result 66357 states and 74354 transitions. [2022-12-14 14:59:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:59:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 371 [2022-12-14 14:59:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:39,936 INFO L225 Difference]: With dead ends: 66357 [2022-12-14 14:59:39,936 INFO L226 Difference]: Without dead ends: 34180 [2022-12-14 14:59:39,947 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:59:39,947 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 115 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:39,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 53 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:59:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34180 states. [2022-12-14 14:59:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34180 to 25743. [2022-12-14 14:59:40,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25743 states, 25742 states have (on average 1.110247843990366) internal successors, (28580), 25742 states have internal predecessors, (28580), 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) [2022-12-14 14:59:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25743 states to 25743 states and 28580 transitions. [2022-12-14 14:59:40,254 INFO L78 Accepts]: Start accepts. Automaton has 25743 states and 28580 transitions. Word has length 371 [2022-12-14 14:59:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:40,254 INFO L495 AbstractCegarLoop]: Abstraction has 25743 states and 28580 transitions. [2022-12-14 14:59:40,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-12-14 14:59:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 25743 states and 28580 transitions. [2022-12-14 14:59:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-12-14 14:59:40,266 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:40,266 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:40,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 14:59:40,267 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:40,267 INFO L85 PathProgramCache]: Analyzing trace with hash -741200980, now seen corresponding path program 1 times [2022-12-14 14:59:40,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:40,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421319218] [2022-12-14 14:59:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:40,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 347 proven. 18 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 14:59:40,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:40,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421319218] [2022-12-14 14:59:40,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421319218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:59:40,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984382805] [2022-12-14 14:59:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:40,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:59:40,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:59:40,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:59:40,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:59:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:40,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:59:40,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:59:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 14:59:40,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:59:40,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984382805] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:40,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:59:40,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 14:59:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242397105] [2022-12-14 14:59:40,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:40,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:59:40,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:59:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:59:40,894 INFO L87 Difference]: Start difference. First operand 25743 states and 28580 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-12-14 14:59:41,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:41,270 INFO L93 Difference]: Finished difference Result 66645 states and 73923 transitions. [2022-12-14 14:59:41,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:59:41,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 383 [2022-12-14 14:59:41,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:41,307 INFO L225 Difference]: With dead ends: 66645 [2022-12-14 14:59:41,308 INFO L226 Difference]: Without dead ends: 41618 [2022-12-14 14:59:41,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:59:41,321 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 144 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:41,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 473 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:59:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41618 states. [2022-12-14 14:59:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41618 to 40472. [2022-12-14 14:59:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40472 states, 40471 states have (on average 1.1013812359467272) internal successors, (44574), 40471 states have internal predecessors, (44574), 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) [2022-12-14 14:59:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40472 states to 40472 states and 44574 transitions. [2022-12-14 14:59:41,752 INFO L78 Accepts]: Start accepts. Automaton has 40472 states and 44574 transitions. Word has length 383 [2022-12-14 14:59:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:41,752 INFO L495 AbstractCegarLoop]: Abstraction has 40472 states and 44574 transitions. [2022-12-14 14:59:41,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-12-14 14:59:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40472 states and 44574 transitions. [2022-12-14 14:59:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-12-14 14:59:41,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:41,773 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:41,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:59:41,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 14:59:41,975 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:41,977 INFO L85 PathProgramCache]: Analyzing trace with hash -35988957, now seen corresponding path program 2 times [2022-12-14 14:59:41,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:41,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049281192] [2022-12-14 14:59:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:41,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-12-14 14:59:42,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:42,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049281192] [2022-12-14 14:59:42,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049281192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:42,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:59:42,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:59:42,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985665351] [2022-12-14 14:59:42,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:42,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:59:42,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:42,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:59:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:59:42,261 INFO L87 Difference]: Start difference. First operand 40472 states and 44574 transitions. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 3 states have internal predecessors, (254), 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) [2022-12-14 14:59:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:43,356 INFO L93 Difference]: Finished difference Result 110546 states and 121221 transitions. [2022-12-14 14:59:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:59:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 3 states have internal predecessors, (254), 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 384 [2022-12-14 14:59:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:43,423 INFO L225 Difference]: With dead ends: 110546 [2022-12-14 14:59:43,423 INFO L226 Difference]: Without dead ends: 70504 [2022-12-14 14:59:43,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:59:43,449 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 349 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:43,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 170 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:59:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70504 states. [2022-12-14 14:59:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70504 to 62038. [2022-12-14 14:59:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62038 states, 62037 states have (on average 1.097296774505537) internal