./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI --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 42e706fd1a5bd201d46dd2f3322f156b6d900789b8c9ace16cba5458f69fdc62 --- 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-5e519f3 [2022-11-03 02:05:27,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:05:27,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:05:27,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:05:27,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:05:27,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:05:27,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:05:27,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:05:27,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:05:27,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:05:27,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:05:27,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:05:27,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:05:27,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:05:27,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:05:27,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:05:27,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:05:27,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:05:27,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:05:27,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:05:27,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:05:27,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:05:27,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:05:27,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:05:27,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:05:27,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:05:27,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:05:27,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:05:27,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:05:27,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:05:27,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:05:27,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:05:27,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:05:27,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:05:27,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:05:27,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:05:27,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:05:27,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:05:27,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:05:27,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:05:27,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:05:27,671 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:05:27,721 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:05:27,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:05:27,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:05:27,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:05:27,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:05:27,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:05:27,724 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:05:27,724 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:05:27,725 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:05:27,725 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:05:27,726 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:05:27,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:05:27,727 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:05:27,727 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:05:27,727 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:05:27,727 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:05:27,728 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:05:27,728 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:05:27,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:05:27,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:05:27,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:05:27,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:05:27,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:05:27,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:05:27,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:05:27,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:05:27,731 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:05:27,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:05:27,731 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:05:27,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:05:27,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:05:27,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:05:27,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:27,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:05:27,733 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:05:27,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:05:27,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:05:27,734 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:05:27,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:05:27,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:05:27,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:05:27,736 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_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42e706fd1a5bd201d46dd2f3322f156b6d900789b8c9ace16cba5458f69fdc62 [2022-11-03 02:05:28,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:05:28,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:05:28,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:05:28,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:05:28,177 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:05:28,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.08.cil-1.c [2022-11-03 02:05:28,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/data/6f800b745/8a10014f2c834ad59d3c712b3dc21a34/FLAG1838f5bd5 [2022-11-03 02:05:28,832 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:05:28,832 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/sv-benchmarks/c/systemc/token_ring.08.cil-1.c [2022-11-03 02:05:28,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/data/6f800b745/8a10014f2c834ad59d3c712b3dc21a34/FLAG1838f5bd5 [2022-11-03 02:05:29,154 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/data/6f800b745/8a10014f2c834ad59d3c712b3dc21a34 [2022-11-03 02:05:29,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:05:29,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:05:29,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:29,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:05:29,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:05:29,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc8a54a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29, skipping insertion in model container [2022-11-03 02:05:29,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:05:29,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:05:29,468 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/sv-benchmarks/c/systemc/token_ring.08.cil-1.c[671,684] [2022-11-03 02:05:29,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:29,662 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:05:29,677 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/sv-benchmarks/c/systemc/token_ring.08.cil-1.c[671,684] [2022-11-03 02:05:29,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:29,809 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:05:29,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29 WrapperNode [2022-11-03 02:05:29,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:29,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:29,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:05:29,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:05:29,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,900 INFO L138 Inliner]: procedures = 44, calls = 55, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 621 [2022-11-03 02:05:29,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:29,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:05:29,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:05:29,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:05:29,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,950 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:05:29,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:05:29,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:05:29,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:05:29,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (1/1) ... [2022-11-03 02:05:29,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:29,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:30,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:05:30,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:05:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:05:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:05:30,056 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:05:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:05:30,056 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:05:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:05:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:05:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:05:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:05:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:05:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:05:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:05:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:05:30,058 