./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS --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 d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba --- 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-8393723 [2022-11-19 07:38:13,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:38:13,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:38:13,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:38:13,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:38:13,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:38:13,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:38:13,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:38:13,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:38:13,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:38:13,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:38:13,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:38:13,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:38:13,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:38:13,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:38:13,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:38:13,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:38:13,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:38:13,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:38:13,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:38:13,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:38:13,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:38:13,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:38:13,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:38:13,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:38:13,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:38:13,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:38:13,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:38:13,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:38:13,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:38:13,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:38:13,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:38:13,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:38:13,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:38:13,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:38:13,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:38:13,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:38:13,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:38:13,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:38:13,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:38:13,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:38:13,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:38:13,712 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:38:13,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:38:13,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:38:13,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:38:13,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:38:13,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:38:13,716 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:38:13,716 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:38:13,717 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:38:13,717 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:38:13,718 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:38:13,719 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:38:13,719 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:38:13,719 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:38:13,719 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:38:13,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:38:13,720 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:38:13,720 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:38:13,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:38:13,722 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:38:13,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:38:13,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:38:13,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:38:13,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:38:13,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:38:13,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:38:13,724 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:38:13,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:38:13,724 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:38:13,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:38:13,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:38:13,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:38:13,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:38:13,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:38:13,726 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:38:13,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:38:13,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:38:13,727 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:38:13,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:38:13,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:38:13,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:38:13,728 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_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba [2022-11-19 07:38:14,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:38:14,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:38:14,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:38:14,076 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:38:14,076 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:38:14,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2022-11-19 07:38:14,163 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/data/e764b5b49/aab26dcf0144456c85f8815d44219580/FLAGd8d857d0d [2022-11-19 07:38:14,739 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:38:14,739 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2022-11-19 07:38:14,749 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/data/e764b5b49/aab26dcf0144456c85f8815d44219580/FLAGd8d857d0d [2022-11-19 07:38:15,066 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/data/e764b5b49/aab26dcf0144456c85f8815d44219580 [2022-11-19 07:38:15,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:38:15,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:38:15,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:38:15,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:38:15,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:38:15,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67197c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15, skipping insertion in model container [2022-11-19 07:38:15,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:38:15,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:38:15,318 WARN L234 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_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/sv-benchmarks/c/systemc/token_ring.04.cil-1.c[671,684] [2022-11-19 07:38:15,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:38:15,405 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:38:15,416 WARN L234 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_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/sv-benchmarks/c/systemc/token_ring.04.cil-1.c[671,684] [2022-11-19 07:38:15,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:38:15,485 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:38:15,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15 WrapperNode [2022-11-19 07:38:15,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:38:15,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:38:15,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:38:15,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:38:15,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,556 INFO L138 Inliner]: procedures = 36, calls = 43, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 389 [2022-11-19 07:38:15,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:38:15,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:38:15,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:38:15,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:38:15,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,609 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:38:15,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:38:15,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:38:15,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:38:15,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (1/1) ... [2022-11-19 07:38:15,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:38:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:15,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:38:15,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:38:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:38:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:38:15,704 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:38:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:38:15,704 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:38:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:38:15,705 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:38:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:38:15,705 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:38:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:38:15,705 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:38:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:38:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:38:15,705 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:38:15,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:38:15,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:38:15,856 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:38:15,867 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:38:16,439 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:38:16,874 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:38:16,874 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-19 07:38:16,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:16 BoogieIcfgContainer [2022-11-19 07:38:16,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:38:16,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:38:16,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:38:16,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:38:16,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:38:15" (1/3) ... [2022-11-19 07:38:16,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4fe226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:16, skipping insertion in model container [2022-11-19 07:38:16,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:15" (2/3) ... [2022-11-19 07:38:16,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4fe226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:16, skipping insertion in model container [2022-11-19 07:38:16,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:16" (3/3) ... [2022-11-19 07:38:16,892 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-1.c [2022-11-19 07:38:16,913 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:38:16,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:38:17,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:38:17,019 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;@24331926, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:38:17,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:38:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 74 states have (on average 1.5135135135135136) internal successors, (112), 76 states have internal predecessors, (112), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 07:38:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 07:38:17,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:17,040 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] [2022-11-19 07:38:17,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash -228422504, now seen corresponding path