./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0 --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 06a3cb5dc06e83ae44b59088a65983410109ccc62fdf540c55c383c9af585403 --- 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-e04fb08 [2022-11-16 19:59:18,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:59:18,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:59:18,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:59:18,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:59:18,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:59:18,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:59:18,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:59:18,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:59:18,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:59:18,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:59:18,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:59:18,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:59:18,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:59:18,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:59:18,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:59:18,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:59:18,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:59:18,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:59:18,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:59:18,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:59:18,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:59:18,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:59:18,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:59:18,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:59:18,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:59:18,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:59:18,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:59:18,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:59:18,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:59:18,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:59:18,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:59:18,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:59:18,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:59:18,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:59:18,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:59:18,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:59:18,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:59:18,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:59:18,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:59:18,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:59:18,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:59:18,720 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:59:18,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:59:18,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:59:18,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:59:18,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:59:18,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:59:18,722 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:59:18,722 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:59:18,722 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:59:18,722 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:59:18,723 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:59:18,723 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:59:18,723 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:59:18,723 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:59:18,723 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:59:18,724 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:59:18,724 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:59:18,724 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:59:18,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:59:18,725 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:59:18,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:59:18,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:59:18,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:59:18,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:59:18,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:59:18,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:59:18,727 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:59:18,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:59:18,727 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:59:18,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:59:18,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:59:18,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:59:18,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:59:18,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:59:18,728 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:59:18,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:59:18,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:59:18,729 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:59:18,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:59:18,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:59:18,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:59:18,730 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_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06a3cb5dc06e83ae44b59088a65983410109ccc62fdf540c55c383c9af585403 [2022-11-16 19:59:19,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:59:19,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:59:19,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:59:19,131 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:59:19,132 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:59:19,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c [2022-11-16 19:59:19,223 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/data/2f0605301/2fa4864445264e92823a2015861dd013/FLAGfb0ee74f8 [2022-11-16 19:59:19,951 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:59:19,951 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c [2022-11-16 19:59:19,975 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/data/2f0605301/2fa4864445264e92823a2015861dd013/FLAGfb0ee74f8 [2022-11-16 19:59:20,131 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/data/2f0605301/2fa4864445264e92823a2015861dd013 [2022-11-16 19:59:20,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:59:20,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:59:20,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:59:20,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:59:20,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:59:20,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fa3d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20, skipping insertion in model container [2022-11-16 19:59:20,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:20,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:59:20,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:59:20,753 WARN L229 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_14c20568-f8b8-444a-8abd-db15e362b585/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c[61125,61138] [2022-11-16 19:59:20,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:59:20,769 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:59:20,943 WARN L229 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_14c20568-f8b8-444a-8abd-db15e362b585/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.UNBOUNDED.pals.c[61125,61138] [2022-11-16 19:59:20,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:59:20,978 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:59:20,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20 WrapperNode [2022-11-16 19:59:20,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:59:20,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:59:20,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:59:20,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:59:20,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,167 INFO L138 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 1973 [2022-11-16 19:59:21,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:59:21,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:59:21,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:59:21,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:59:21,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,239 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:59:21,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:59:21,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:59:21,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:59:21,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (1/1) ... [2022-11-16 19:59:21,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:59:21,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:21,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:59:21,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:59:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:59:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:59:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:59:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:59:21,727 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:59:21,745 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:59:23,786 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:59:25,946 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:59:25,947 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 19:59:25,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:59:25 BoogieIcfgContainer [2022-11-16 19:59:25,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:59:25,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:59:25,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:59:25,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:59:25,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:59:20" (1/3) ... [2022-11-16 