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:05:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:05:30,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:05:30,200 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:05:30,202 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:05:31,051 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:05:31,480 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:05:31,480 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-03 02:05:31,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:31 BoogieIcfgContainer [2022-11-03 02:05:31,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:05:31,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:05:31,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:05:31,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:05:31,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:05:29" (1/3) ... [2022-11-03 02:05:31,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303df85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:31, skipping insertion in model container [2022-11-03 02:05:31,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:29" (2/3) ... [2022-11-03 02:05:31,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303df85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:31, skipping insertion in model container [2022-11-03 02:05:31,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:31" (3/3) ... [2022-11-03 02:05:31,495 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.08.cil-1.c [2022-11-03 02:05:31,514 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:05:31,515 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:05:31,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:05:31,588 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;@69092673, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:05:31,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:05:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 114 states have (on average 1.543859649122807) internal successors, (176), 116 states have internal predecessors, (176), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-03 02:05:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:05:31,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:31,615 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] [2022-11-03 02:05:31,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:31,623 INFO L85 PathProgramCache]: Analyzing trace with hash -496660782, now seen corresponding path program 1 times [2022-11-03 02:05:31,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:31,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212067464] [2022-11-03 02:05:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:31,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:32,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:32,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212067464] [2022-11-03 02:05:32,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212067464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:32,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:32,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:05:32,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974452508] [2022-11-03 02:05:32,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:32,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:05:32,197 INFO L87 Difference]: Start difference. First operand has 144 states, 114 states have (on average 1.543859649122807) internal successors, (176), 116 states have internal predecessors, (176), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:05:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:32,625 INFO L93 Difference]: Finished difference Result 416 states and 648 transitions. [2022-11-03 02:05:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:05:32,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-11-03 02:05:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:32,641 INFO L225 Difference]: With dead ends: 416 [2022-11-03 02:05:32,641 INFO L226 Difference]: Without dead ends: 273 [2022-11-03 02:05:32,646 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 [2022-11-03 02:05:32,650 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 380 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:32,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 586 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:05:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-03 02:05:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2022-11-03 02:05:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 219 states have (on average 1.4977168949771689) internal successors, (328), 221 states have internal predecessors, (328), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:05:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 408 transitions. [2022-11-03 02:05:32,745 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 408 transitions. Word has length 54 [2022-11-03 02:05:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:32,746 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 408 transitions. [2022-11-03 02:05:32,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:05:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 408 transitions. [2022-11-03 02:05:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:05:32,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:32,753 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:32,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:05:32,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:32,754 INFO L85 PathProgramCache]: Analyzing trace with hash -748429062, now seen corresponding path program 1 times [2022-11-03 02:05:32,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:32,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118401951] [2022-11-03 02:05:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:32,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:05:33,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:33,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118401951] [2022-11-03 02:05:33,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118401951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:33,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442571906] [2022-11-03 02:05:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:33,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:33,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:33,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:33,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:05:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:05:33,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:05:33,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:33,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442571906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:33,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:33,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:05:33,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968046839] [2022-11-03 02:05:33,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:33,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:33,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:33,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:33,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:33,482 INFO L87 Difference]: Start difference. First operand 272 states and 408 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:05:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:33,711 INFO L93 Difference]: Finished difference Result 799 states and 1219 transitions. [2022-11-03 02:05:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:33,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 107 [2022-11-03 02:05:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:33,724 INFO L225 Difference]: With dead ends: 799 [2022-11-03 02:05:33,725 INFO L226 Difference]: Without dead ends: 532 [2022-11-03 02:05:33,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:33,733 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 190 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:33,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 386 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:05:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-03 02:05:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 528. [2022-11-03 02:05:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 429 states have (on average 1.494172494172494) internal successors, (641), 432 states have internal predecessors, (641), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-03 02:05:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 789 transitions. [2022-11-03 02:05:33,808 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 789 transitions. Word has length 107 [2022-11-03 02:05:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:33,809 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 789 transitions. [2022-11-03 02:05:33,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:05:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 789 transitions. [2022-11-03 