program 1 times [2022-11-19 07:38:17,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:17,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210819925] [2022-11-19 07:38:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:17,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:38:17,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210819925] [2022-11-19 07:38:17,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210819925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:17,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:17,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:38:17,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742633117] [2022-11-19 07:38:17,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:17,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:38:17,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:17,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:38:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:38:17,630 INFO L87 Difference]: Start difference. First operand has 100 states, 74 states have (on average 1.5135135135135136) internal successors, (112), 76 states have internal predecessors, (112), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-11-19 07:38:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:18,017 INFO L93 Difference]: Finished difference Result 283 states and 434 transitions. [2022-11-19 07:38:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:38:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 42 [2022-11-19 07:38:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:18,030 INFO L225 Difference]: With dead ends: 283 [2022-11-19 07:38:18,030 INFO L226 Difference]: Without dead ends: 184 [2022-11-19 07:38:18,034 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 [2022-11-19 07:38:18,038 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 244 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:18,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 362 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:38:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-19 07:38:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-11-19 07:38:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 138 states have (on average 1.4202898550724639) internal successors, (196), 140 states have internal predecessors, (196), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-19 07:38:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 260 transitions. [2022-11-19 07:38:18,157 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 260 transitions. Word has length 42 [2022-11-19 07:38:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:18,158 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 260 transitions. [2022-11-19 07:38:18,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-11-19 07:38:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 260 transitions. [2022-11-19 07:38:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 07:38:18,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:18,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:18,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:38:18,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2001759660, now seen corresponding path program 1 times [2022-11-19 07:38:18,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:18,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759582624] [2022-11-19 07:38:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:18,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:38:18,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:18,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759582624] [2022-11-19 07:38:18,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759582624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:18,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12079114] [2022-11-19 07:38:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:18,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:18,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:18,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:18,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:38:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:18,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:18,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:38:18,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:18,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12079114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:18,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:18,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:38:18,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036121042] [2022-11-19 07:38:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:18,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:18,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:18,709 INFO L87 Difference]: Start difference. First operand 183 states and 260 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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) [2022-11-19 07:38:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:18,843 INFO L93 Difference]: Finished difference Result 532 states and 767 transitions. [2022-11-19 07:38:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:18,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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 79 [2022-11-19 07:38:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:18,854 INFO L225 Difference]: With dead ends: 532 [2022-11-19 07:38:18,854 INFO L226 Difference]: Without dead ends: 354 [2022-11-19 07:38:18,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:18,861 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 114 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:18,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 257 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-19 07:38:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 350. [2022-11-19 07:38:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 267 states have (on average 1.4119850187265917) internal successors, (377), 270 states have internal predecessors, (377), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-19 07:38:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 493 transitions. [2022-11-19 07:38:18,924 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 493 transitions. Word has length 79 [2022-11-19 07:38:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:18,924 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 493 transitions. [2022-11-19 07:38:18,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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) [2022-11-19 07:38:18,924 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 493 transitions. [2022-11-19 07:38:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 07:38:18,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:18,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:18,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:19,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:19,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1577242164, now seen corresponding path program 1 times [2022-11-19 07:38:19,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515333197] [2022-11-19 07:38:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:38:19,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:19,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515333197] [2022-11-19 07:38:19,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515333197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805527564] [2022-11-19 07:38:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:19,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:19,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:19,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:19,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:38:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:19,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:38:19,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:19,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805527564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:19,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:19,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:38:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687446475] [2022-11-19 07:38:19,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:19,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:19,529 INFO L87 Difference]: Start difference. First operand 350 states and 493 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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) [2022-11-19 07:38:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:19,672 INFO L93 Difference]: Finished difference Result 1027 states and 1468 transitions. [2022-11-19 07:38:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 79 [2022-11-19 07:38:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:19,677 INFO L225 Difference]: With dead ends: 1027 [2022-11-19 07:38:19,677 INFO L226 Difference]: Without dead ends: 682 [2022-11-19 07:38:19,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:19,680 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 117 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:19,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 256 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-19 07:38:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 676. [2022-11-19 07:38:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 519 states have (on average 1.4007707129094413) internal successors, (727), 524 states have internal predecessors, (727), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-19 07:38:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 943 transitions. [2022-11-19 07:38:19,749 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 943 transitions. Word has length 79 [2022-11-19 07:38:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:19,749 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 943 transitions. [2022-11-19 07:38:19,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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) [2022-11-19 07:38:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 943 transitions. [2022-11-19 07:38:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 07:38:19,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:19,753 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:19,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:19,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:19,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:19,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:19,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1057457748, now seen corresponding path program 1 times [2022-11-19 07:38:19,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:19,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029357180] [2022-11-19 07:38:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:19,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:38:20,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:20,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029357180] [2022-11-19 07:38:20,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029357180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:20,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:20,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:38:20,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27616726] [2022-11-19 07:38:20,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:20,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:38:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:20,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:38:20,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:20,389 INFO L87 Difference]: Start difference. First operand 676 states and 943 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:38:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:20,883 INFO L93 Difference]: Finished difference Result 2192 states and 3074 transitions. [2022-11-19 07:38:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:38:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 79 [2022-11-19 07:38:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:20,904 INFO L225 Difference]: With dead ends: 2192 [2022-11-19 07:38:20,904 INFO L226 Difference]: Without dead ends: 1522 [2022-11-19 07:38:20,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:38:20,910 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 422 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:20,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 333 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:38:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-11-19 07:38:21,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1296. [2022-11-19 07:38:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 995 states have (on average 1.385929648241206) internal successors, (1379), 1004 states have internal predecessors, (1379), 204 states have call successors, (204), 96 states have call predecessors, (204), 96 states have return successors, (204), 196 states have call predecessors, (204), 204 states have call successors, (204) [2022-11-19 07:38:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1787 transitions. [2022-11-19 07:38:21,085 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1787 transitions. Word has length 79 [2022-11-19 07:38:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:21,089 INFO L495 AbstractCegarLoop]: Abstraction has 1296 states and 1787 transitions. [2022-11-19 07:38:21,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:38:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1787 transitions. [2022-11-19 07:38:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 07:38:21,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:21,096 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:21,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:38:21,098 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:21,105 INFO L85 PathProgramCache]: Analyzing trace with hash -332475070, now seen corresponding path program 1 times [2022-11-19 07:38:21,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:21,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049630953] [2022-11-19 07:38:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:21,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:38:21,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:21,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049630953] [2022-11-19 07:38:21,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049630953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:21,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:21,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:38:21,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590207995] [2022-11-19 07:38:21,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:21,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:21,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:21,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:21,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:21,212 INFO L87 Difference]: Start difference. First operand 1296 states and 1787 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-19 07:38:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:21,445 INFO L93 Difference]: Finished difference Result 2294 states and 3200 transitions. [2022-11-19 07:38:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:21,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 80 [2022-11-19 07:38:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:21,457 INFO L225 Difference]: With dead ends: 2294 [2022-11-19 07:38:21,457 INFO L226 Difference]: Without dead ends: 1628 [2022-11-19 07:38:21,459 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 [2022-11-19 07:38:21,460 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 54 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:21,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 292 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2022-11-19 07:38:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1488. [2022-11-19 07:38:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1171 states have (on average 1.4235695986336465) internal successors, (1667), 1180 states have internal predecessors, (1667), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-19 07:38:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2091 transitions. [2022-11-19 07:38:21,610 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2091 transitions. Word has length 80 [2022-11-19 07:38:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:21,611 INFO L495 AbstractCegarLoop]: Abstraction has 1488 states and 2091 transitions. [2022-11-19 07:38:21,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-19 07:38:21,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2091 transitions. [2022-11-19 07:38:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-19 07:38:21,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:21,624 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, 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] [2022-11-19 07:38:21,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:38:21,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:21,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:21,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1688571254, now seen corresponding path program 1 times [2022-11-19 07:38:21,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:21,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420975133] [2022-11-19 07:38:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:21,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:38:22,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420975133] [2022-11-19 07:38:22,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420975133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:22,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959830739] [2022-11-19 07:38:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:22,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:22,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:22,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:22,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:38:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:22,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:22,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:38:22,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:22,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959830739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:22,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:22,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-11-19 07:38:22,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158032033] [2022-11-19 07:38:22,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:22,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:22,419 INFO L87 Difference]: Start difference. First operand 1488 states and 2091 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:38:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:22,782 INFO L93 Difference]: Finished difference Result 4405 states and 6264 transitions. [2022-11-19 07:38:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:22,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 119 [2022-11-19 07:38:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:22,800 INFO L225 Difference]: With dead ends: 4405 [2022-11-19 07:38:22,801 INFO L226 Difference]: Without dead ends: 2922 [2022-11-19 07:38:22,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:22,811 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 74 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:22,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 232 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2022-11-19 07:38:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2896. [2022-11-19 07:38:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2283 states have (on average 1.4099868593955323) internal successors, (3219), 2300 states have internal predecessors, (3219), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-19 07:38:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4027 transitions. [2022-11-19 07:38:23,125 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4027 transitions. Word has length 119 [2022-11-19 07:38:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:23,125 INFO L495 AbstractCegarLoop]: Abstraction has 2896 states and 4027 transitions. [2022-11-19 07:38:23,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:38:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4027 transitions. [2022-11-19 07:38:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-19 07:38:23,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:23,134 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:38:23,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:23,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:23,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1830057419, now seen corresponding path program 1 times [2022-11-19 07:38:23,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:23,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142326636] [2022-11-19 07:38:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:38:23,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:23,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142326636] [2022-11-19 07:38:23,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142326636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:23,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:23,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:38:23,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967281613] [2022-11-19 07:38:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:23,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:23,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:23,460 INFO L87 Difference]: Start difference. First operand 2896 states and 4027 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-11-19 07:38:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:23,868 INFO L93 Difference]: Finished difference Result 7225 states and 10112 transitions. [2022-11-19 07:38:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 105 [2022-11-19 07:38:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:23,887 INFO L225 Difference]: With dead ends: 7225 [2022-11-19 07:38:23,887 INFO L226 Difference]: Without dead ends: 4334 [2022-11-19 07:38:23,896 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 [2022-11-19 07:38:23,897 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 110 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:23,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 256 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4334 states. [2022-11-19 07:38:24,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4334 to 4308. [2022-11-19 07:38:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4308 states, 3399 states have (on average 1.3965872315386878) internal successors, (4747), 3424 states have internal predecessors, (4747), 596 states have call successors, (596), 312 states have call predecessors, (596), 312 states have return successors, (596), 572 states have call predecessors, (596), 596 states have call successors, (596) [2022-11-19 07:38:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4308 states to 4308 states and 5939 transitions. [2022-11-19 07:38:24,253 INFO L78 Accepts]: Start accepts. Automaton has 4308 states and 5939 transitions. Word has length 105 [2022-11-19 07:38:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:24,253 INFO L495 AbstractCegarLoop]: Abstraction has 4308 states and 5939 transitions. [2022-11-19 07:38:24,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-11-19 07:38:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4308 states and 5939 transitions. [2022-11-19 