./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW --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 ecd70163e84c8e1a236d7543bf55ca7587f7becacb8c522f7caae4b1076f13b5 --- 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-4e7fbc6 [2022-11-23 16:00:05,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:00:05,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:00:05,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:00:05,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:00:05,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:00:05,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:00:05,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:00:05,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:00:05,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:00:05,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:00:05,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:00:05,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:00:05,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:00:05,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:00:05,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:00:05,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:00:05,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:00:05,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:00:05,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:00:05,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:00:05,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:00:05,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:00:05,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:00:05,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:00:05,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:00:05,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:00:05,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:00:05,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:00:05,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:00:05,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:00:05,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:00:05,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:00:05,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:00:05,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:00:05,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:00:05,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:00:05,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:00:05,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:00:05,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:00:05,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:00:05,795 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 16:00:05,835 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:00:05,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:00:05,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:00:05,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:00:05,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:00:05,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:00:05,838 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:00:05,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:00:05,839 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:00:05,839 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:00:05,840 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:00:05,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:00:05,841 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:00:05,841 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:00:05,841 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:00:05,841 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:00:05,842 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:00:05,842 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:00:05,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:00:05,843 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:00:05,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:00:05,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:00:05,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:00:05,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:00:05,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:00:05,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:00:05,845 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:00:05,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:00:05,845 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:00:05,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:00:05,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:00:05,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:00:05,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:00:05,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:00:05,848 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:00:05,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:00:05,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:00:05,848 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:00:05,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:00:05,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:00:05,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:00:05,849 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_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecd70163e84c8e1a236d7543bf55ca7587f7becacb8c522f7caae4b1076f13b5 [2022-11-23 16:00:06,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:00:06,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:00:06,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:00:06,154 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:00:06,154 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:00:06,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2022-11-23 16:00:09,538 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:00:09,799 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:00:09,800 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2022-11-23 16:00:09,818 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/data/7f6a0e0eb/4538c518a2704c55a3c0178104598a1a/FLAGaeb5bae23 [2022-11-23 16:00:09,834 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/data/7f6a0e0eb/4538c518a2704c55a3c0178104598a1a [2022-11-23 16:00:09,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:00:09,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:00:09,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:00:09,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:00:09,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:00:09,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:00:09" (1/1) ... [2022-11-23 16:00:09,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46bd0b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:09, skipping insertion in model container [2022-11-23 16:00:09,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:00:09" (1/1) ... [2022-11-23 16:00:09,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:00:09,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:00:10,077 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_57c6eee0-7c57-486a-b227-32153e38dab9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[914,927] [2022-11-23 16:00:10,142 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_57c6eee0-7c57-486a-b227-32153e38dab9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[7115,7128] [2022-11-23 16:00:10,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:00:10,312 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:00:10,333 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_57c6eee0-7c57-486a-b227-32153e38dab9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[914,927] [2022-11-23 16:00:10,368 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_57c6eee0-7c57-486a-b227-32153e38dab9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[7115,7128] [2022-11-23 16:00:10,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:00:10,516 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:00:10,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10 WrapperNode [2022-11-23 16:00:10,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:00:10,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:00:10,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:00:10,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:00:10,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,622 INFO L138 Inliner]: procedures = 75, calls = 91, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 987 [2022-11-23 16:00:10,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:00:10,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:00:10,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:00:10,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:00:10,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,750 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:00:10,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:00:10,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:00:10,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:00:10,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (1/1) ... [2022-11-23 16:00:10,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:00:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:00:10,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:00:10,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:00:10,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:00:10,873 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 16:00:10,873 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 16:00:10,873 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-23 16:00:10,873 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-23 16:00:10,873 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 16:00:10,874 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 16:00:10,874 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 16:00:10,874 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 16:00:10,874 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-23 16:00:10,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-23 16:00:10,875 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 16:00:10,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 16:00:10,875 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 16:00:10,875 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 16:00:10,875 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-23 16:00:10,876 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-23 16:00:10,876 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-23 16:00:10,876 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-23 16:00:10,876 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-23 16:00:10,877 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-23 16:00:10,878 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 16:00:10,878 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 16:00:10,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:00:10,879 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 16:00:10,879 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 16:00:10,880 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-23 16:00:10,882 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-23 16:00:10,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:00:10,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:00:10,882 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 16:00:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 16:00:10,883 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-23 16:00:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-23 16:00:11,101 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:00:11,103 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:00:12,169 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:00:12,783 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:00:12,783 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-11-23 16:00:12,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:00:12 BoogieIcfgContainer [2022-11-23 16:00:12,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:00:12,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:00:12,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:00:12,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:00:12,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:00:09" (1/3) ... [2022-11-23 16:00:12,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0bab7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:00:12, skipping insertion in model container [2022-11-23 16:00:12,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:10" (2/3) ... [2022-11-23 16:00:12,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0bab7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:00:12, skipping insertion in model container [2022-11-23 16:00:12,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:00:12" (3/3) ... [2022-11-23 16:00:12,805 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2022-11-23 16:00:12,826 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:00:12,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 16:00:12,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:00:12,913 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;@51c6b38e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:00:12,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 16:00:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 196 states have (on average 1.5459183673469388) internal successors, (303), 204 states have internal predecessors, (303), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-23 16:00:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 16:00:12,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:12,937 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] [2022-11-23 16:00:12,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:12,944 INFO L85 PathProgramCache]: Analyzing trace with hash 58588846, now seen corresponding path program 1 times [2022-11-23 16:00:12,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:12,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075120038] [2022-11-23 16:00:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:13,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:13,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075120038] [2022-11-23 16:00:13,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075120038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:13,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:13,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:00:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771213282] [2022-11-23 