successors, (68073), 62037 states have internal predecessors, (68073), 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) [2022-12-14 14:59:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62038 states to 62038 states and 68073 transitions. [2022-12-14 14:59:44,363 INFO L78 Accepts]: Start accepts. Automaton has 62038 states and 68073 transitions. Word has length 384 [2022-12-14 14:59:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:44,364 INFO L495 AbstractCegarLoop]: Abstraction has 62038 states and 68073 transitions. [2022-12-14 14:59:44,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 3 states have internal predecessors, (254), 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) [2022-12-14 14:59:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 62038 states and 68073 transitions. [2022-12-14 14:59:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-12-14 14:59:44,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:44,383 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:44,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 14:59:44,384 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1016481769, now seen corresponding path program 1 times [2022-12-14 14:59:44,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:44,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286877807] [2022-12-14 14:59:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 311 proven. 18 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 14:59:44,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:44,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286877807] [2022-12-14 14:59:44,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286877807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:59:44,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879810136] [2022-12-14 14:59:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:44,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:59:44,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:59:44,786 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:59:44,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:59:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:45,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:59:45,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:59:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 14:59:45,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:59:45,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879810136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:45,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:59:45,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 14:59:45,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678817306] [2022-12-14 14:59:45,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:45,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:59:45,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:45,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:59:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:59:45,057 INFO L87 Difference]: Start difference. First operand 62038 states and 68073 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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) [2022-12-14 14:59:45,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:45,679 INFO L93 Difference]: Finished difference Result 136974 states and 150199 transitions. [2022-12-14 14:59:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:59:45,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 387 [2022-12-14 14:59:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:45,747 INFO L225 Difference]: With dead ends: 136974 [2022-12-14 14:59:45,747 INFO L226 Difference]: Without dead ends: 73337 [2022-12-14 14:59:45,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:59:45,775 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 147 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:45,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 433 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:59:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73337 states. [2022-12-14 14:59:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73337 to 66328. [2022-12-14 14:59:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66328 states, 66327 states have (on average 1.089269829782743) internal successors, (72248), 66327 states have internal predecessors, (72248), 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) [2022-12-14 14:59:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66328 states to 66328 states and 72248 transitions. [2022-12-14 14:59:46,609 INFO L78 Accepts]: Start accepts. Automaton has 66328 states and 72248 transitions. Word has length 387 [2022-12-14 14:59:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:46,610 INFO L495 AbstractCegarLoop]: Abstraction has 66328 states and 72248 transitions. [2022-12-14 14:59:46,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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) [2022-12-14 14:59:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 66328 states and 72248 transitions. [2022-12-14 14:59:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-12-14 14:59:46,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:46,625 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:46,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:59:46,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:59:46,828 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -179171056, now seen corresponding path program 1 times [2022-12-14 14:59:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:46,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97989714] [2022-12-14 14:59:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:46,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-14 14:59:47,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:47,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97989714] [2022-12-14 14:59:47,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97989714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:47,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:59:47,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:59:47,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939594691] [2022-12-14 14:59:47,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:47,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:59:47,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:47,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:59:47,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:59:47,385 INFO L87 Difference]: Start difference. First operand 66328 states and 72248 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 2 states have internal predecessors, (284), 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) [2022-12-14 14:59:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:48,027 INFO L93 Difference]: Finished difference Result 131824 states and 143606 transitions. [2022-12-14 14:59:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:59:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 2 states have internal predecessors, (284), 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 387 [2022-12-14 14:59:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:48,084 INFO L225 Difference]: With dead ends: 131824 [2022-12-14 14:59:48,084 INFO L226 Difference]: Without dead ends: 66471 [2022-12-14 14:59:48,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:59:48,112 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:48,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:59:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66471 states. [2022-12-14 14:59:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66471 to 66328. [2022-12-14 14:59:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66328 states, 66327 states have (on average 1.089239676149984) internal successors, (72246), 66327 states have internal predecessors, (72246), 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) [2022-12-14 14:59:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66328 states to 66328 states and 72246 transitions. [2022-12-14 14:59:49,137 INFO L78 Accepts]: Start accepts. Automaton has 66328 states and 72246 transitions. Word has length 387 [2022-12-14 14:59:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:49,137 INFO L495 AbstractCegarLoop]: Abstraction has 66328 states and 72246 transitions. [2022-12-14 14:59:49,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 2 states have internal predecessors, (284), 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) [2022-12-14 14:59:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 66328 states and 72246 transitions. [2022-12-14 14:59:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-12-14 14:59:49,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:49,165 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:49,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 