07:38:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:38:24,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:24,268 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, 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] [2022-11-19 07:38:24,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:38:24,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:24,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1134158982, now seen corresponding path program 1 times [2022-11-19 07:38:24,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:24,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105835263] [2022-11-19 07:38:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:24,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:38:24,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:24,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105835263] [2022-11-19 07:38:24,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105835263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:24,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069965834] [2022-11-19 07:38:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:24,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:24,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:24,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:38:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:24,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:24,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:38:24,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:24,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069965834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:24,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:24,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:38:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480135211] [2022-11-19 07:38:24,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:24,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:24,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:24,652 INFO L87 Difference]: Start difference. First operand 4308 states and 5939 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-11-19 07:38:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:25,148 INFO L93 Difference]: Finished difference Result 8088 states and 11273 transitions. [2022-11-19 07:38:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:25,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 122 [2022-11-19 07:38:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:25,176 INFO L225 Difference]: With dead ends: 8088 [2022-11-19 07:38:25,177 INFO L226 Difference]: Without dead ends: 5882 [2022-11-19 07:38:25,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:25,183 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 80 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:25,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 313 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:25,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2022-11-19 07:38:25,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 5052. [2022-11-19 07:38:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 4071 states have (on average 1.4283959715057726) internal successors, (5815), 4096 states have internal predecessors, (5815), 632 states have call successors, (632), 348 states have call predecessors, (632), 348 states have return successors, (632), 608 states have call predecessors, (632), 632 states have call successors, (632) [2022-11-19 07:38:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 7079 transitions. [2022-11-19 07:38:25,565 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 7079 transitions. Word has length 122 [2022-11-19 07:38:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:25,565 INFO L495 AbstractCegarLoop]: Abstraction has 5052 states and 7079 transitions. [2022-11-19 07:38:25,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-11-19 07:38:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 7079 transitions. [2022-11-19 07:38:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:38:25,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:25,581 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, 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] [2022-11-19 07:38:25,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 07:38:25,788 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1566415906, now seen corresponding path program 2 times [2022-11-19 07:38:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:25,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340496823] [2022-11-19 07:38:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:25,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:38:26,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:26,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340496823] [2022-11-19 07:38:26,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340496823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:26,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019545440] [2022-11-19 07:38:26,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:38:26,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:26,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:26,070 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:26,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:38:26,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:38:26,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:38:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:38:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:38:26,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:26,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019545440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:26,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:26,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:38:26,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109311327] [2022-11-19 07:38:26,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:26,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:26,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:26,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:26,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:26,253 INFO L87 Difference]: Start difference. First operand 5052 states and 7079 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2022-11-19 07:38:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:26,641 INFO L93 Difference]: Finished difference Result 8028 states and 11469 transitions. [2022-11-19 07:38:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:26,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 122 [2022-11-19 07:38:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:26,665 INFO L225 Difference]: With dead ends: 8028 [2022-11-19 07:38:26,665 INFO L226 Difference]: Without dead ends: 5078 [2022-11-19 07:38:26,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:26,674 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 111 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:26,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 320 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2022-11-19 07:38:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 5028. [2022-11-19 07:38:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 4047 states have (on average 1.4072152211514701) internal successors, (5695), 4072 states have internal predecessors, (5695), 632 states have call successors, (632), 348 states have call predecessors, (632), 348 states have return successors, (632), 608 states have call predecessors, (632), 632 states have call successors, (632) [2022-11-19 07:38:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 6959 transitions. [2022-11-19 07:38:27,145 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 6959 transitions. Word has length 122 [2022-11-19 07:38:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:27,146 INFO L495 AbstractCegarLoop]: Abstraction has 5028 states and 6959 transitions. [2022-11-19 07:38:27,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2022-11-19 07:38:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 6959 transitions. [2022-11-19 07:38:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:38:27,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:27,165 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:27,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:27,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:27,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1659548124, now seen corresponding path program 1 times [2022-11-19 07:38:27,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:27,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373159111] [2022-11-19 07:38:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:38:27,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:27,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373159111] [2022-11-19 07:38:27,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373159111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:27,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295701858] [2022-11-19 07:38:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:27,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:27,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:27,686 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:27,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:38:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:27,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:38:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:38:27,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:27,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295701858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:27,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:27,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:38:27,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327142565] [2022-11-19 07:38:27,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:27,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:27,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:27,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:27,948 INFO L87 Difference]: Start difference. First operand 5028 states and 6959 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2022-11-19 07:38:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:28,303 INFO L93 Difference]: Finished difference Result 8416 states and 11873 transitions. [2022-11-19 07:38:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 122 [2022-11-19 07:38:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:28,354 INFO L225 Difference]: With dead ends: 8416 [2022-11-19 07:38:28,354 INFO L226 Difference]: Without dead ends: 5046 [2022-11-19 07:38:28,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:28,365 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 105 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:28,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 298 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5046 states. [2022-11-19 07:38:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5046 to 4988. [2022-11-19 07:38:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4007 states have (on average 1.3853256800598952) internal successors, (5551), 4032 states have internal predecessors, (5551), 632 states have call successors, (632), 348 states have call predecessors, (632), 348 states have return successors, (632), 608 states have call predecessors, (632), 632 states have call successors, (632) [2022-11-19 07:38:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 6815 transitions. [2022-11-19 07:38:28,764 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 6815 transitions. Word has length 122 [2022-11-19 07:38:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:28,764 INFO L495 AbstractCegarLoop]: Abstraction has 4988 states and 6815 transitions. [2022-11-19 07:38:28,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2022-11-19 07:38:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 6815 transitions. [2022-11-19 