16:00:13,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:13,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:00:13,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:00:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:00:13,423 INFO L87 Difference]: Start difference. First operand has 255 states, 196 states have (on average 1.5459183673469388) internal successors, (303), 204 states have internal predecessors, (303), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 16:00:13,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:13,970 INFO L93 Difference]: Finished difference Result 560 states and 841 transitions. [2022-11-23 16:00:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:00:13,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-23 16:00:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:13,984 INFO L225 Difference]: With dead ends: 560 [2022-11-23 16:00:13,984 INFO L226 Difference]: Without dead ends: 309 [2022-11-23 16:00:13,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:00:13,992 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 431 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:13,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 632 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 16:00:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-23 16:00:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 302. [2022-11-23 16:00:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 231 states have (on average 1.4545454545454546) internal successors, (336), 236 states have internal predecessors, (336), 49 states have call successors, (49), 22 states have call predecessors, (49), 20 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-23 16:00:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 430 transitions. [2022-11-23 16:00:14,104 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 430 transitions. Word has length 45 [2022-11-23 16:00:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:14,104 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 430 transitions. [2022-11-23 16:00:14,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 16:00:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 430 transitions. [2022-11-23 16:00:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 16:00:14,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:14,109 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] [2022-11-23 16:00:14,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:00:14,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:14,112 INFO L85 PathProgramCache]: Analyzing trace with hash 977563469, now seen corresponding path program 1 times [2022-11-23 16:00:14,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:14,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131279723] [2022-11-23 16:00:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:14,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:14,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:14,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131279723] [2022-11-23 16:00:14,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131279723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:14,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:14,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:00:14,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970438166] [2022-11-23 16:00:14,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:14,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:00:14,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:00:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:00:14,392 INFO L87 Difference]: Start difference. First operand 302 states and 430 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 16:00:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:15,385 INFO L93 Difference]: Finished difference Result 704 states and 933 transitions. [2022-11-23 16:00:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:00:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-23 16:00:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:15,391 INFO L225 Difference]: With dead ends: 704 [2022-11-23 16:00:15,391 INFO L226 Difference]: Without dead ends: 572 [2022-11-23 16:00:15,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:00:15,393 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 888 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:15,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 1124 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 16:00:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-11-23 16:00:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 488. [2022-11-23 16:00:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 363 states have (on average 1.3663911845730028) internal successors, (496), 369 states have internal predecessors, (496), 76 states have call successors, (76), 45 states have call predecessors, (76), 47 states have return successors, (76), 75 states have call predecessors, (76), 72 states have call successors, (76) [2022-11-23 16:00:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 648 transitions. [2022-11-23 16:00:15,450 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 648 transitions. Word has length 45 [2022-11-23 16:00:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:15,450 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 648 transitions. [2022-11-23 16:00:15,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 16:00:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 648 transitions. [2022-11-23 16:00:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 16:00:15,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:15,453 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] [2022-11-23 16:00:15,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:00:15,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1338578503, now seen corresponding path program 1 times [2022-11-23 16:00:15,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:15,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712077544] [2022-11-23 16:00:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:15,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:15,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:15,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712077544] [2022-11-23 16:00:15,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712077544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:15,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:15,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 16:00:15,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2413535] [2022-11-23 16:00:15,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:15,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 16:00:15,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 16:00:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:00:15,724 INFO L87 Difference]: Start difference. First operand 488 states and 648 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:00:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:16,820 INFO L93 Difference]: Finished difference Result 1004 states and 1264 transitions. [2022-11-23 16:00:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 16:00:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-23 16:00:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:16,825 INFO L225 Difference]: With dead ends: 1004 [2022-11-23 16:00:16,825 INFO L226 Difference]: Without dead ends: 702 [2022-11-23 16:00:16,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 16:00:16,828 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 520 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:16,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1092 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 16:00:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-23 16:00:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 667. [2022-11-23 16:00:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 488 states have (on average 1.3278688524590163) internal successors, (648), 495 states have internal predecessors, (648), 103 states have call successors, (103), 68 states have call predecessors, (103), 74 states have return successors, (107), 105 states have call predecessors, (107), 99 states have call successors, (107) [2022-11-23 16:00:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 858 transitions. [2022-11-23 16:00:16,930 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 858 transitions. Word has length 46 [2022-11-23 16:00:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:16,931 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 858 transitions. [2022-11-23 16:00:16,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:00:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 858 transitions. [2022-11-23 16:00:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 16:00:16,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:16,940 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] [2022-11-23 16:00:16,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:00:16,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash -771161650, now seen corresponding path program 1 times [2022-11-23 16:00:16,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:16,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447900757] [2022-11-23 16:00:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:16,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:17,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:17,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447900757] [2022-11-23 16:00:17,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447900757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:17,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:17,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:00:17,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208896222] [2022-11-23 16:00:17,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:17,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:00:17,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:00:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:17,049 INFO L87 Difference]: Start difference. First operand 667 states and 858 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:00:17,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:17,258 INFO L93 Difference]: Finished difference Result 1231 states and 1528 transitions. [2022-11-23 16:00:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:00:17,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-23 16:00:17,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:17,264 INFO L225 Difference]: With dead ends: 1231 [2022-11-23 16:00:17,264 INFO L226 Difference]: Without dead ends: 799 [2022-11-23 16:00:17,265 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 [2022-11-23 16:00:17,267 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 67 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:17,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 604 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:00:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-11-23 16:00:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 694. [2022-11-23 16:00:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 511 states have (on average 1.3170254403131116) internal successors, (673), 518 states have internal predecessors, (673), 105 states have call successors, (105), 70 states have call predecessors, (105), 76 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2022-11-23 16:00:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 887 transitions. [2022-11-23 16:00:17,345 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 887 transitions. Word has length 47 [2022-11-23 16:00:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:17,346 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 887 transitions. [2022-11-23 16:00:17,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:00:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 887 transitions. [2022-11-23 16:00:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 16:00:17,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:17,348 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 16:00:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:00:17,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1907084848, now seen corresponding path program 1 times [2022-11-23 16:00:17,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:17,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410603901] [2022-11-23 16:00:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:17,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:00:17,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410603901] [2022-11-23 16:00:17,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410603901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:17,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:17,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:00:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275769208] [2022-11-23 16:00:17,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:17,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:00:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:00:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:17,416 INFO L87 Difference]: Start difference. First operand 694 states and 887 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:00:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:17,599 INFO L93 Difference]: Finished difference Result 884 states and 1108 transitions. [2022-11-23 16:00:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:00:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-23 16:00:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:17,604 INFO L225 Difference]: With dead ends: 884 [2022-11-23 16:00:17,604 INFO L226 Difference]: Without dead ends: 611 [2022-11-23 16:00:17,605 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 [2022-11-23 16:00:17,609 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 336 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:17,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 380 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:00:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-23 16:00:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 502. [2022-11-23 