19:59:25,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c6315a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:59:25, skipping insertion in model container [2022-11-16 19:59:25,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:20" (2/3) ... [2022-11-16 19:59:25,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c6315a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:59:25, skipping insertion in model container [2022-11-16 19:59:25,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:59:25" (3/3) ... [2022-11-16 19:59:25,974 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.UNBOUNDED.pals.c [2022-11-16 19:59:25,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:59:25,998 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:59:26,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:59:26,115 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;@54895d7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:59:26,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:59:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-16 19:59:26,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:26,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:26,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:26,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1823490200, now seen corresponding path program 1 times [2022-11-16 19:59:26,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:26,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556254099] [2022-11-16 19:59:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:36,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556254099] [2022-11-16 19:59:36,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556254099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:36,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:36,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:59:36,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087190651] [2022-11-16 19:59:36,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:36,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:59:36,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:59:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:36,913 INFO L87 Difference]: Start difference. First operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:37,550 INFO L93 Difference]: Finished difference Result 480 states and 822 transitions. [2022-11-16 19:59:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:59:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2022-11-16 19:59:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:37,570 INFO L225 Difference]: With dead ends: 480 [2022-11-16 19:59:37,571 INFO L226 Difference]: Without dead ends: 460 [2022-11-16 19:59:37,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:37,579 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 28 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:37,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1356 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:59:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-16 19:59:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2022-11-16 19:59:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions. [2022-11-16 19:59:37,705 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126 [2022-11-16 19:59:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:37,707 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 769 transitions. [2022-11-16 19:59:37,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions. [2022-11-16 19:59:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-16 19:59:37,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:37,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:37,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:59:37,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash 619936298, now seen corresponding path program 1 times [2022-11-16 19:59:37,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:37,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236570910] [2022-11-16 19:59:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:37,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:44,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:44,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236570910] [2022-11-16 19:59:44,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236570910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:44,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:44,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:59:44,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114797610] [2022-11-16 19:59:44,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:44,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:59:44,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:59:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:44,098 INFO L87 Difference]: Start difference. First operand 450 states and 769 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:44,580 INFO L93 Difference]: Finished difference Result 483 states and 819 transitions. [2022-11-16 19:59:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:59:44,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-16 19:59:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:44,585 INFO L225 Difference]: With dead ends: 483 [2022-11-16 19:59:44,586 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 19:59:44,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:44,588 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 26 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:44,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:59:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 19:59:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-16 19:59:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions. [2022-11-16 19:59:44,617 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127 [2022-11-16 19:59:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:44,618 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 768 transitions. [2022-11-16 19:59:44,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions. [2022-11-16 19:59:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-16 19:59:44,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:44,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:44,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:59:44,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:44,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1969922753, now seen corresponding path program 1 times [2022-11-16 19:59:44,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:44,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951348770] [2022-11-16 19:59:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:44,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:49,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:49,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951348770] [2022-11-16 19:59:49,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951348770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:49,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:49,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:59:49,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275223558] [2022-11-16 19:59:49,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:49,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:59:49,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:49,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:59:49,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:49,565 INFO L87 Difference]: Start difference. First operand 450 states and 768 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:49,980 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2022-11-16 19:59:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:59:49,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-11-16 19:59:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:49,985 INFO L225 Difference]: With dead ends: 483 [2022-11-16 19:59:49,985 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 19:59:49,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:49,987 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 24 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:49,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:59:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 19:59:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-16 19:59:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:50,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions. [2022-11-16 19:59:50,013 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128 [2022-11-16 19:59:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:50,015 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 767 transitions. [2022-11-16 19:59:50,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions. [2022-11-16 19:59:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 19:59:50,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:50,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:50,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:59:50,020 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash 875281651, now seen corresponding path program 1 times [2022-11-16 19:59:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:50,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079446527] [2022-11-16 19:59:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:50,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:54,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:54,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079446527] [2022-11-16 19:59:54,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079446527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:54,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:54,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:59:54,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000013788] [2022-11-16 