02:05:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:05:33,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:33,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:33,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:34,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1077686106, now seen corresponding path program 1 times [2022-11-03 02:05:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:34,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236143766] [2022-11-03 02:05:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:05:34,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236143766] [2022-11-03 02:05:34,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236143766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643580146] [2022-11-03 02:05:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:34,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:34,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:34,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:05:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:34,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:05:34,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:05:34,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:34,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643580146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:34,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:34,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:05:34,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340659813] [2022-11-03 02:05:34,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:34,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:34,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:34,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:34,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:34,583 INFO L87 Difference]: Start difference. First operand 528 states and 789 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:05:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:34,793 INFO L93 Difference]: Finished difference Result 1561 states and 2372 transitions. [2022-11-03 02:05:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:34,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 107 [2022-11-03 02:05:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:34,802 INFO L225 Difference]: With dead ends: 1561 [2022-11-03 02:05:34,802 INFO L226 Difference]: Without dead ends: 1038 [2022-11-03 02:05:34,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:34,809 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 187 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:34,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 385 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-03 02:05:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1032. [2022-11-03 02:05:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 843 states have (on average 1.4887307236061684) internal successors, (1255), 848 states have internal predecessors, (1255), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-11-03 02:05:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1535 transitions. [2022-11-03 02:05:34,903 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1535 transitions. Word has length 107 [2022-11-03 02:05:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:34,905 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1535 transitions. [2022-11-03 02:05:34,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:05:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1535 transitions. [2022-11-03 02:05:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:05:34,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:34,915 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:34,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:35,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:35,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:35,137 INFO L85 PathProgramCache]: Analyzing trace with hash -116556550, now seen corresponding path program 1 times [2022-11-03 02:05:35,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:35,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321491748] [2022-11-03 02:05:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:35,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:05:35,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321491748] [2022-11-03 02:05:35,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321491748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:35,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100786574] [2022-11-03 02:05:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:35,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:35,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:35,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:35,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:05:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:35,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:05:35,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:05:35,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:35,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100786574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:35,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:35,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:05:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498891144] [2022-11-03 02:05:35,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:35,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:35,635 INFO L87 Difference]: Start difference. First operand 1032 states and 1535 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:05:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:35,855 INFO L93 Difference]: Finished difference Result 3061 states and 4628 transitions. [2022-11-03 02:05:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:35,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 107 [2022-11-03 02:05:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:35,871 INFO L225 Difference]: With dead ends: 3061 [2022-11-03 02:05:35,871 INFO L226 Difference]: Without dead ends: 2034 [2022-11-03 02:05:35,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:35,877 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 181 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 358 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 [2022-11-03 02:05:35,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 358 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2022-11-03 02:05:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 2024. [2022-11-03 02:05:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 1659 states have (on average 1.4822182037371912) internal successors, (2459), 1668 states have internal predecessors, (2459), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-11-03 02:05:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2995 transitions. [2022-11-03 02:05:36,017 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2995 transitions. Word has length 107 [2022-11-03 02:05:36,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:36,018 INFO L495 AbstractCegarLoop]: Abstraction has 2024 states and 2995 transitions. [2022-11-03 02:05:36,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:05:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2995 transitions. [2022-11-03 02:05:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:05:36,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:36,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:36,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:36,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:36,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash -976125286, now seen corresponding path program 1 times [2022-11-03 02:05:36,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:36,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564728762] [2022-11-03 02:05:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:36,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:05:36,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:36,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564728762] [2022-11-03 02:05:36,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564728762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:36,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88911638] [2022-11-03 02:05:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:36,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:36,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:36,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:36,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:05:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:05:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:05:36,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:36,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88911638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:36,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:36,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-03 02:05:36,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220544746] [2022-11-03 02:05:36,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:36,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:36,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:36,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:36,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:05:36,644 INFO L87 Difference]: Start difference. First operand 2024 states and 2995 