16:00:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 371 states have (on average 1.3234501347708896) internal successors, (491), 376 states have internal predecessors, (491), 81 states have call successors, (81), 50 states have call predecessors, (81), 48 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2022-11-23 16:00:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 649 transitions. [2022-11-23 16:00:17,684 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 649 transitions. Word has length 53 [2022-11-23 16:00:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:17,686 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 649 transitions. [2022-11-23 16:00:17,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:00:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 649 transitions. [2022-11-23 16:00:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 16:00:17,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:17,689 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 16:00:17,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:00:17,690 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:17,691 INFO L85 PathProgramCache]: Analyzing trace with hash -549814299, now seen corresponding path program 1 times [2022-11-23 16:00:17,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:17,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783529515] [2022-11-23 16:00:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:17,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:17,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:17,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783529515] [2022-11-23 16:00:17,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783529515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:17,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:17,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:00:17,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377841116] [2022-11-23 16:00:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:00:17,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:00:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:00:17,848 INFO L87 Difference]: Start difference. First operand 502 states and 649 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 16:00:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:18,213 INFO L93 Difference]: Finished difference Result 605 states and 765 transitions. [2022-11-23 16:00:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:00:18,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-23 16:00:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:18,217 INFO L225 Difference]: With dead ends: 605 [2022-11-23 16:00:18,217 INFO L226 Difference]: Without dead ends: 602 [2022-11-23 16:00:18,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:00:18,218 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 609 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:18,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 356 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:00:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-11-23 16:00:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 501. [2022-11-23 16:00:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 371 states have (on average 1.3153638814016173) internal successors, (488), 375 states have internal predecessors, (488), 80 states have call successors, (80), 50 states have call predecessors, (80), 48 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2022-11-23 16:00:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 645 transitions. [2022-11-23 16:00:18,326 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 645 transitions. Word has length 54 [2022-11-23 16:00:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:18,327 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 645 transitions. [2022-11-23 16:00:18,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 16:00:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 645 transitions. [2022-11-23 16:00:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 16:00:18,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:18,329 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 16:00:18,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:00:18,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:18,330 INFO L85 PathProgramCache]: Analyzing trace with hash 134237751, now seen corresponding path program 1 times [2022-11-23 16:00:18,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:18,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124137895] [2022-11-23 16:00:18,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:18,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:18,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:18,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124137895] [2022-11-23 16:00:18,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124137895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:00:18,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033812053] [2022-11-23 16:00:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:18,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:00:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:00:18,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:00:18,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:00:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 16:00:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:00:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:19,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:00:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:19,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033812053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:00:19,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515310584] [2022-11-23 16:00:19,253 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 16:00:19,254 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:00:19,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:00:19,263 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:00:19,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:00:26,704 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 195 for LOIs [2022-11-23 16:00:26,754 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-11-23 16:00:26,780 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 191 for LOIs [2022-11-23 16:00:26,819 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 199 for LOIs [2022-11-23 16:00:27,855 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 195 for LOIs [2022-11-23 16:00:27,979 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 195 for LOIs [2022-11-23 16:00:28,099 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 195 for LOIs [2022-11-23 16:00:28,145 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 202 for LOIs [2022-11-23 16:00:28,207 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:00:59,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12498#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~t11_i~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 16:00:59,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:00:59,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:00:59,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 16:00:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75386523] [2022-11-23 16:00:59,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:00:59,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:00:59,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:00:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 16:00:59,587 INFO L87 Difference]: Start difference. First operand 501 states and 645 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 16:01:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:00,396 INFO L93 Difference]: Finished difference Result 1074 states and 1300 transitions. [2022-11-23 16:01:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:01:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-23 16:01:00,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:00,402 INFO L225 Difference]: With dead ends: 1074 [2022-11-23 16:01:00,402 INFO L226 Difference]: Without dead ends: 1071 [2022-11-23 16:01:00,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 16:01:00,405 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 834 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:00,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1293 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 16:01:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-11-23 16:01:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 796. [2022-11-23 16:01:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 576 states have (on average 1.2690972222222223) internal successors, (731), 580 states have internal predecessors, (731), 128 states have call successors, (128), 92 states have call predecessors, (128), 90 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-11-23 16:01:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 984 transitions. [2022-11-23 16:01:00,516 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 984 transitions. Word has length 55 [2022-11-23 16:01:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:00,517 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 984 transitions. [2022-11-23 16:01:00,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 16:01:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 984 transitions. [2022-11-23 16:01:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 16:01:00,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:00,519 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 16:01:00,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:00,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 16:01:00,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1114456347, now seen corresponding path program 2 times [2022-11-23 16:01:00,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:00,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560089571] [2022-11-23 16:01:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:00,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:00,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560089571] [2022-11-23 16:01:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560089571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:00,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:00,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:00,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050696253] [2022-11-23 16:01:00,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:00,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:00,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:00,774 INFO L87 Difference]: Start difference. First operand 796 states and 984 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 16:01:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:00,987 INFO L93 Difference]: Finished difference Result 1209 states and 1457 transitions. [2022-11-23 16:01:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-23 16:01:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:00,995 INFO L225 Difference]: With dead ends: 1209 [2022-11-23 16:01:00,995 INFO L226 Difference]: Without dead ends: 798 [2022-11-23 16:01:01,001 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 [2022-11-23 16:01:01,003 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 339 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:01,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 413 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:01:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-23 16:01:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 792. [2022-11-23 16:01:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 572 states have (on average 1.256993006993007) internal successors, (719), 576 states have internal predecessors, (719), 128 states have call successors, (128), 92 states have call predecessors, (128), 90 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-11-23 16:01:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 972 transitions. [2022-11-23 16:01:01,109 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 972 transitions. Word has length 58 [2022-11-23 16:01:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:01,110 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 972 transitions. [2022-11-23 16:01:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 16:01:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 972 transitions. [2022-11-23 16:01:01,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 16:01:01,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:01,112 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 16:01:01,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 16:01:01,112 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:01,113 INFO L85 PathProgramCache]: Analyzing trace with hash 365175705, now seen corresponding path program 1 times [2022-11-23 16:01:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:01,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596074321] [2022-11-23 16:01:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:01,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:01:01,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596074321] [2022-11-23 16:01:01,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596074321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:01,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:01,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:01,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666968935] [2022-11-23 16:01:01,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:01,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:01,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:01,166 INFO L87 Difference]: Start difference. First operand 792 states and 972 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 16:01:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:01,392 INFO L93 Difference]: Finished difference Result 1411 states and 1682 transitions. [2022-11-23 16:01:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:01,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-23 16:01:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:01,398 INFO L225 Difference]: With dead ends: 1411 [2022-11-23 16:01:01,398 INFO L226 Difference]: Without dead ends: 1048 [2022-11-23 16:01:01,399 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 [2022-11-23 16:01:01,402 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 42 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:01,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 640 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:01:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-11-23 16:01:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 867. [2022-11-23 16:01:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 633 states have (on average 1.25434439178515) internal successors, (794), 637 states have internal predecessors, (794), 135 states have call successors, (135), 99 states have call predecessors, (135), 97 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-23 16:01:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1061 transitions. [2022-11-23 16:01:01,511 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1061 transitions. Word has length 61 [2022-11-23 16:01:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:01,511 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1061 transitions. [2022-11-23 16:01:01,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 16:01:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1061 transitions. [2022-11-23 16:01:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 16:01:01,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:01,513 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] [2022-11-23 16:01:01,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 16:01:01,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:01,514 INFO L85 PathProgramCache]: Analyzing trace with hash -990845396, now seen corresponding path program 1 times [2022-11-23 16:01:01,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:01,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531274444] [2022-11-23 16:01:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:01,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:01,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:01,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531274444] [2022-11-23 16:01:01,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531274444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:01,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:01,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:01:01,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957883391] [2022-11-23 16:01:01,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:01,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:01:01,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:01,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:01:01,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:01:01,652 INFO L87 Difference]: Start difference. First operand 867 states and 1061 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 16:01:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:02,766 INFO L93 Difference]: Finished difference Result 1700 states and 2439 transitions. [2022-11-23 16:01:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:01:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2022-11-23 16:01:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:02,775 INFO L225 Difference]: With dead ends: 1700 [2022-11-23 16:01:02,775 INFO L226 Difference]: Without dead ends: 1525 [2022-11-23 16:01:02,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:01:02,778 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 1365 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:02,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1381 Valid, 1397 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 16:01:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-11-23 16:01:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1512. [2022-11-23 16:01:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1173 states have (on average 1.3793691389599319) internal successors, (1618), 1180 states have internal predecessors, (1618), 216 states have call successors, (216), 123 states have call predecessors, (216), 121 states have return successors, (271), 210 states have call predecessors, (271), 213 states have call successors, (271) [2022-11-23 16:01:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2105 transitions. [2022-11-23 16:01:02,972 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2105 transitions. Word has length 65 [2022-11-23 16:01:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:02,972 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2105 transitions. [2022-11-23 16:01:02,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 16:01:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2105 transitions. [2022-11-23 16:01:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 16:01:02,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:02,975 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 16:01:02,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 16:01:02,975 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:02,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1936092051, now seen corresponding path program 1 times [2022-11-23 16:01:02,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:02,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636672704] [2022-11-23 16:01:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:02,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:01:03,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:03,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636672704] [2022-11-23 16:01:03,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636672704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:03,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:03,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 16:01:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856976695] [2022-11-23 16:01:03,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:03,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 16:01:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 16:01:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:01:03,151 INFO L87 Difference]: Start difference. First operand 1512 states and 2105 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 16:01:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:04,253 INFO L93 Difference]: Finished difference Result 2561 states and 3288 transitions. [2022-11-23 16:01:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 16:01:04,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-23 16:01:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:04,266 INFO L225 Difference]: With dead ends: 2561 [2022-11-23 16:01:04,266 INFO L226 Difference]: Without dead ends: 1880 [2022-11-23 16:01:04,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 16:01:04,270 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 502 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:04,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 925 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:01:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2022-11-23 16:01:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1831. [2022-11-23 16:01:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1387 states have (on average 1.3366979091564528) internal successors, (1854), 1394 states have internal predecessors, (1854), 272 states have call successors, (272), 172 states have call predecessors, (272), 170 states have return successors, (327), 266 states have call predecessors, (327), 269 states have call successors, (327) [2022-11-23 16:01:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2453 transitions. [2022-11-23 16:01:04,508 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2453 transitions. Word has length 70 [2022-11-23 16:01:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:04,509 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 2453 transitions. [2022-11-23 16:01:04,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 16:01:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2453 transitions. [2022-11-23 16:01:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 16:01:04,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:04,511 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 16:01:04,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 16:01:04,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash 75583325, now seen corresponding path program 1 times [2022-11-23 16:01:04,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:04,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064698469] [2022-11-23 16:01:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:04,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:01:04,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064698469] [2022-11-23 16:01:04,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064698469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:04,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:04,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:04,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723436420] [2022-11-23 16:01:04,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:04,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:04,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:04,606 INFO L87 Difference]: Start difference. First operand 1831 states and 2453 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 16:01:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:05,000 INFO L93 Difference]: Finished difference Result 2797 states and 3547 transitions. [2022-11-23 16:01:05,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:05,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-23 16:01:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:05,011 INFO L225 Difference]: With dead ends: 2797 [2022-11-23 16:01:05,011 INFO L226 Difference]: Without dead ends: 2007 [2022-11-23 16:01:05,014 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 [2022-11-23 16:01:05,015 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 37 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:05,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 634 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:01:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2022-11-23 16:01:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1878. [2022-11-23 16:01:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1426 states have (on average 1.332398316970547) internal successors, (1900), 1433 states have internal predecessors, (1900), 276 states have call successors, (276), 176 states have call predecessors, (276), 174 states have return successors, (331), 270 states have call predecessors, (331), 273 states have call successors, (331) [2022-11-23 16:01:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2507 transitions. [2022-11-23 16:01:05,312 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2507 transitions. Word has length 71 [2022-11-23 16:01:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:05,312 INFO L495 AbstractCegarLoop]: Abstraction has 1878 states and 2507 transitions. [2022-11-23 16:01:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 16:01:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2507 transitions. [2022-11-23 16:01:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 16:01:05,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:05,316 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:05,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 16:01:05,317 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1443046220, now seen corresponding path program 1 times [2022-11-23 16:01:05,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:05,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266329358] [2022-11-23 16:01:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 16:01:05,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:05,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266329358] [2022-11-23 16:01:05,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266329358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:05,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318938878] [2022-11-23 16:01:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:05,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:05,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:05,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:05,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:01:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:01:05,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:01:06,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:01:06,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318938878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:06,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:01:06,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-23 16:01:06,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452735252] [2022-11-23 16:01:06,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:06,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:01:06,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:01:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:01:06,019 INFO L87 Difference]: Start difference. First operand 1878 states and 2507 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 16:01:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:06,591 INFO L93 Difference]: Finished difference Result 2742 states and 3512 transitions. [2022-11-23 16:01:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 16:01:06,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 16:01:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:06,605 INFO L225 Difference]: With dead ends: 2742 [2022-11-23 16:01:06,605 INFO L226 Difference]: Without dead ends: 1695 [2022-11-23 16:01:06,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:01:06,610 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 334 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:06,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1386 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:01:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-11-23 16:01:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1510. [2022-11-23 16:01:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1189 states have (on average 1.3708999158957107) internal successors, (1630), 1196 states have internal predecessors, (1630), 205 states have call successors, (205), 116 states have call predecessors, (205), 114 states have return successors, (260), 