14:59:49,165 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2134516971, now seen corresponding path program 1 times [2022-12-14 14:59:49,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:49,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700610550] [2022-12-14 14:59:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:49,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 262 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-14 14:59:50,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:50,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700610550] [2022-12-14 14:59:50,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700610550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:59:50,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952043661] [2022-12-14 14:59:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:50,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:59:50,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:59:50,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:59:50,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:59:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:59:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:59:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-14 14:59:51,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:59:51,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952043661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:51,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:59:51,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 14:59:51,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606844443] [2022-12-14 14:59:51,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:51,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:59:51,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:51,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:59:51,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:59:51,231 INFO L87 Difference]: Start difference. First operand 66328 states and 72246 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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) [2022-12-14 14:59:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:51,994 INFO L93 Difference]: Finished difference Result 132825 states and 144647 transitions. [2022-12-14 14:59:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:59:51,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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 394 [2022-12-14 14:59:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:52,053 INFO L225 Difference]: With dead ends: 132825 [2022-12-14 14:59:52,053 INFO L226 Difference]: Without dead ends: 67472 [2022-12-14 14:59:52,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:59:52,081 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:52,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 216 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:59:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67472 states. [2022-12-14 14:59:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67472 to 66042. [2022-12-14 14:59:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66042 states, 66041 states have (on average 1.0887327569237293) internal successors, (71901), 66041 states have internal predecessors, (71901), 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) [2022-12-14 14:59:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66042 states to 66042 states and 71901 transitions. [2022-12-14 14:59:52,949 INFO L78 Accepts]: Start accepts. Automaton has 66042 states and 71901 transitions. Word has length 394 [2022-12-14 14:59:52,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:52,950 INFO L495 AbstractCegarLoop]: Abstraction has 66042 states and 71901 transitions. [2022-12-14 14:59:52,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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) [2022-12-14 14:59:52,950 INFO L276 IsEmpty]: Start isEmpty. Operand 66042 states and 71901 transitions. [2022-12-14 14:59:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-12-14 14:59:52,967 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:52,967 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 14:59:52,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 14:59:53,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 14:59:53,169 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:53,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash -368634782, now seen corresponding path program 1 times [2022-12-14 14:59:53,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:53,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673552260] [2022-12-14 14:59:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:53,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:59:53,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:53,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673552260] [2022-12-14 14:59:53,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673552260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:53,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:59:53,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:59:53,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679887395] [2022-12-14 14:59:53,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:59:53,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:59:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:59:53,651 INFO L87 Difference]: Start difference. First operand 66042 states and 71901 transitions. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 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) [2022-12-14 14:59:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:54,476 INFO L93 Difference]: Finished difference Result 132110 states and 143686 transitions. [2022-12-14 14:59:54,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:59:54,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 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 395 [2022-12-14 14:59:54,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:54,534 INFO L225 Difference]: With dead ends: 132110 [2022-12-14 14:59:54,535 INFO L226 Difference]: Without dead ends: 63897 [2022-12-14 14:59:54,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:59:54,566 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 169 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:54,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 10 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:59:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63897 states. [2022-12-14 14:59:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63897 to 52457. [2022-12-14 14:59:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52457 states, 52456 states have (on average 1.0762734482232728) internal successors, (56457), 52456 states have internal predecessors, (56457), 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) [2022-12-14 14:59:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52457 states to 52457 states and 56457 transitions. [2022-12-14 14:59:55,268 INFO L78 Accepts]: Start accepts. Automaton has 52457 states and 56457 transitions. Word has length 395 [2022-12-14 14:59:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:55,269 INFO L495 AbstractCegarLoop]: Abstraction has 52457 states and 56457 transitions. [2022-12-14 14:59:55,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 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) [2022-12-14 14:59:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 52457 states and 56457 transitions. [2022-12-14 14:59:55,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-12-14 14:59:55,279 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:55,279 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 14:59:55,280 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:55,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:55,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2036449769, now seen corresponding path program 1 times [2022-12-14 14:59:55,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:55,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910598235] [2022-12-14 14:59:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 415 proven. 