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:05:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:36,924 INFO L93 Difference]: Finished difference Result 6013 states and 9040 transitions. [2022-11-03 02:05:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:36,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 107 [2022-11-03 02:05:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:36,963 INFO L225 Difference]: With dead ends: 6013 [2022-11-03 02:05:36,963 INFO L226 Difference]: Without dead ends: 3994 [2022-11-03 02:05:36,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:05:36,972 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 175 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 358 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 [2022-11-03 02:05:36,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 358 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:36,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2022-11-03 02:05:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3976. [2022-11-03 02:05:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3267 states have (on average 1.475053565962657) internal successors, (4819), 3284 states have internal predecessors, (4819), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-11-03 02:05:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 5851 transitions. [2022-11-03 02:05:37,182 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 5851 transitions. Word has length 107 [2022-11-03 02:05:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:37,182 INFO L495 AbstractCegarLoop]: Abstraction has 3976 states and 5851 transitions. [2022-11-03 02:05:37,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:05:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 5851 transitions. [2022-11-03 02:05:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:05:37,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:37,191 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:37,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:37,419 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1626488890, now seen corresponding path program 1 times [2022-11-03 02:05:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:37,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710550192] [2022-11-03 02:05:37,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:05:37,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:37,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710550192] [2022-11-03 02:05:37,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710550192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:37,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:37,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:37,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474521267] [2022-11-03 02:05:37,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:37,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:37,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:37,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:37,547 INFO L87 Difference]: Start difference. First operand 3976 states and 5851 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:05:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:37,882 INFO L93 Difference]: Finished difference Result 7050 states and 10556 transitions. [2022-11-03 02:05:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:37,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 107 [2022-11-03 02:05:37,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:37,913 INFO L225 Difference]: With dead ends: 7050 [2022-11-03 02:05:37,913 INFO L226 Difference]: Without dead ends: 5032 [2022-11-03 02:05:37,919 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 [2022-11-03 02:05:37,920 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 92 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:37,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 455 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2022-11-03 02:05:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 4696. [2022-11-03 02:05:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 3955 states have (on average 1.517825537294564) internal successors, (6003), 3972 states have internal predecessors, (6003), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-03 02:05:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 7067 transitions. [2022-11-03 02:05:38,234 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 7067 transitions. Word has length 107 [2022-11-03 02:05:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:38,236 INFO L495 AbstractCegarLoop]: Abstraction has 4696 states and 7067 transitions. [2022-11-03 02:05:38,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:05:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 7067 transitions. [2022-11-03 02:05:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:05:38,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:38,254 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:38,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:05:38,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash 592991792, now seen corresponding path program 1 times [2022-11-03 02:05:38,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:38,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773687389] [2022-11-03 02:05:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:38,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:05:38,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:38,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773687389] [2022-11-03 02:05:38,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773687389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:38,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:38,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:38,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576943910] [2022-11-03 02:05:38,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:38,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:38,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:38,401 INFO L87 Difference]: Start difference. First operand 4696 states and 7067 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:05:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:38,920 INFO L93 Difference]: Finished difference Result 13933 states and 21216 transitions. [2022-11-03 02:05:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:38,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 145 [2022-11-03 02:05:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:38,972 INFO L225 Difference]: With dead ends: 13933 [2022-11-03 02:05:38,972 INFO L226 Difference]: Without dead ends: 9242 [2022-11-03 02:05:38,987 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 [2022-11-03 02:05:38,988 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 177 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:38,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 360 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-11-03 02:05:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 9192. [2022-11-03 02:05:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9192 states, 7747 states have (on average 1.5080676390860979) internal successors, (11683), 7780 states have internal predecessors, (11683), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-11-03 02:05:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9192 states to 9192 states and 13739 transitions. [2022-11-03 02:05:39,611 INFO L78 Accepts]: Start accepts. Automaton has 9192 states and 13739 transitions. Word has length 145 [2022-11-03 02:05:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:39,612 INFO L495 AbstractCegarLoop]: Abstraction has 9192 states and 13739 transitions. [2022-11-03 02:05:39,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:05:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 9192 states and 13739 transitions. [2022-11-03 02:05:39,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:05:39,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:39,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:39,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:05:39,643 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1524113622, now seen corresponding path program 1 times [2022-11-03 02:05:39,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:39,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069233622] [2022-11-03 02:05:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:39,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:05:39,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:39,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069233622] [2022-11-03 02:05:39,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069233622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:39,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:39,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:39,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245737485] [2022-11-03 02:05:39,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:39,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:39,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:39,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:39,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:39,792 INFO L87 Difference]: Start difference. First operand 9192 states and 13739 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:05:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:40,831 