199 states have call predecessors, (260), 202 states have call successors, (260) [2022-11-23 16:01:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 2095 transitions. [2022-11-23 16:01:06,852 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 2095 transitions. Word has length 102 [2022-11-23 16:01:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:06,852 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 2095 transitions. [2022-11-23 16:01:06,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 16:01:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 2095 transitions. [2022-11-23 16:01:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 16:01:06,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:06,856 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:06,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:07,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:07,074 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash 657023516, now seen corresponding path program 1 times [2022-11-23 16:01:07,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:07,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848739748] [2022-11-23 16:01:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:07,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 16:01:07,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:07,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848739748] [2022-11-23 16:01:07,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848739748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:07,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657729955] [2022-11-23 16:01:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:07,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:07,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:07,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:07,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:01:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 16:01:07,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:01:07,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:01:07,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657729955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:07,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:01:07,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 16:01:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081397528] [2022-11-23 16:01:07,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:07,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:01:07,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:01:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:01:07,618 INFO L87 Difference]: Start difference. First operand 1510 states and 2095 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 16:01:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:08,170 INFO L93 Difference]: Finished difference Result 2059 states and 2720 transitions. [2022-11-23 16:01:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:01:08,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-23 16:01:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:08,179 INFO L225 Difference]: With dead ends: 2059 [2022-11-23 16:01:08,179 INFO L226 Difference]: Without dead ends: 1466 [2022-11-23 16:01:08,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:01:08,182 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 67 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:08,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1647 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:01:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-11-23 16:01:08,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1374. [2022-11-23 16:01:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1089 states have (on average 1.3893480257116622) internal successors, (1513), 1096 states have internal predecessors, (1513), 186 states have call successors, (186), 99 states have call predecessors, (186), 97 states have return successors, (241), 180 states have call predecessors, (241), 183 states have call successors, (241) [2022-11-23 16:01:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 1940 transitions. [2022-11-23 16:01:08,403 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 1940 transitions. Word has length 112 [2022-11-23 16:01:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:08,404 INFO L495 AbstractCegarLoop]: Abstraction has 1374 states and 1940 transitions. [2022-11-23 16:01:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 16:01:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 1940 transitions. [2022-11-23 16:01:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 16:01:08,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:08,410 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:08,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:08,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 16:01:08,617 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1218796345, now seen corresponding path program 1 times [2022-11-23 16:01:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:08,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685873595] [2022-11-23 16:01:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 16:01:08,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:08,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685873595] [2022-11-23 16:01:08,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685873595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:08,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535020652] [2022-11-23 16:01:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:08,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:08,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:08,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:08,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:01:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:08,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 16:01:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 16:01:09,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:01:09,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535020652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:09,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:01:09,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-23 16:01:09,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786895336] [2022-11-23 16:01:09,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:09,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:01:09,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:01:09,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:01:09,051 INFO L87 Difference]: Start difference. First operand 1374 states and 1940 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 16:01:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:09,509 INFO L93 Difference]: Finished difference Result 2123 states and 2785 transitions. [2022-11-23 16:01:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:01:09,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-23 16:01:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:09,519 INFO L225 Difference]: With dead ends: 2123 [2022-11-23 16:01:09,519 INFO L226 Difference]: Without dead ends: 1666 [2022-11-23 16:01:09,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 16:01:09,522 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 319 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:09,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1402 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:01:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-11-23 16:01:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1632. [2022-11-23 16:01:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1251 states have (on average 1.3533173461231016) internal successors, (1693), 1264 states have internal predecessors, (1693), 234 states have call successors, (234), 141 states have call predecessors, (234), 145 states have return successors, (301), 228 states have call predecessors, (301), 231 states have call successors, (301) [2022-11-23 16:01:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2228 transitions. [2022-11-23 16:01:09,793 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2228 transitions. Word has length 113 [2022-11-23 16:01:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:09,793 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 2228 transitions. [2022-11-23 16:01:09,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 16:01:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2228 transitions. [2022-11-23 16:01:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 16:01:09,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:09,797 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:09,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:10,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 16:01:10,004 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1780700868, now seen corresponding path program 1 times [2022-11-23 16:01:10,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:10,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118124757] [2022-11-23 16:01:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:10,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 16:01:11,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:11,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118124757] [2022-11-23 16:01:11,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118124757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:11,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488192821] [2022-11-23 16:01:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:11,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:11,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:11,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:01:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 16:01:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:01:12,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:01:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 16:01:14,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488192821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:01:14,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717470135] [2022-11-23 16:01:14,608 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-23 16:01:14,608 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:01:14,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:01:14,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:01:14,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:02:39,089 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 353 for LOIs [2022-11-23 16:02:40,347 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 304 for LOIs [2022-11-23 16:02:40,470 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 295 for LOIs [2022-11-23 16:02:40,606 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 365 for LOIs [2022-11-23 16:02:44,363 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 203 for LOIs [2022-11-23 16:02:44,825 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 149 for LOIs [2022-11-23 16:02:45,312 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 357 for LOIs [2022-11-23 16:02:46,380 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 380 for LOIs [2022-11-23 16:02:47,261 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:03:32,136 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 329 DAG size of output: 255 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:47,983 WARN L233 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 327 DAG size of output: 252 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:25,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57432#(and (<= 0 ~t9_i~0) (<= 1 ~p_dw_i~0) (<= 1 ~q_free~0) (<= ~t7_i~0 0) (<= 0 ~t4_i~0) (<= 2 ~E_1~0) (<= 2 ~T2_E~0) (<= 0 ~t5_pc~0) (<= 0 ~t6_i~0) (<= ~t5_st~0 0) (<= 2 ~T6_E~0) (<= 0 |#NULL.base|) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= ~t9_i~0 0) (<= 0 ~t3_i~0) (<= 0 ~t5_st~0) (<= ~p_dw_pc~0 1) (<= ~T6_E~0 2) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= ~t4_i~0 0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (<= 1 ~q_req_up~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (<= |#NULL.offset| 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= ~p_dw_i~0 1) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~q_free~0 1) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= 0 ~t7_i~0) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= ~T2_E~0 2) (<= 2 ~E_4~0) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= ~t5_pc~0 0) (<= 2 ~E_5~0) (<= ~t6_i~0 0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~E_1~0 2) (<= 0 |#NULL.offset|) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0))' at error location [2022-11-23 16:04:25,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:04:25,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:04:25,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-23 16:04:25,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566287300] [2022-11-23 16:04:25,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:04:25,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 16:04:25,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:04:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 16:04:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=9967, Unknown=0, NotChecked=0, Total=10712 [2022-11-23 16:04:25,954 INFO L87 Difference]: Start difference. First operand 1632 states and 2228 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 16:04:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:50,173 INFO L93 Difference]: Finished difference Result 3922 states and 4882 transitions. [2022-11-23 16:04:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-23 16:04:50,175 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-23 16:04:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:50,189 INFO L225 Difference]: With dead ends: 3922 [2022-11-23 16:04:50,189 INFO L226 Difference]: Without dead ends: 3207 [2022-11-23 16:04:50,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 287 SyntacticMatches, 8 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40686 ImplicationChecksByTransitivity, 117.3s TimeCoverageRelationStatistics Valid=9141, Invalid=89141, Unknown=0, NotChecked=0, Total=98282 [2022-11-23 16:04:50,211 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 5937 mSDsluCounter, 3249 