19:59:54,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:54,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:59:54,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:54,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:59:54,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:54,705 INFO L87 Difference]: Start difference. First operand 450 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:55,128 INFO L93 Difference]: Finished difference Result 483 states and 817 transitions. [2022-11-16 19:59:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:59:55,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-16 19:59:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:55,132 INFO L225 Difference]: With dead ends: 483 [2022-11-16 19:59:55,132 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 19:59:55,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:55,134 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 22 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:55,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:59:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 19:59:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-16 19:59:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions. [2022-11-16 19:59:55,150 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129 [2022-11-16 19:59:55,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:55,151 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 766 transitions. [2022-11-16 19:59:55,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions. [2022-11-16 19:59:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 19:59:55,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:55,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:55,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:59:55,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:55,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1306597610, now seen corresponding path program 1 times [2022-11-16 19:59:55,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:55,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230340700] [2022-11-16 19:59:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:55,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:59,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:59,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230340700] [2022-11-16 19:59:59,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230340700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:59,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:59,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:59:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002959005] [2022-11-16 19:59:59,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:59,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:59:59,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:59:59,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:59,524 INFO L87 Difference]: Start difference. First operand 450 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:59,856 INFO L93 Difference]: Finished difference Result 483 states and 816 transitions. [2022-11-16 19:59:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:59:59,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-16 19:59:59,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:59,859 INFO L225 Difference]: With dead ends: 483 [2022-11-16 19:59:59,859 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 19:59:59,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:59:59,861 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 20 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:59,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1372 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:59:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 19:59:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-16 19:59:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions. [2022-11-16 19:59:59,884 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130 [2022-11-16 19:59:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:59,887 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 765 transitions. [2022-11-16 19:59:59,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions. [2022-11-16 19:59:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 19:59:59,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:59,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:59,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:59:59,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1797942204, now seen corresponding path program 1 times [2022-11-16 19:59:59,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:59,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741698396] [2022-11-16 19:59:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:59,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:00:03,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:03,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741698396] [2022-11-16 20:00:03,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741698396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:00:03,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:00:03,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:00:03,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355944237] [2022-11-16 20:00:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:00:03,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:00:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:00:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:03,600 INFO L87 Difference]: Start difference. First operand 450 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:03,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:03,909 INFO L93 Difference]: Finished difference Result 483 states and 815 transitions. [2022-11-16 20:00:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:00:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2022-11-16 20:00:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:03,913 INFO L225 Difference]: With dead ends: 483 [2022-11-16 20:00:03,913 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 20:00:03,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:03,916 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 18 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:03,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1371 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:00:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 20:00:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-16 20:00:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2022-11-16 20:00:03,932 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131 [2022-11-16 20:00:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:03,932 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2022-11-16 20:00:03,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2022-11-16 20:00:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-16 20:00:03,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:03,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:03,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:00:03,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash -232648028, now seen corresponding path program 1 times [2022-11-16 20:00:03,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:03,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418329402] [2022-11-16 20:00:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:03,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:00:09,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:09,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418329402] [2022-11-16 20:00:09,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418329402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:00:09,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:00:09,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:00:09,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404918215] [2022-11-16 20:00:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:00:09,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:00:09,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:00:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:09,059 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:09,395 INFO L93 Difference]: Finished difference Result 481 states and 811 transitions. [2022-11-16 20:00:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:00:09,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-11-16 20:00:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:09,398 INFO L225 Difference]: With dead ends: 481 [2022-11-16 20:00:09,398 INFO L226 Difference]: Without dead ends: 460 [2022-11-16 20:00:09,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:09,400 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 15 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:09,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1362 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:00:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-16 20:00:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2022-11-16 20:00:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.7) internal successors, (765), 450 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 765 transitions. [2022-11-16 20:00:09,421 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 765 transitions. Word has length 133 [2022-11-16 20:00:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:09,421 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 765 transitions. [2022-11-16 20:00:09,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 765 transitions. [2022-11-16 20:00:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 20:00:09,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:09,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:09,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 20:00:09,425 