18 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 14:59:55,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:55,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910598235] [2022-12-14 14:59:55,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910598235] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:59:55,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029614160] [2022-12-14 14:59:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:55,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:59:55,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:59:55,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:59:55,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:59:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 14:59:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:59:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 14:59:56,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:59:56,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029614160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:56,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:59:56,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 14:59:56,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430625057] [2022-12-14 14:59:56,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:56,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:59:56,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:59:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:59:56,042 INFO L87 Difference]: Start difference. First operand 52457 states and 56457 transitions. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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) [2022-12-14 14:59:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:59:57,002 INFO L93 Difference]: Finished difference Result 108658 states and 116657 transitions. [2022-12-14 14:59:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:59:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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 401 [2022-12-14 14:59:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:59:57,055 INFO L225 Difference]: With dead ends: 108658 [2022-12-14 14:59:57,055 INFO L226 Difference]: Without dead ends: 56747 [2022-12-14 14:59:57,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:59:57,076 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 321 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:59:57,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 178 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:59:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56747 states. [2022-12-14 14:59:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56747 to 53172. [2022-12-14 14:59:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53172 states, 53171 states have (on average 1.0733670609918942) internal successors, (57072), 53171 states have internal predecessors, (57072), 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) [2022-12-14 14:59:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53172 states to 53172 states and 57072 transitions. [2022-12-14 14:59:57,972 INFO L78 Accepts]: Start accepts. Automaton has 53172 states and 57072 transitions. Word has length 401 [2022-12-14 14:59:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:59:57,972 INFO L495 AbstractCegarLoop]: Abstraction has 53172 states and 57072 transitions. [2022-12-14 14:59:57,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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) [2022-12-14 14:59:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 53172 states and 57072 transitions. [2022-12-14 14:59:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-12-14 14:59:57,988 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:59:57,988 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:59:57,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:59:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:59:58,190 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:59:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:59:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash 146390069, now seen corresponding path program 1 times [2022-12-14 14:59:58,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:59:58,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575738844] [2022-12-14 14:59:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:58,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:59:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 332 proven. 36 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-12-14 14:59:58,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:59:58,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575738844] [2022-12-14 14:59:58,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575738844] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:59:58,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301438954] [2022-12-14 14:59:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:59:58,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:59:58,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:59:58,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:59:58,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:59:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:59:59,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 14:59:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:59:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 14:59:59,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:59:59,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301438954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:59:59,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:59:59,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-12-14 14:59:59,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522848138] [2022-12-14 14:59:59,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:59:59,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:59:59,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:59:59,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:59:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:59:59,357 INFO L87 Difference]: Start difference. First operand 53172 states and 57072 transitions. Second operand has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 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) [2022-12-14 15:00:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:00:00,483 INFO L93 Difference]: Finished difference Result 154992 states and 166422 transitions. [2022-12-14 15:00:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:00:00,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 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 404 [2022-12-14 15:00:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:00:00,574 INFO L225 Difference]: With dead ends: 154992 [2022-12-14 15:00:00,575 INFO L226 Difference]: Without dead ends: 101937 [2022-12-14 15:00:00,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:00:00,606 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 448 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:00:00,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 280 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:00:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101937 states. [2022-12-14 15:00:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101937 to 88064. [2022-12-14 15:00:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88064 states, 88063 states have (on average 1.0773196461624064) internal successors, (94872), 88063 states have internal predecessors, (94872), 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) [2022-12-14 15:00:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88064 states to 88064 states and 94872 transitions. [2022-12-14 15:00:01,747 INFO L78 Accepts]: Start accepts. Automaton has 88064 states and 94872 transitions. Word has length 404 [2022-12-14 15:00:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:00:01,748 INFO L495 AbstractCegarLoop]: Abstraction has 88064 states and 94872 transitions. [2022-12-14 15:00:01,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 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) [2022-12-14 15:00:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 88064 states and 94872 transitions. [2022-12-14 15:00:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-12-14 15:00:01,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:00:01,761 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:00:01,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:00:01,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:00:01,962 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:00:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:00:01,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1815079162, now seen corresponding path program 1 times [2022-12-14 15:00:01,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:00:01,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740111061] [2022-12-14 15:00:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:00:01,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:00:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:00:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-12-14 15:00:02,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:00:02,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740111061] [2022-12-14 