mSDsCounter, 0 mSdLazyCounter, 7169 mSolverCounterSat, 2774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5941 SdHoareTripleChecker+Valid, 3506 SdHoareTripleChecker+Invalid, 9943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2774 IncrementalHoareTripleChecker+Valid, 7169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:50,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5941 Valid, 3506 Invalid, 9943 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2774 Valid, 7169 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-23 16:04:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-11-23 16:04:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 1908. [2022-11-23 16:04:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1435 states have (on average 1.326829268292683) internal successors, (1904), 1450 states have internal predecessors, (1904), 279 states have call successors, (279), 178 states have call predecessors, (279), 192 states have return successors, (358), 281 states have call predecessors, (358), 276 states have call successors, (358) [2022-11-23 16:04:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2541 transitions. [2022-11-23 16:04:50,673 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2541 transitions. Word has length 114 [2022-11-23 16:04:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:50,674 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2541 transitions. [2022-11-23 16:04:50,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 16:04:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2541 transitions. [2022-11-23 16:04:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 16:04:50,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:50,677 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:04:50,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:04:50,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:04:50,885 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1276584700, now seen corresponding path program 1 times [2022-11-23 16:04:50,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:50,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100959746] [2022-11-23 16:04:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:50,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:04:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 16:04:51,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:04:51,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100959746] [2022-11-23 16:04:51,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100959746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:04:51,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501000978] [2022-11-23 16:04:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:51,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:04:51,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:04:51,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:04:51,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 16:04:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 16:04:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:04:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 16:04:51,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:04:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 16:04:51,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501000978] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:04:51,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:04:51,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-23 16:04:51,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591586546] [2022-11-23 16:04:51,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:04:51,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:04:51,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:04:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:04:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:04:51,855 INFO L87 Difference]: Start difference. First operand 1908 states and 2541 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 16:04:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:53,164 INFO L93 Difference]: Finished difference Result 3232 states and 4089 transitions. [2022-11-23 16:04:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 16:04:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-23 16:04:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:53,174 INFO L225 Difference]: With dead ends: 3232 [2022-11-23 16:04:53,174 INFO L226 Difference]: Without dead ends: 2241 [2022-11-23 16:04:53,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-23 16:04:53,178 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 494 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:53,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 889 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 16:04:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2022-11-23 16:04:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1988. [2022-11-23 16:04:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1480 states have (on average 1.320945945945946) internal successors, (1955), 1498 states have internal predecessors, (1955), 298 states have call successors, (298), 187 states have call predecessors, (298), 208 states have return successors, (398), 304 states have call predecessors, (398), 295 states have call successors, (398) [2022-11-23 16:04:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2651 transitions. [2022-11-23 16:04:53,601 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2651 transitions. Word has length 115 [2022-11-23 16:04:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:53,602 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 2651 transitions. [2022-11-23 16:04:53,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 16:04:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2651 transitions. [2022-11-23 16:04:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 16:04:53,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:53,606 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:04:53,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:04:53,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 16:04:53,813 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2025099160, now seen corresponding path program 1 times [2022-11-23 16:04:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:53,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052068661] [2022-11-23 16:04:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:53,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:04:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 16:04:54,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:04:54,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052068661] [2022-11-23 16:04:54,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052068661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:04:54,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547608780] [2022-11-23 16:04:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:54,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:04:54,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:04:54,713 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:04:54,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 16:04:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:54,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 16:04:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:04:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:04:55,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:04:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 16:04:57,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547608780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:04:57,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700400392] [2022-11-23 16:04:57,835 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-23 16:04:57,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:04:57,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:04:57,836 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:04:57,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:05:23,574 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 352 for LOIs [2022-11-23 16:05:24,646 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 302 for LOIs [2022-11-23 16:05:24,767 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 299 for LOIs [2022-11-23 16:05:24,934 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 364 for LOIs [2022-11-23 16:05:28,849 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 202 for LOIs [2022-11-23 16:05:29,328 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 150 for LOIs [2022-11-23 16:05:29,780 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 356 for LOIs [2022-11-23 16:05:30,861 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 379 for LOIs [2022-11-23 16:05:32,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:06:09,123 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 307 DAG size of output: 233 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:06:15,312 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 309 DAG size of output: 235 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:16,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75460#(and (= ~q_req_up~0 1) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (<= ~t7_pc~0 0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (<= |#NULL.offset| 0) (<= 0 ~t9_st~0) (= ~c_dr_pc~0 1) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~T8_E~0) (<= 2 ~E_9~0) (<= 2 ~E_6~0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 0 ~t10_pc~0) (or (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= 0 ~t8_pc~0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= 2 ~p_dw_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= 0 ~t8_pc~0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t11_pc~0 0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))) (<= 2 ~E_4~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 2 ~T9_E~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= ~t11_i~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0))' at error location [2022-11-23 16:07:16,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:07:16,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:07:16,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-23 16:07:16,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029131582] [2022-11-23 16:07:16,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:07:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 16:07:16,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 16:07:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=10254, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 16:07:16,789 INFO L87 Difference]: Start difference. First operand 1988 states and 2651 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 16:07:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:28,935 INFO L93 Difference]: Finished difference Result 4837 states and 5993 transitions. [2022-11-23 16:07:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-23 16:07:28,936 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-23 16:07:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:28,953 INFO L225 Difference]: With dead ends: 4837 [2022-11-23 16:07:28,953 INFO L226 Difference]: Without dead ends: 3766 [2022-11-23 16:07:28,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 309 SyntacticMatches, 7 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14903 ImplicationChecksByTransitivity, 111.5s TimeCoverageRelationStatistics Valid=3644, Invalid=31888, Unknown=0, NotChecked=0, Total=35532 [2022-11-23 16:07:28,962 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 6413 mSDsluCounter, 2943 mSDsCounter, 0 mSdLazyCounter, 6286 mSolverCounterSat, 3258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6414 SdHoareTripleChecker+Valid, 3175 SdHoareTripleChecker+Invalid, 9544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3258 IncrementalHoareTripleChecker+Valid, 6286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:28,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6414 Valid, 3175 Invalid, 9544 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3258 Valid, 6286 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-23 16:07:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2022-11-23 16:07:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 2525. [2022-11-23 16:07:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2525 states, 1866 states have (on average 1.2883172561629153) internal successors, (2404), 1884 states have internal predecessors, (2404), 372 states have call successors, (372), 246 states have call predecessors, (372), 285 states have return successors, (490), 396 states have call predecessors, (490), 369 states have call successors, (490) [2022-11-23 16:07:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2525 states to 2525 states and 3266 transitions. [2022-11-23 16:07:29,594 INFO L78 Accepts]: Start accepts. Automaton has 2525 states and 3266 transitions. Word has length 124 [2022-11-23 16:07:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:29,595 INFO L495 AbstractCegarLoop]: Abstraction has 2525 states and 3266 transitions. [2022-11-23 16:07:29,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 16:07:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2525 states and 3266 transitions. [2022-11-23 16:07:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 16:07:29,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:29,601 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:29,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:29,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 16:07:29,806 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:29,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1822746402, now seen corresponding path program 1 times [2022-11-23 16:07:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:29,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899007706] [2022-11-23 16:07:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:29,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 16:07:30,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899007706] [2022-11-23 16:07:30,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899007706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9559462] [2022-11-23 