07:38:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 07:38:28,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:28,781 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-11-19 07:38:28,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:28,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:28,987 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash 343457378, now seen corresponding path program 1 times [2022-11-19 07:38:28,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:28,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273378084] [2022-11-19 07:38:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:28,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:38:29,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273378084] [2022-11-19 07:38:29,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273378084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:29,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846022781] [2022-11-19 07:38:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:29,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:29,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:29,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:29,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:38:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:38:29,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:29,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846022781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:29,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:29,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:38:29,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580353820] [2022-11-19 07:38:29,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:29,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:29,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:29,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:29,467 INFO L87 Difference]: Start difference. First operand 4988 states and 6815 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-11-19 07:38:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:29,871 INFO L93 Difference]: Finished difference Result 9374 states and 12718 transitions. [2022-11-19 07:38:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:29,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 122 [2022-11-19 07:38:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:29,894 INFO L225 Difference]: With dead ends: 9374 [2022-11-19 07:38:29,895 INFO L226 Difference]: Without dead ends: 6064 [2022-11-19 07:38:29,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:29,908 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 116 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:29,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 159 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:38:29,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2022-11-19 07:38:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 6064. [2022-11-19 07:38:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6064 states, 4947 states have (on average 1.3412168991307862) internal successors, (6635), 4972 states have internal predecessors, (6635), 676 states have call successors, (676), 440 states have call predecessors, (676), 440 states have return successors, (676), 652 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-19 07:38:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6064 states to 6064 states and 7987 transitions. [2022-11-19 07:38:30,478 INFO L78 Accepts]: Start accepts. Automaton has 6064 states and 7987 transitions. Word has length 122 [2022-11-19 07:38:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:30,479 INFO L495 AbstractCegarLoop]: Abstraction has 6064 states and 7987 transitions. [2022-11-19 07:38:30,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-11-19 07:38:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6064 states and 7987 transitions. [2022-11-19 07:38:30,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:38:30,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:30,500 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-19 07:38:30,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:30,707 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:30,707 INFO L85 PathProgramCache]: Analyzing trace with hash -566209367, now seen corresponding path program 1 times [2022-11-19 07:38:30,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:30,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784214269] [2022-11-19 07:38:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:38:31,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:31,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784214269] [2022-11-19 07:38:31,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784214269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:31,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164881933] [2022-11-19 07:38:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:31,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:31,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:31,039 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:31,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:38:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:31,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:38:31,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:38:31,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:31,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164881933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:31,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:31,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-19 07:38:31,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152125813] [2022-11-19 07:38:31,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:31,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:38:31,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:31,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:38:31,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:38:31,296 INFO L87 Difference]: Start difference. First operand 6064 states and 7987 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:38:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:31,917 INFO L93 Difference]: Finished difference Result 8907 states and 11723 transitions. [2022-11-19 07:38:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:38:31,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 123 [2022-11-19 07:38:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:31,942 INFO L225 Difference]: With dead ends: 8907 [2022-11-19 07:38:31,942 INFO L226 Difference]: Without dead ends: 6596 [2022-11-19 07:38:31,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:38:31,951 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 126 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:31,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 474 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2022-11-19 07:38:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 6341. [2022-11-19 07:38:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6341 states, 5179 states have (on average 1.3340413207182853) internal successors, (6909), 5220 states have internal predecessors, (6909), 684 states have call successors, (684), 445 states have call predecessors, (684), 477 states have return successors, (716), 676 states have call predecessors, (716), 684 states have call successors, (716) [2022-11-19 07:38:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6341 states to 6341 states and 8309 transitions. [2022-11-19 07:38:32,463 INFO L78 Accepts]: Start accepts. Automaton has 6341 states and 8309 transitions. Word has length 123 [2022-11-19 07:38:32,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:32,463 INFO L495 AbstractCegarLoop]: Abstraction has 6341 states and 8309 transitions. [2022-11-19 07:38:32,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:38:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 6341 states and 8309 transitions. [2022-11-19 07:38:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:38:32,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:32,484 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-19 07:38:32,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:32,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:38:32,691 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1484960078, now seen corresponding path program 1 times [2022-11-19 07:38:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:32,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406755320] [2022-11-19 07:38:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:38:32,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:32,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406755320] [2022-11-19 07:38:32,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406755320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:32,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788796326] [2022-11-19 07:38:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:32,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:32,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:32,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:32,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:38:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:33,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:38:33,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:38:33,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:33,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788796326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:33,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:33,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:38:33,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459239540] [2022-11-19 07:38:33,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:33,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:33,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:33,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:33,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:33,120 INFO L87 Difference]: Start difference. First operand 6341 states and 8309 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2022-11-19 07:38:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:33,529 INFO L93 Difference]: Finished difference Result 8736 states and 11555 transitions. [2022-11-19 07:38:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:33,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 124 [2022-11-19 07:38:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:33,550 INFO L225 Difference]: With dead ends: 8736 [2022-11-19 07:38:33,550 INFO L226 Difference]: Without dead ends: 6061 [2022-11-19 07:38:33,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:33,557 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 28 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:33,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 243 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:38:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2022-11-19 07:38:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 5645. [2022-11-19 07:38:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5645 states, 4579 states have (on average 1.3498580476086481) internal successors, (6181), 4596 states have internal predecessors, (6181), 652 states have call successors, (652), 413 states have call predecessors, (652), 413 states have return successors, (652), 636 states have call predecessors, (652), 652 states have call successors, (652) [2022-11-19 07:38:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5645 states to 5645 states and 7485 transitions. [2022-11-19 07:38:33,945 INFO L78 Accepts]: Start accepts. Automaton has 5645 states and 7485 transitions. Word has length 124 [2022-11-19 07:38:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:33,945 INFO L495 AbstractCegarLoop]: Abstraction has 5645 states and 7485 transitions. [2022-11-19 