INFO L93 Difference]: Finished difference Result 27277 states and 41232 transitions. [2022-11-03 02:05:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 145 [2022-11-03 02:05:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:40,935 INFO L225 Difference]: With dead ends: 27277 [2022-11-03 02:05:40,935 INFO L226 Difference]: Without dead ends: 18090 [2022-11-03 02:05:40,969 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 [2022-11-03 02:05:40,969 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 179 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:40,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 360 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:05:40,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18090 states. [2022-11-03 02:05:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18090 to 17992. [2022-11-03 02:05:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17992 states, 15171 states have (on average 1.4977918396941534) internal successors, (22723), 15236 states have internal predecessors, (22723), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-11-03 02:05:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17992 states to 17992 states and 26699 transitions. [2022-11-03 02:05:41,979 INFO L78 Accepts]: Start accepts. Automaton has 17992 states and 26699 transitions. Word has length 145 [2022-11-03 02:05:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:41,981 INFO L495 AbstractCegarLoop]: Abstraction has 17992 states and 26699 transitions. [2022-11-03 02:05:41,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:05:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 17992 states and 26699 transitions. [2022-11-03 02:05:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:05:42,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:42,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:42,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:05:42,030 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1652512359, now seen corresponding path program 1 times [2022-11-03 02:05:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:42,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827188284] [2022-11-03 02:05:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:05:42,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:42,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827188284] [2022-11-03 02:05:42,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827188284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:42,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:42,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:42,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993848545] [2022-11-03 02:05:42,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:42,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:42,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:42,158 INFO L87 Difference]: Start difference. First operand 17992 states and 26699 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:05:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:44,051 INFO L93 Difference]: Finished difference Result 53389 states and 80080 transitions. [2022-11-03 02:05:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:44,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 145 [2022-11-03 02:05:44,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:44,216 INFO L225 Difference]: With dead ends: 53389 [2022-11-03 02:05:44,216 INFO L226 Difference]: Without dead ends: 35402 [2022-11-03 02:05:44,274 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 [2022-11-03 02:05:44,276 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 181 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:44,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 360 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35402 states. [2022-11-03 02:05:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35402 to 35208. [2022-11-03 02:05:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35208 states, 29699 states have (on average 1.4870197649752517) internal successors, (44163), 29828 states have internal predecessors, (44163), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-11-03 02:05:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35208 states to 35208 states and 51851 transitions. [2022-11-03 02:05:46,521 INFO L78 Accepts]: Start accepts. Automaton has 35208 states and 51851 transitions. Word has length 145 [2022-11-03 02:05:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:46,521 INFO L495 AbstractCegarLoop]: Abstraction has 35208 states and 51851 transitions. [2022-11-03 02:05:46,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:05:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 35208 states and 51851 transitions. [2022-11-03 02:05:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:05:46,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:46,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:46,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:05:46,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:46,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash -202576367, now seen corresponding path program 1 times [2022-11-03 02:05:46,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:46,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158105315] [2022-11-03 02:05:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:46,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:05:46,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:46,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158105315] [2022-11-03 02:05:46,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158105315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:46,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:46,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:46,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222448517] [2022-11-03 02:05:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:46,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:46,972 INFO L87 Difference]: Start difference. First operand 35208 states and 51851 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:05:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:50,079 INFO L93 Difference]: Finished difference Result 104461 states and 155408 transitions. [2022-11-03 02:05:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:50,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 145 [2022-11-03 02:05:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:50,479 INFO L225 Difference]: With dead ends: 104461 [2022-11-03 02:05:50,479 INFO L226 Difference]: Without dead ends: 69258 [2022-11-03 02:05:50,600 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 [2022-11-03 02:05:50,601 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 184 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:50,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 373 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:50,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69258 states. [2022-11-03 02:05:53,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69258 to 68872. [2022-11-03 02:05:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68872 states, 58115 states have (on average 1.4757463649660156) internal successors, (85763), 58372 states have internal predecessors, (85763), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-11-03 02:05:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68872 states to 68872 states and 100619 transitions. [2022-11-03 02:05:54,295 INFO L78 Accepts]: Start accepts. Automaton has 68872 states and 100619 transitions. Word has length 145 [2022-11-03 02:05:54,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:54,295 INFO L495 AbstractCegarLoop]: Abstraction has 68872 states and 100619 transitions. [2022-11-03 02:05:54,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:05:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 68872 states and 100619 transitions. [2022-11-03 02:05:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-03 02:05:54,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:54,586 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:05:54,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:05:54,587 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:54,588 INFO L85 PathProgramCache]: Analyzing trace with hash -759449740, now seen corresponding path program 1 times [2022-11-03 02:05:54,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:54,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273726799] [2022-11-03 02:05:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:54,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:05:55,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:55,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273726799] [2022-11-03 02:05:55,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273726799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:55,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097853944] [2022-11-03 