16:07:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:30,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:30,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:30,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:30,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 16:07:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:30,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 16:07:30,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 16:07:30,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:07:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 16:07:30,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9559462] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:30,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:07:30,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-23 16:07:30,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309325619] [2022-11-23 16:07:30,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:30,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 16:07:30,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:30,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 16:07:30,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:07:30,644 INFO L87 Difference]: Start difference. First operand 2525 states and 3266 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 16:07:32,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:32,207 INFO L93 Difference]: Finished difference Result 3484 states and 4357 transitions. [2022-11-23 16:07:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 16:07:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-23 16:07:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:32,216 INFO L225 Difference]: With dead ends: 3484 [2022-11-23 16:07:32,216 INFO L226 Difference]: Without dead ends: 1876 [2022-11-23 16:07:32,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 16:07:32,219 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 733 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:32,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 850 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 16:07:32,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2022-11-23 16:07:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1535. [2022-11-23 16:07:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1169 states have (on average 1.3532934131736527) internal successors, (1582), 1186 states have internal predecessors, (1582), 222 states have call successors, (222), 125 states have call predecessors, (222), 142 states have return successors, (307), 225 states have call predecessors, (307), 219 states have call successors, (307) [2022-11-23 16:07:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2111 transitions. [2022-11-23 16:07:32,548 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2111 transitions. Word has length 125 [2022-11-23 16:07:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:32,549 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 2111 transitions. [2022-11-23 16:07:32,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 16:07:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2111 transitions. [2022-11-23 16:07:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:07:32,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:32,554 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, 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] [2022-11-23 16:07:32,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:32,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:32,761 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:32,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:32,762 INFO L85 PathProgramCache]: Analyzing trace with hash -754662820, now seen corresponding path program 1 times [2022-11-23 16:07:32,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:32,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508977629] [2022-11-23 16:07:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:32,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:07:32,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508977629] [2022-11-23 16:07:32,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508977629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39894278] [2022-11-23 16:07:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:32,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:32,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:32,929 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:32,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 16:07:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:33,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:07:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 16:07:33,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:33,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39894278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:33,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:07:33,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:07:33,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269268694] [2022-11-23 16:07:33,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:33,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:33,258 INFO L87 Difference]: Start difference. First operand 1535 states and 2111 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:33,954 INFO L93 Difference]: Finished difference Result 3159 states and 4826 transitions. [2022-11-23 16:07:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:33,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:07:33,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:33,984 INFO L225 Difference]: With dead ends: 3159 [2022-11-23 16:07:33,985 INFO L226 Difference]: Without dead ends: 2339 [2022-11-23 16:07:33,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:33,991 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 335 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:33,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 538 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2022-11-23 16:07:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2330. [2022-11-23 16:07:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 1837 states have (on average 1.4137180185084377) internal successors, (2597), 1857 states have internal predecessors, (2597), 319 states have call successors, (319), 155 states have call predecessors, (319), 172 states have return successors, (458), 319 states have call predecessors, (458), 316 states have call successors, (458) [2022-11-23 16:07:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3374 transitions. [2022-11-23 16:07:34,415 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3374 transitions. Word has length 130 [2022-11-23 16:07:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:34,415 INFO L495 AbstractCegarLoop]: Abstraction has 2330 states and 3374 transitions. [2022-11-23 16:07:34,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3374 transitions. [2022-11-23 16:07:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:07:34,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:34,419 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, 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] [2022-11-23 16:07:34,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:34,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:34,626 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:34,627 INFO L85 PathProgramCache]: Analyzing trace with hash -584975270, now seen corresponding path program 1 times [2022-11-23 16:07:34,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:34,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683094287] [2022-11-23 16:07:34,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:34,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:07:34,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:34,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683094287] [2022-11-23 16:07:34,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683094287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:34,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857244602] [2022-11-23 16:07:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:34,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:34,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:34,788 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:34,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 16:07:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:35,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:07:35,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 16:07:35,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:35,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857244602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:35,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:07:35,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:07:35,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964998825] [2022-11-23 16:07:35,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:35,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:35,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:35,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:35,135 INFO L87 Difference]: Start difference. First operand 2330 states and 3374 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:35,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:35,881 INFO L93 Difference]: Finished difference Result 5529 states and 8698 transitions. [2022-11-23 16:07:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:35,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:07:35,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:35,899 INFO L225 Difference]: With dead ends: 5529 [2022-11-23 16:07:35,899 INFO L226 Difference]: Without dead ends: 3914 [2022-11-23 16:07:35,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:35,910 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 332 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:35,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 538 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:35,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2022-11-23 16:07:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3900. [2022-11-23 16:07:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3158 states have (on average 1.4556681443951869) internal successors, (4597), 3184 states have internal predecessors, (4597), 508 states have call successors, (508), 215 states have call predecessors, (508), 232 states have return successors, (751), 502 states have call predecessors, (751), 505 states have call successors, (751) [2022-11-23 16:07:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 5856 transitions. [2022-11-23 16:07:36,677 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 5856 transitions. Word has length 130 [2022-11-23 16:07:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:36,678 INFO L495 AbstractCegarLoop]: Abstraction has 3900 states and 5856 transitions. [2022-11-23 16:07:36,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 5856 transitions. [2022-11-23 16:07:36,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:07:36,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:36,687 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, 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] [2022-11-23 16:07:36,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:36,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 16:07:36,896 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 512307996, now seen corresponding path program 1 times [2022-11-23 16:07:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:36,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131125352] [2022-11-23 16:07:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:36,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:07:37,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131125352] [2022-11-23 16:07:37,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131125352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017299090] [2022-11-23 16:07:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:37,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:37,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:37,073 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:37,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 16:07:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:37,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:07:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 16:07:37,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:37,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017299090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:37,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:07:37,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:07:37,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898291268] [2022-11-23 16:07:37,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:37,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:37,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:37,394 INFO L87 Difference]: Start difference. First operand 3900 states and 5856 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:38,526 INFO L93 Difference]: Finished difference Result 10209 states and 16301 transitions. [2022-11-23 16:07:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:38,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:07:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:38,556 INFO L225 Difference]: With dead ends: 10209 [2022-11-23 16:07:38,557 INFO L226 Difference]: Without dead ends: 7024 [2022-11-23 16:07:38,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:38,572 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 314 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:38,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 538 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:07:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7024 states. [2022-11-23 16:07:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7024 to 7000. [2022-11-23 16:07:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7000 states, 5770 states have (on average 1.4795493934142114) internal successors, (8537), 5808 states have internal predecessors, (8537), 876 states have call successors, (876), 335 states have call predecessors, (876), 352 states have return successors, (1319), 858 states have call predecessors, (1319), 873 states have call successors, (1319) [2022-11-23 