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:09,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:09,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1289771617, now seen corresponding path program 1 times [2022-11-16 20:00:09,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:09,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104965810] [2022-11-16 20:00:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:09,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:00:14,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:14,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104965810] [2022-11-16 20:00:14,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104965810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:00:14,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:00:14,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:00:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265336230] [2022-11-16 20:00:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:00:14,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:00:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:00:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:14,615 INFO L87 Difference]: Start difference. First operand 451 states and 765 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:15,003 INFO L93 Difference]: Finished difference Result 482 states and 812 transitions. [2022-11-16 20:00:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:00:15,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-16 20:00:15,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:15,006 INFO L225 Difference]: With dead ends: 482 [2022-11-16 20:00:15,006 INFO L226 Difference]: Without dead ends: 461 [2022-11-16 20:00:15,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:15,008 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 12 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:15,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2046 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:00:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-16 20:00:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2022-11-16 20:00:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2022-11-16 20:00:15,025 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 134 [2022-11-16 20:00:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:15,025 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2022-11-16 20:00:15,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2022-11-16 20:00:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 20:00:15,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:15,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:15,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:00:15,029 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash -265942457, now seen corresponding path program 1 times [2022-11-16 20:00:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:15,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539528592] [2022-11-16 20:00:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:15,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:00:19,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:19,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539528592] [2022-11-16 20:00:19,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539528592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:00:19,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:00:19,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:00:19,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045344324] [2022-11-16 20:00:19,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:00:19,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:00:19,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:00:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:19,194 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:19,531 INFO L93 Difference]: Finished difference Result 482 states and 809 transitions. [2022-11-16 20:00:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:00:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-11-16 20:00:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:19,534 INFO L225 Difference]: With dead ends: 482 [2022-11-16 20:00:19,534 INFO L226 Difference]: Without dead ends: 461 [2022-11-16 20:00:19,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:19,535 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 7 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:19,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1365 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:00:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-16 20:00:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 454. [2022-11-16 20:00:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6931567328918322) internal successors, (767), 453 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 767 transitions. [2022-11-16 20:00:19,552 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 767 transitions. Word has length 136 [2022-11-16 20:00:19,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:19,553 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 767 transitions. [2022-11-16 20:00:19,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:19,553 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 767 transitions. [2022-11-16 20:00:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-16 20:00:19,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:19,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:19,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 20:00:19,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash 334654053, now seen corresponding path program 1 times [2022-11-16 20:00:19,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:19,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584083211] [2022-11-16 20:00:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:19,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:00:20,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:20,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584083211] [2022-11-16 20:00:20,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584083211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:00:20,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:00:20,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:00:20,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065007160] [2022-11-16 20:00:20,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:00:20,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:00:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:00:20,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:00:20,108 INFO L87 Difference]: Start difference. First operand 454 states and 767 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:20,677 INFO L93 Difference]: Finished difference Result 505 states and 847 transitions. [2022-11-16 20:00:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:00:20,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-11-16 20:00:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:20,681 INFO L225 Difference]: With dead ends: 505 [2022-11-16 20:00:20,681 INFO L226 Difference]: Without dead ends: 484 [2022-11-16 20:00:20,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:00:20,682 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 47 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:20,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2754 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:00:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-16 20:00:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2022-11-16 20:00:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 456 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 769 transitions. [2022-11-16 20:00:20,700 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 769 transitions. Word has length 137 [2022-11-16 20:00:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:20,701 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 769 transitions. [2022-11-16 20:00:20,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 769 transitions. [2022-11-16 20:00:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-16 20:00:20,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:20,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:20,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 20:00:20,705 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:20,705 INFO L85 PathProgramCache]: Analyzing trace with hash 299069305, now seen corresponding path program 1 times [2022-11-16 20:00:20,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:20,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787378849] [2022-11-16 20:00:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:20,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:00:35,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:35,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787378849] [2022-11-16 20:00:35,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787378849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:00:35,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696991736] [2022-11-16 20:00:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:35,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:00:35,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:00:35,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c20568-f8b8-444a-8abd-db15e362b585/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:00:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:36,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:00:36,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:01:21,082 WARN L233 SmtUtils]: Spent 11.90s on a formula simplification. DAG size of input: 639 DAG size of output: 511 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:03:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:03:13,151 INFO L328 TraceCheckSpWp]: Computing backward predicates...