02:05:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:55,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:55,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:55,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:55,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:05:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:05:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:05:56,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:56,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097853944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:56,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:56,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:05:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703041318] [2022-11-03 02:05:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:56,055 INFO L87 Difference]: Start difference. First operand 68872 states and 100619 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:05:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:59,364 INFO L93 Difference]: Finished difference Result 131980 states and 195085 transitions. [2022-11-03 02:05:59,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:59,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 166 [2022-11-03 02:05:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:59,882 INFO L225 Difference]: With dead ends: 131980 [2022-11-03 02:05:59,882 INFO L226 Difference]: Without dead ends: 96778 [2022-11-03 02:05:59,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:59,997 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 141 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:59,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 497 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96778 states. [2022-11-03 02:06:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96778 to 83720. [2022-11-03 02:06:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83720 states, 72195 states have (on average 1.5177089826165246) internal successors, (109571), 72452 states have internal predecessors, (109571), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-11-03 02:06:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83720 states to 83720 states and 125195 transitions. [2022-11-03 02:06:05,285 INFO L78 Accepts]: Start accepts. Automaton has 83720 states and 125195 transitions. Word has length 166 [2022-11-03 02:06:05,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:05,285 INFO L495 AbstractCegarLoop]: Abstraction has 83720 states and 125195 transitions. [2022-11-03 02:06:05,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:06:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 83720 states and 125195 transitions. [2022-11-03 02:06:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-03 02:06:06,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:06,100 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:06:06,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:06,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:06:06,316 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash 961826060, now seen corresponding path program 2 times [2022-11-03 02:06:06,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:06,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886545948] [2022-11-03 02:06:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 02:06:06,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:06,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886545948] [2022-11-03 02:06:06,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886545948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:06,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390057372] [2022-11-03 02:06:06,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:06:06,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:06,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:06,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:06,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:06:07,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:06:07,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:07,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:06:07,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:06:07,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:07,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390057372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:07,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:06:07,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:06:07,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592323056] [2022-11-03 02:06:07,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:07,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:06:07,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:07,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:06:07,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:06:07,131 INFO L87 Difference]: Start difference. First operand 83720 states and 125195 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:06:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:10,681 INFO L93 Difference]: Finished difference Result 134028 states and 204045 transitions. [2022-11-03 02:06:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:06:10,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 166 [2022-11-03 02:06:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:11,092 INFO L225 Difference]: With dead ends: 134028 [2022-11-03 02:06:11,092 INFO L226 Difference]: Without dead ends: 83978 [2022-11-03 02:06:11,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:06:11,237 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 172 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:11,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 502 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83978 states. [2022-11-03 02:06:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83978 to 83464. [2022-11-03 02:06:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83464 states, 71939 states have (on average 1.5053170046845243) internal successors, (108291), 72196 states have internal predecessors, (108291), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-11-03 02:06:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83464 states to 83464 states and 123915 transitions. [2022-11-03 02:06:16,064 INFO L78 Accepts]: Start accepts. Automaton has 83464 states and 123915 transitions. Word has length 166 [2022-11-03 02:06:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:16,065 INFO L495 AbstractCegarLoop]: Abstraction has 83464 states and 123915 transitions. [2022-11-03 02:06:16,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:06:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 83464 states and 123915 transitions. [2022-11-03 02:06:16,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-03 02:06:16,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:16,754 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:06:16,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:16,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:06:16,971 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1478466830, now seen corresponding path program 1 times [2022-11-03 02:06:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:16,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155209631] [2022-11-03 02:06:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:16,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 02:06:17,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:17,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155209631] [2022-11-03 02:06:17,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155209631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:17,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875074536] [2022-11-03 02:06:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:17,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:17,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:17,383 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:17,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da8516d-911b-4943-b25e-c2d29f5ad454/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:06:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:06:17,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:06:17,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:17,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875074536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:17,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:06:17,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:06:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459987608] [2022-11-03 02:06:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:06:17,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:06:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:06:17,669 INFO L87 Difference]: Start difference. First operand 83464 states and 123915 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:06:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:20,913 INFO L93 Difference]: Finished difference Result 126412 states and 190221 transitions. [2022-11-03 02:06:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:06:20,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 166 [2022-11-03 02:06:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:21,208 INFO L225 Difference]: With dead ends: 126412 [2022-11-03 02:06:21,208 INFO L226 Difference]: Without dead ends: 83722 [2022-11-03 02:06:21,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:06:21,354 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 173 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:21,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 489 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83722 states.