16:07:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7000 states to 7000 states and 10732 transitions. [2022-11-23 16:07:39,582 INFO L78 Accepts]: Start accepts. Automaton has 7000 states and 10732 transitions. Word has length 130 [2022-11-23 16:07:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:39,582 INFO L495 AbstractCegarLoop]: Abstraction has 7000 states and 10732 transitions. [2022-11-23 16:07:39,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7000 states and 10732 transitions. [2022-11-23 16:07:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:07:39,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:39,598 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, 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] [2022-11-23 16:07:39,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:39,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 16:07:39,807 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:39,807 INFO L85 PathProgramCache]: Analyzing trace with hash 177075806, now seen corresponding path program 1 times [2022-11-23 16:07:39,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:39,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324250171] [2022-11-23 16:07:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:39,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:07:39,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:39,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324250171] [2022-11-23 16:07:39,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324250171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:39,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370887765] [2022-11-23 16:07:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:39,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:39,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:39,949 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:39,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 16:07:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:40,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:07:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 16:07:40,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:40,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370887765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:40,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:07:40,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:07:40,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246742005] [2022-11-23 16:07:40,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:40,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:40,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:40,283 INFO L87 Difference]: Start difference. First operand 7000 states and 10732 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:42,311 INFO L93 Difference]: Finished difference Result 19449 states and 31225 transitions. [2022-11-23 16:07:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:42,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:07:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:42,380 INFO L225 Difference]: With dead ends: 19449 [2022-11-23 16:07:42,380 INFO L226 Difference]: Without dead ends: 13164 [2022-11-23 16:07:42,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:42,412 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 320 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:42,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 538 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:07:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2022-11-23 16:07:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 13120. [2022-11-23 16:07:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 10934 states have (on average 1.490488384854582) internal successors, (16297), 10996 states have internal predecessors, (16297), 1592 states have call successors, (1592), 575 states have call predecessors, (1592), 592 states have return successors, (2419), 1550 states have call predecessors, (2419), 1589 states have call successors, (2419) [2022-11-23 16:07:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 20308 transitions. [2022-11-23 16:07:44,192 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 20308 transitions. Word has length 130 [2022-11-23 16:07:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:44,192 INFO L495 AbstractCegarLoop]: Abstraction has 13120 states and 20308 transitions. [2022-11-23 16:07:44,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 20308 transitions. [2022-11-23 16:07:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:07:44,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:44,217 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, 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] [2022-11-23 16:07:44,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:44,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:44,430 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:44,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash -435175392, now seen corresponding path program 1 times [2022-11-23 16:07:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:44,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110964403] [2022-11-23 16:07:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:44,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:07:44,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:44,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110964403] [2022-11-23 16:07:44,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110964403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:44,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161236396] [2022-11-23 16:07:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:44,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:44,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:44,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:44,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 16:07:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:07:45,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 16:07:45,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:45,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161236396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:45,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:07:45,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:07:45,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483029652] [2022-11-23 16:07:45,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:45,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:45,099 INFO L87 Difference]: Start difference. First operand 13120 states and 20308 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:48,464 INFO L93 Difference]: Finished difference Result 37689 states and 60509 transitions. [2022-11-23 16:07:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:07:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:48,581 INFO L225 Difference]: With dead ends: 37689 [2022-11-23 16:07:48,582 INFO L226 Difference]: Without dead ends: 25284 [2022-11-23 16:07:48,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:48,632 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 326 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:48,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 538 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:07:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25284 states. [2022-11-23 16:07:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25284 to 25200. [2022-11-23 16:07:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25200 states, 21142 states have (on average 1.4935673067827073) internal successors, (31577), 21252 states have internal predecessors, (31577), 2984 states have call successors, (2984), 1055 states have call predecessors, (2984), 1072 states have return successors, (4547), 2894 states have call predecessors, (4547), 2981 states have call successors, (4547) [2022-11-23 16:07:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25200 states to 25200 states and 39108 transitions. [2022-11-23 16:07:52,912 INFO L78 Accepts]: Start accepts. Automaton has 25200 states and 39108 transitions. Word has length 130 [2022-11-23 16:07:52,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:52,912 INFO L495 AbstractCegarLoop]: Abstraction has 25200 states and 39108 transitions. [2022-11-23 16:07:52,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:07:52,912 INFO L276 IsEmpty]: Start isEmpty. Operand 25200 states and 39108 transitions. [2022-11-23 16:07:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:07:52,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:52,952 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, 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] [2022-11-23 16:07:52,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:53,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 16:07:53,162 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash 936357986, now seen corresponding path program 1 times [2022-11-23 16:07:53,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:53,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312130448] [2022-11-23 16:07:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:53,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:07:53,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:53,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312130448] [2022-11-23 16:07:53,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312130448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:53,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127586445] [2022-11-23 16:07:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:53,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:53,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:53,291 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:53,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 16:07:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:53,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:07:53,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:07:53,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:53,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127586445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:53,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:07:53,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 16:07:53,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562151369] [2022-11-23 16:07:53,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:53,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:53,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:53,614 INFO L87 Difference]: Start difference. First operand 25200 states and 39108 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:08:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:01,235 INFO L93 Difference]: Finished difference Result 73689 states and 117949 transitions. [2022-11-23 16:08:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:08:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-23 16:08:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:01,470 INFO L225 Difference]: With dead ends: 73689 [2022-11-23 16:08:01,470 INFO L226 Difference]: Without dead ends: 49204 [2022-11-23 16:08:01,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:08:01,574 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 311 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:01,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 538 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:08:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49204 states. [2022-11-23 16:08:08,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49204 to 49040. [2022-11-23 16:08:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49040 states, 41318 states have (on average 1.4922551914419866) internal successors, (61657), 41524 states have internal predecessors, (61657), 5688 states have call successors, (5688), 2015 states have call predecessors, (5688), 2032 states have return successors, (8659), 5502 states have call predecessors, (8659), 5685 states have call successors, (8659) [2022-11-23 16:08:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49040 states to 49040 states and 76004 transitions. [2022-11-23 16:08:08,802 INFO L78 Accepts]: Start accepts. Automaton has 49040 states and 76004 transitions. Word has length 130 [2022-11-23 16:08:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:08,803 INFO L495 AbstractCegarLoop]: Abstraction has 49040 states and 76004 transitions. [2022-11-23 16:08:08,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 16:08:08,804 INFO L276 IsEmpty]: Start isEmpty. Operand 49040 states and 76004 transitions. [2022-11-23 16:08:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 16:08:09,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:09,057 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, 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] [2022-11-23 16:08:09,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 16:08:09,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c6eee0-7c57-486a-b227-32153e38dab9/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 16:08:09,264 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:09,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:09,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1517714336, now seen corresponding path program 1 times [2022-11-23 16:08:09,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:09,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899737703] [2022-11-23 16:08:09,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:09,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 16:08:09,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899737703] [2022-11-23 16:08:09,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899737703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:09,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:08:09,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:08:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929178859] [2022-11-23 16:08:09,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:09,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:08:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:08:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:08:09,908 INFO L87 Difference]: Start difference. First operand 49040 states and 76004 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)