07:38:33,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2022-11-19 07:38:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5645 states and 7485 transitions. [2022-11-19 07:38:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:38:33,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:33,959 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-19 07:38:33,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:34,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:38:34,166 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:34,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1541467746, now seen corresponding path program 1 times [2022-11-19 07:38:34,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:34,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47873913] [2022-11-19 07:38:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:34,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:38:34,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:34,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47873913] [2022-11-19 07:38:34,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47873913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:34,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716942109] [2022-11-19 07:38:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:34,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:34,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:34,377 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:34,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:38:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:34,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:38:34,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:38:34,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:34,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716942109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:34,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:34,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:38:34,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121224852] [2022-11-19 07:38:34,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:34,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:34,581 INFO L87 Difference]: Start difference. First operand 5645 states and 7485 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:38:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:35,175 INFO L93 Difference]: Finished difference Result 13611 states and 18326 transitions. [2022-11-19 07:38:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:35,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2022-11-19 07:38:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:35,207 INFO L225 Difference]: With dead ends: 13611 [2022-11-19 07:38:35,208 INFO L226 Difference]: Without dead ends: 8017 [2022-11-19 07:38:35,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:35,222 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 57 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:35,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 250 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8017 states. [2022-11-19 07:38:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8017 to 6405. [2022-11-19 07:38:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6405 states, 5265 states have (on average 1.3772079772079773) internal successors, (7251), 5283 states have internal predecessors, (7251), 689 states have call successors, (689), 450 states have call predecessors, (689), 450 states have return successors, (689), 672 states have call predecessors, (689), 689 states have call successors, (689) [2022-11-19 07:38:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 8629 transitions. [2022-11-19 07:38:35,787 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 8629 transitions. Word has length 124 [2022-11-19 07:38:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:35,787 INFO L495 AbstractCegarLoop]: Abstraction has 6405 states and 8629 transitions. [2022-11-19 07:38:35,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:38:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 8629 transitions. [2022-11-19 07:38:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:38:35,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:35,811 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:35,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:36,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:36,017 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:36,017 INFO L85 PathProgramCache]: Analyzing trace with hash -595649062, now seen corresponding path program 1 times [2022-11-19 07:38:36,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:36,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715767546] [2022-11-19 07:38:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:36,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:38:36,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:36,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715767546] [2022-11-19 07:38:36,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715767546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:36,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128458351] [2022-11-19 07:38:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:36,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:36,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:36,329 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:36,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:38:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:36,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:38:36,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:38:36,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:36,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128458351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:36,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:36,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-19 07:38:36,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917935834] [2022-11-19 07:38:36,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:36,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:38:36,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:38:36,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:36,624 INFO L87 Difference]: Start difference. First operand 6405 states and 8629 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:37,905 INFO L93 Difference]: Finished difference Result 15673 states and 21067 transitions. [2022-11-19 07:38:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:38:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 125 [2022-11-19 07:38:37,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:37,939 INFO L225 Difference]: With dead ends: 15673 [2022-11-19 07:38:37,939 INFO L226 Difference]: Without dead ends: 9319 [2022-11-19 07:38:37,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:38:37,956 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 402 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:37,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 265 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:38:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9319 states. [2022-11-19 07:38:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9319 to 9317. [2022-11-19 07:38:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9317 states, 7633 states have (on average 1.3529411764705883) internal successors, (10327), 7659 states have internal predecessors, (10327), 1013 states have call successors, (1013), 670 states have call predecessors, (1013), 670 states have return successors, (1013), 988 states have call predecessors, (1013), 1013 states have call successors, (1013) [2022-11-19 07:38:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9317 states to 9317 states and 12353 transitions. [2022-11-19 07:38:38,791 INFO L78 Accepts]: Start accepts. Automaton has 9317 states and 12353 transitions. Word has length 125 [2022-11-19 07:38:38,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:38,792 INFO L495 AbstractCegarLoop]: Abstraction has 9317 states and 12353 transitions. [2022-11-19 07:38:38,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9317 states and 12353 transitions. [2022-11-19 07:38:38,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:38:38,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:38,813 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-19 07:38:38,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:39,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:38:39,027 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1176270818, now seen corresponding path program 1 times [2022-11-19 07:38:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:39,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883004861] [2022-11-19 07:38:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:38:39,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:39,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883004861] [2022-11-19 07:38:39,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883004861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:39,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626805210] [2022-11-19 07:38:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:39,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:39,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:39,277 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:39,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:38:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:38:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:38:39,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:39,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626805210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:39,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:39,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-19 07:38:39,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250983767] [2022-11-19 07:38:39,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:39,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:38:39,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:38:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:39,526 INFO L87 Difference]: Start difference. First operand 9317 states and 12353 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:40,670 INFO L93 Difference]: Finished difference Result 22819 states and 30167 transitions. [2022-11-19 07:38:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:38:40,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-19 07:38:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:40,718 INFO L225 Difference]: With dead ends: 22819 [2022-11-19 07:38:40,719 INFO L226 Difference]: Without dead ends: 13553 [2022-11-19 07:38:40,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:38:40,738 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 340 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:40,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 318 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:38:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13553 states. [2022-11-19 07:38:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13553 to 13551. [2022-11-19 07:38:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13551 states, 11061 states have (on average 1.3267335683934545) internal successors, (14675), 11099 states have internal predecessors, (14675), 1491 states have call successors, (1491), 998 states have call predecessors, (1491), 998 states have return successors, (1491), 1454 states have call predecessors, (1491), 1491 states have call successors, (1491) [2022-11-19 07:38:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13551 states to 13551 states and 17657 transitions. [2022-11-19 07:38:41,844 INFO L78 Accepts]: Start accepts. Automaton has 13551 states and 17657 transitions. Word has length 127 [2022-11-19 07:38:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:41,845 INFO L495 AbstractCegarLoop]: Abstraction has 13551 states