15:00:02,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740111061] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:00:02,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:00:02,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:00:02,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915548954] [2022-12-14 15:00:02,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:00:02,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:00:02,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:00:02,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:00:02,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:00:02,269 INFO L87 Difference]: Start difference. First operand 88064 states and 94872 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 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) [2022-12-14 15:00:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:00:03,447 INFO L93 Difference]: Finished difference Result 209618 states and 225723 transitions. [2022-12-14 15:00:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:00:03,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 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 426 [2022-12-14 15:00:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:00:03,564 INFO L225 Difference]: With dead ends: 209618 [2022-12-14 15:00:03,564 INFO L226 Difference]: Without dead ends: 122100 [2022-12-14 15:00:03,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:00:03,600 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:00:03,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 62 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:00:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122100 states. [2022-12-14 15:00:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122100 to 90638. [2022-12-14 15:00:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90638 states, 90637 states have (on average 1.0775731765173164) internal successors, (97668), 90637 states have internal predecessors, (97668), 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) [2022-12-14 15:00:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90638 states to 90638 states and 97668 transitions. [2022-12-14 15:00:04,792 INFO L78 Accepts]: Start accepts. Automaton has 90638 states and 97668 transitions. Word has length 426 [2022-12-14 15:00:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:00:04,792 INFO L495 AbstractCegarLoop]: Abstraction has 90638 states and 97668 transitions. [2022-12-14 15:00:04,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 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) [2022-12-14 15:00:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 90638 states and 97668 transitions. [2022-12-14 15:00:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-12-14 15:00:04,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:00:04,805 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:00:04,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 15:00:04,805 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:00:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:00:04,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1722948508, now seen corresponding path program 1 times [2022-12-14 15:00:04,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:00:04,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027125100] [2022-12-14 15:00:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:00:04,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:00:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:00:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 358 proven. 133 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 15:00:05,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:00:05,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027125100] [2022-12-14 15:00:05,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027125100] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:00:05,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783209125] [2022-12-14 15:00:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:00:05,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:00:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:00:05,264 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:00:05,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:00:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:00:05,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:00:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:00:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 527 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:00:05,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:00:05,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783209125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:00:05,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:00:05,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-12-14 15:00:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998062538] [2022-12-14 15:00:05,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:00:05,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:00:05,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:00:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:00:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:00:05,744 INFO L87 Difference]: Start difference. First operand 90638 states and 97668 transitions. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 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) [2022-12-14 15:00:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:00:07,206 INFO L93 Difference]: Finished difference Result 202182 states and 217801 transitions. [2022-12-14 15:00:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:00:07,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 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 432 [2022-12-14 15:00:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:00:07,322 INFO L225 Difference]: With dead ends: 202182 [2022-12-14 15:00:07,323 INFO L226 Difference]: Without dead ends: 111089 [2022-12-14 15:00:07,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:00:07,364 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 172 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:00:07,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 186 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:00:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111089 states. [2022-12-14 15:00:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111089 to 97644. [2022-12-14 15:00:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97644 states, 97643 states have (on average 1.0793707690259415) internal successors, (105393), 97643 states have internal predecessors, (105393), 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) [2022-12-14 15:00:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97644 states to 97644 states and 105393 transitions. [2022-12-14 15:00:08,837 INFO L78 Accepts]: Start accepts. Automaton has 97644 states and 105393 transitions. Word has length 432 [2022-12-14 15:00:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:00:08,837 INFO L495 AbstractCegarLoop]: Abstraction has 97644 states and 105393 transitions. [2022-12-14 15:00:08,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 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) [2022-12-14 15:00:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 97644 states and 105393 transitions. [2022-12-14 15:00:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-12-14 15:00:08,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:00:08,964 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:00:08,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 15:00:09,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:00:09,172 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:00:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:00:09,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1778812209, now seen corresponding path program 1 times [2022-12-14 15:00:09,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:00:09,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858910498] [2022-12-14 15:00:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:00:09,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:00:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:00:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 341 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:00:09,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:00:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858910498] [2022-12-14 15:00:09,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858910498] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:00:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138880462] [2022-12-14 15:00:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:00:09,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:00:09,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:00:09,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:00:09,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:00:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:00:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:00:10,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:00:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 514 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:00:10,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:00:10,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138880462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:00:10,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:00:10,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 15:00:10,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610010150] [2022-12-14 15:00:10,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:00:10,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:00:10,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:00:10,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:00:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:00:10,299 INFO L87 Difference]: Start difference. First operand 97644 states and 105393 transitions. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 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) [2022-12-14 15:00:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:00:11,438 INFO L93 Difference]: Finished difference Result 201464 states and 217239 transitions. [2022-12-14 15:00:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:00:11,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 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 432 [2022-12-14 15:00:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:00:11,540 INFO L225 Difference]: With dead ends: 201464 [2022-12-14 15:00:11,540 INFO L226 Difference]: Without dead ends: 103936 [2022-12-14 15:00:11,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:00:11,582 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:00:11,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 26 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:00:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103936 states. [2022-12-14 15:00:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103936 to 97501. [2022-12-14 15:00:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97501 states, 97500 states have (on average 1.079076923076923) internal successors, (105210), 97500 states have internal predecessors, (105210), 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) [2022-12-14 15:00:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97501 states to 97501 states and 105210 transitions. [2022-12-14 15:00:12,760 INFO L78 Accepts]: Start accepts. Automaton has 97501 states and 105210 transitions. Word has length 432 [2022-12-14 15:00:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:00:12,760 INFO L495 AbstractCegarLoop]: Abstraction has 97501 states and 105210 transitions. [2022-12-14 15:00:12,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 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) [2022-12-14 15:00:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 97501 states and 105210 transitions. [2022-12-14 15:00:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-12-14 15:00:12,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:00:12,774 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:00:12,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 15:00:12,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 15:00:12,976 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:00:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:00:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash 815972705, now seen corresponding path program 1 times [2022-12-14 15:00:12,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:00:12,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678286143] [2022-12-14 15:00:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:00:12,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:00:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:00:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 282 proven. 6 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-12-14 15:00:14,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:00:14,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678286143] [2022-12-14 15:00:14,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678286143] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:00:14,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600679598] [2022-12-14 15:00:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:00:14,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:00:14,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:00:14,389 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:00:14,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:00:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:00:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:00:14,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:00:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 289 proven. 74 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-12-14 15:00:14,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:00:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 289 proven. 74 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-12-14 15:00:14,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600679598] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:00:14,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [110893586] [2022-12-14 15:00:14,976 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 15:00:14,976 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:00:14,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:00:14,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:00:14,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:00:45,022 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 15:00:45,069 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 15:00:45,181 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 15:00:47,653 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:01:02,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [110893586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:02,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:01:02,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 3, 3] total 14 [2022-12-14 15:01:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733905849] [2022-12-14 15:01:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:02,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:01:02,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:02,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:01:02,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:01:02,557 INFO L87 Difference]: Start difference. First operand 97501 states and 105210 transitions. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 9 states have internal predecessors, (148), 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) [2022-12-14 15:01:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:05,286 INFO L93 Difference]: Finished difference Result 194760 states and 210161 transitions. [2022-12-14 15:01:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:01:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 9 states have internal predecessors, (148), 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 433 [2022-12-14 15:01:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:05,377 INFO L225 Difference]: With dead ends: 194760 [2022-12-14 15:01:05,378 INFO L226 Difference]: Without dead ends: 97661 [2022-12-14 15:01:05,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 987 SyntacticMatches, 301 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:01:05,424 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 226 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:05,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 64 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 15:01:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97661 states. [2022-12-14 15:01:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97661 to 97623. [2022-12-14 15:01:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97623 states, 97622 states have (on average 1.0789883427915838) internal successors, (105333), 97622 states have internal predecessors, (105333), 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) [2022-12-14 15:01:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97623 states to 97623 states and 105333 transitions. [2022-12-14 15:01:06,648 INFO L78 Accepts]: Start accepts. Automaton has 97623 states and 105333 transitions. Word has length 433 [2022-12-14 15:01:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:06,648 INFO L495 AbstractCegarLoop]: Abstraction has 97623 states and 105333 transitions. [2022-12-14 15:01:06,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 9 states have internal predecessors, (148), 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) [2022-12-14 15:01:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 97623 states and 105333 transitions. [2022-12-14 15:01:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-12-14 15:01:06,658 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:06,659 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:01:06,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:01:06,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 15:01:06,861 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash 100480571, now seen corresponding path program 1 times [2022-12-14 15:01:06,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:06,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140487652] [2022-12-14 15:01:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:06,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 363 proven. 