and 17657 transitions. [2022-11-19 07:38:41,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 13551 states and 17657 transitions. [2022-11-19 07:38:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:38:41,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:41,872 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-11-19 07:38:41,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 07:38:42,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:38:42,078 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:42,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2115715821, now seen corresponding path program 1 times [2022-11-19 07:38:42,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:42,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384134538] [2022-11-19 07:38:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:42,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 07:38:42,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:42,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384134538] [2022-11-19 07:38:42,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384134538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:42,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366689977] [2022-11-19 07:38:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:42,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:42,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:42,183 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:42,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:38:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:42,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:38:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:38:42,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:42,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366689977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:42,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:42,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:38:42,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107476937] [2022-11-19 07:38:42,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:42,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:42,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:42,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:42,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:42,370 INFO L87 Difference]: Start difference. First operand 13551 states and 17657 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-11-19 07:38:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:44,162 INFO L93 Difference]: Finished difference Result 25877 states and 34029 transitions. [2022-11-19 07:38:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 125 [2022-11-19 07:38:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:44,235 INFO L225 Difference]: With dead ends: 25877 [2022-11-19 07:38:44,235 INFO L226 Difference]: Without dead ends: 16879 [2022-11-19 07:38:44,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:44,260 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 72 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:44,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 304 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:38:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16879 states. [2022-11-19 07:38:45,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16879 to 15369. [2022-11-19 07:38:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 12663 states have (on average 1.3422569691226407) internal successors, (16997), 12701 states have internal predecessors, (16997), 1599 states have call successors, (1599), 1106 states have call predecessors, (1599), 1106 states have return successors, (1599), 1562 states have call predecessors, (1599), 1599 states have call successors, (1599) [2022-11-19 07:38:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 20195 transitions. [2022-11-19 07:38:45,312 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 20195 transitions. Word has length 125 [2022-11-19 07:38:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:45,312 INFO L495 AbstractCegarLoop]: Abstraction has 15369 states and 20195 transitions. [2022-11-19 07:38:45,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-11-19 07:38:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 20195 transitions. [2022-11-19 07:38:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:38:45,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:45,339 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-19 07:38:45,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:45,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:45,550 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:45,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1232656550, now seen corresponding path program 1 times [2022-11-19 07:38:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:45,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932786494] [2022-11-19 07:38:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:45,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:38:45,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:45,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932786494] [2022-11-19 07:38:45,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932786494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443694808] [2022-11-19 07:38:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:45,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:45,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:45,771 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:45,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:38:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:38:45,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:38:46,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:46,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443694808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:46,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:46,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-19 07:38:46,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228760039] [2022-11-19 07:38:46,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:46,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:38:46,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:46,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:38:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:38:46,004 INFO L87 Difference]: Start difference. First operand 15369 states and 20195 transitions. Second operand has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:47,916 INFO L93 Difference]: Finished difference Result 36680 states and 48065 transitions. [2022-11-19 07:38:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:38:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-19 07:38:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:47,979 INFO L225 Difference]: With dead ends: 36680 [2022-11-19 07:38:47,979 INFO L226 Difference]: Without dead ends: 21362 [2022-11-19 07:38:47,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:38:47,999 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 434 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:48,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 253 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:38:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21362 states. [2022-11-19 07:38:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21362 to 21360. [2022-11-19 07:38:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21360 states, 17498 states have (on average 1.3184935421190993) internal successors, (23071), 17554 states have internal predecessors, (23071), 2285 states have call successors, (2285), 1576 states have call predecessors, (2285), 1576 states have return successors, (2285), 2230 states have call predecessors, (2285), 2285 states have call successors, (2285) [2022-11-19 07:38:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21360 states to 21360 states and 27641 transitions. [2022-11-19 07:38:49,972 INFO L78 Accepts]: Start accepts. Automaton has 21360 states and 27641 transitions. Word has length 127 [2022-11-19 07:38:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:49,973 INFO L495 AbstractCegarLoop]: Abstraction has 21360 states and 27641 transitions. [2022-11-19 07:38:49,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:38:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 21360 states and 27641 transitions. [2022-11-19 07:38:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-19 07:38:50,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:50,017 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:50,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:50,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:38:50,223 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash 623370714, now seen corresponding path program 1 times [2022-11-19 07:38:50,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:50,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243126543] [2022-11-19 07:38:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:50,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:38:50,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243126543] [2022-11-19 07:38:50,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243126543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561737191] [2022-11-19 07:38:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:50,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:50,519 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:50,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:38:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:50,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:38:50,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:38:50,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:50,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561737191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:50,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:50,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:38:50,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665805231] [2022-11-19 07:38:50,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:50,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:50,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:50,763 INFO L87 Difference]: Start difference. First operand 21360 states and 27641 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:38:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:53,417 INFO L93 Difference]: Finished difference Result 39800 states and 51756 transitions. [2022-11-19 07:38:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:53,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 129 [2022-11-19 07:38:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:53,503 INFO L225 Difference]: With dead ends: 39800 [2022-11-19 07:38:53,503 INFO L226 Difference]: Without dead ends: 24918 [2022-11-19 07:38:53,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:53,534 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 89 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:53,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 170 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:38:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24918 states. [2022-11-19 07:38:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24918 to 24650. [2022-11-19 07:38:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24650 states, 20549 states have (on average 1.292666309796097) internal successors, (26563), 20605 states have internal predecessors, (26563), 2323 states have call successors, (2323), 1777 states have call predecessors, (2323), 1777 states have return successors, (2495), 2268 states have call predecessors, (2495), 2323 states have call successors, (2495) [2022-11-19 07:38:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24650 states to 24650 states and 31381 transitions. [2022-11-19 07:38:55,410 INFO L78 Accepts]: Start accepts. Automaton has 24650 states and 31381 transitions. Word has length 129 [2022-11-19 07:38:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:55,411 INFO L495 AbstractCegarLoop]: Abstraction has 24650 states and 31381 transitions. [2022-11-19 07:38:55,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:38:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 24650 states and 31381 transitions. [2022-11-19 07:38:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-19 07:38:55,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:55,445 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:55,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-19 07:38:55,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:55,651 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1437481536, now seen corresponding path program 1 times [2022-11-19 07:38:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:55,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975123517] [2022-11-19 07:38:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:38:55,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:55,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975123517] [2022-11-19 07:38:55,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975123517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:55,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246197999] [2022-11-19 07:38:55,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:55,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:55,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:55,922 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:55,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:38:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:56,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:38:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:38:56,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:56,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246197999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:56,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:56,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:38:56,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303276884] [2022-11-19 07:38:56,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:56,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:38:56,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:56,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:38:56,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:38:56,163 INFO L87 Difference]: Start difference. First operand 24650 states and 31381 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:38:58,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:58,641 INFO L93 Difference]: Finished difference Result 48740 states and 62257 transitions. [2022-11-19 07:38:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:38:58,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 131 [2022-11-19 07:38:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:58,743 INFO L225 Difference]: With dead ends: 48740 [2022-11-19 07:38:58,743 INFO L226 Difference]: Without dead ends: 31668 [2022-11-19 07:38:58,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:38:58,786 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 224 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:58,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 527 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:38:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31668 states. [2022-11-19 07:39:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31668 to 30042. [2022-11-19 07:39:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30042 states, 24955 states have (on average 1.2794630334602284) internal successors, (31929), 24975 states have internal predecessors, (31929), 2929 states have call successors, (2929), 2221 states have call predecessors, (2929), 2157 states have return successors, (3191), 2846 states have call predecessors, (3191), 2929 states have call successors, (3191) [2022-11-19 07:39:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30042 states to 30042 states and 38049 transitions. [2022-11-19 07:39:02,146 INFO L78 Accepts]: Start accepts. Automaton has 30042 states and 38049 transitions. Word has length 131 [2022-11-19 07:39:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:02,146 INFO L495 AbstractCegarLoop]: Abstraction has 30042 states and 38049 transitions. [2022-11-19 07:39:02,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:39:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 30042 states and 38049 transitions. [2022-11-19 07:39:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:39:02,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:02,174 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:39:02,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:02,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:02,375 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:02,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1139131797, now seen corresponding path program 1 times [2022-11-19 07:39:02,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:02,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745431341] [2022-11-19 07:39:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:02,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 07:39:02,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:02,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745431341] [2022-11-19 07:39:02,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745431341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:02,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693261105] [2022-11-19 07:39:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:02,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:02,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:02,482 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:02,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:39:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:39:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:39:02,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:02,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693261105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:02,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:02,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:39:02,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662570803] [2022-11-19 07:39:02,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:02,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:02,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:02,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:02,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:02,671 INFO L87 Difference]: Start difference. First operand 30042 states and 38049 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-11-19 07:39:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:06,273 INFO L93 Difference]: Finished difference Result 56356 states and 72131 transitions. [2022-11-19 07:39:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:06,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 125 [2022-11-19 07:39:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:06,374 INFO L225 Difference]: With dead ends: 56356 [2022-11-19 07:39:06,374 INFO L226 Difference]: Without dead ends: 36306 [2022-11-19 07:39:06,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:39:06,404 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 64 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:06,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 299 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:39:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36306 states. [2022-11-19 07:39:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36306 to 32992. [2022-11-19 07:39:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32992 states, 27521 states have (on average 1.2898150503252062) internal successors, (35497), 27541 states have internal predecessors, (35497), 3121 states have call successors, (3121), 2413 states have call predecessors, (3121), 2349 states have return successors, (3383), 3038 states have call predecessors, (3383), 3121 states have call successors, (3383) [2022-11-19 07:39:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32992 states to 32992 states and 42001 transitions. [2022-11-19 07:39:09,700 INFO L78 Accepts]: Start accepts. Automaton has 32992 states and 42001 transitions. Word has length 125 [2022-11-19 07:39:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:09,701 INFO L495 AbstractCegarLoop]: Abstraction has 32992 states and 42001 transitions. [2022-11-19 07:39:09,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-11-19 07:39:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 32992 states and 42001 transitions. [2022-11-19 07:39:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 07:39:09,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:09,727 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:09,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:09,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:09,927 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1024461446, now seen corresponding path program 1 times [2022-11-19 07:39:09,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:09,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105861769] [2022-11-19 07:39:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:09,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:39:10,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105861769] [2022-11-19 07:39:10,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105861769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534786514] [2022-11-19 07:39:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:10,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:10,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:10,052 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:10,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2c3f4b9-e0d4-4ec0-9c11-effaac86be65/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:39:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:10,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:39:10,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 51 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:39:10,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:39:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 07:39:11,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534786514] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:11,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:39:11,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 8] total 13 [2022-11-19 07:39:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161482218] [2022-11-19 07:39:11,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:11,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:39:11,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:39:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:39:11,095 INFO L87 Difference]: Start difference. First operand 32992 states and 42001 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:39:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:14,610 INFO L93 Difference]: Finished difference Result 54008 states and 68972 transitions. [2022-11-19 07:39:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:39:14,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2022-11-19 07:39:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:14,696 INFO L225 Difference]: With dead ends: 54008 [2022-11-19 07:39:14,696 INFO L226 Difference]: Without dead ends: 37259 [2022-11-19 07:39:14,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:39:14,730 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 121 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:14,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 313 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:39:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37259 states.