73 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 15:01:07,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:07,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140487652] [2022-12-14 15:01:07,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140487652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:01:07,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574637980] [2022-12-14 15:01:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:07,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:07,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:07,420 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:01:07,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:01:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:01:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:01:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 436 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 15:01:07,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:01:07,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574637980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:01:07,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:01:07,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2022-12-14 15:01:07,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147928749] [2022-12-14 15:01:07,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:01:07,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:01:07,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:01:07,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:01:07,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:01:07,953 INFO L87 Difference]: Start difference. First operand 97623 states and 105333 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 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) [2022-12-14 15:01:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:01:09,053 INFO L93 Difference]: Finished difference Result 200158 states and 215633 transitions. [2022-12-14 15:01:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:01:09,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 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 440 [2022-12-14 15:01:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:01:09,153 INFO L225 Difference]: With dead ends: 200158 [2022-12-14 15:01:09,154 INFO L226 Difference]: Without dead ends: 103202 [2022-12-14 15:01:09,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:01:09,195 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 207 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:01:09,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 270 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:01:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103202 states. [2022-12-14 15:01:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103202 to 97337. [2022-12-14 15:01:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97337 states, 97336 states have (on average 1.0790252321854197) internal successors, (105028), 97336 states have internal predecessors, (105028), 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) [2022-12-14 15:01:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97337 states to 97337 states and 105028 transitions. [2022-12-14 15:01:10,388 INFO L78 Accepts]: Start accepts. Automaton has 97337 states and 105028 transitions. Word has length 440 [2022-12-14 15:01:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:01:10,389 INFO L495 AbstractCegarLoop]: Abstraction has 97337 states and 105028 transitions. [2022-12-14 15:01:10,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 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) [2022-12-14 15:01:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 97337 states and 105028 transitions. [2022-12-14 15:01:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-12-14 15:01:10,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:01:10,405 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:01:10,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:01:10,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:10,606 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:01:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:01:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash 523964349, now seen corresponding path program 1 times [2022-12-14 15:01:10,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:01:10,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961498149] [2022-12-14 15:01:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:10,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:01:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 323 proven. 193 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 15:01:11,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:01:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961498149] [2022-12-14 15:01:11,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961498149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:01:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132521079] [2022-12-14 15:01:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:01:11,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:01:11,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:01:11,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:01:11,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_904bafd2-eabc-49c4-8b19-848a4af23922/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:01:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:01:11,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:01:11,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:01:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 323 proven. 187 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:01:13,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:01:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 195 proven. 315 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:01:16,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132521079] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:01:16,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1418229016] [2022-12-14 15:01:16,104 INFO L159 IcfgInterpreter]: Started Sifa with 146 locations of interest [2022-12-14 15:01:16,104 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:01:16,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:01:16,105 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:01:16,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:01:30,036 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 15:01:30,083 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 15:01:30,931 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2022-12-14 15:01:30,966 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2022-12-14 15:04:10,022 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 15:04:10,085 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 22272 conjuctions. This might take some time... [2022-12-14 15:04:12,158 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 832 conjuctions. [2022-12-14 15:04:12,196 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2022-12-14 15:04:12,260 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 22272 conjuctions. This might take some time... [2022-12-14 15:04:14,342 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 832 conjuctions. [2022-12-14 15:04:21,150 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2022-12-14 15:04:21,257 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13296 conjuctions. This might take some time... [2022-12-14 15:04:21,676 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 320 conjuctions. [2022-12-14 15:04:21,697 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2022-12-14 15:04:21,804 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13296 conjuctions. This might take some time... [2022-12-14 15:04:22,222 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 320 conjuctions.