./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2218bd3b5024885ce258db0decccc6cd77d5db224efd54b84e54987ad5abfa77 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:34:02,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:34:02,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:34:02,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:34:02,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:34:02,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:34:02,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:34:02,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:34:02,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:34:02,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:34:02,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:34:02,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:34:02,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:34:02,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:34:02,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:34:02,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:34:02,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:34:02,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:34:02,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:34:02,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:34:02,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:34:02,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:34:02,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:34:02,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:34:02,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:34:02,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:34:02,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:34:02,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:34:02,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:34:02,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:34:02,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:34:02,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:34:02,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:34:02,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:34:02,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:34:02,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:34:02,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:34:02,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:34:02,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:34:02,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:34:02,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:34:02,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:34:02,720 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:34:02,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:34:02,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:34:02,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:34:02,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:34:02,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:34:02,721 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:34:02,721 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:34:02,721 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:34:02,732 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:34:02,732 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:34:02,733 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:34:02,733 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:34:02,733 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:34:02,733 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:34:02,733 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:34:02,734 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:34:02,734 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:34:02,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:34:02,735 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:34:02,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:34:02,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:34:02,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:34:02,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:34:02,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:34:02,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:34:02,736 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:34:02,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:34:02,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:34:02,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:34:02,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:34:02,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:34:02,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:34:02,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:34:02,738 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:34:02,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:34:02,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:34:02,738 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:34:02,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:34:02,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:34:02,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:34:02,739 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_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2218bd3b5024885ce258db0decccc6cd77d5db224efd54b84e54987ad5abfa77 [2022-12-14 07:34:02,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:34:02,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:34:02,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:34:02,942 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:34:02,942 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:34:02,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 07:34:05,541 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:34:05,679 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:34:05,680 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 07:34:05,687 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/data/168ec25b6/b983cf2aa9d44aa1833ced5d2dff3007/FLAGdcd104961 [2022-12-14 07:34:05,697 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/data/168ec25b6/b983cf2aa9d44aa1833ced5d2dff3007 [2022-12-14 07:34:05,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:34:05,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:34:05,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:34:05,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:34:05,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:34:05,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:05,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d85a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05, skipping insertion in model container [2022-12-14 07:34:05,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:05,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:34:05,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:34:05,878 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2022-12-14 07:34:05,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:34:05,924 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:34:05,955 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2022-12-14 07:34:05,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:34:05,992 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:34:05,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05 WrapperNode [2022-12-14 07:34:05,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:34:05,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:34:05,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:34:05,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:34:06,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,032 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 662 [2022-12-14 07:34:06,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:34:06,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:34:06,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:34:06,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:34:06,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,062 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:34:06,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:34:06,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:34:06,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:34:06,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (1/1) ... [2022-12-14 07:34:06,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:34:06,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:34:06,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:34:06,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:34:06,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:34:06,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:34:06,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:34:06,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:34:06,223 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:34:06,224 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:34:06,706 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:34:06,832 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:34:06,832 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 07:34:06,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:34:06 BoogieIcfgContainer [2022-12-14 07:34:06,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:34:06,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:34:06,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:34:06,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:34:06,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:34:05" (1/3) ... [2022-12-14 07:34:06,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41508f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:34:06, skipping insertion in model container [2022-12-14 07:34:06,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:34:05" (2/3) ... [2022-12-14 07:34:06,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41508f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:34:06, skipping insertion in model container [2022-12-14 07:34:06,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:34:06" (3/3) ... [2022-12-14 07:34:06,841 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 07:34:06,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:34:06,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:34:06,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:34:06,898 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;@778ea7df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:34:06,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:34:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 07:34:06,908 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:06,908 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] [2022-12-14 07:34:06,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash -958737111, now seen corresponding path program 1 times [2022-12-14 07:34:06,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:06,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985827404] [2022-12-14 07:34:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:06,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:07,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:07,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985827404] [2022-12-14 07:34:07,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985827404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:07,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:07,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:34:07,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783150234] [2022-12-14 07:34:07,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:07,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:34:07,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:34:07,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:34:07,334 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 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 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:07,582 INFO L93 Difference]: Finished difference Result 395 states and 633 transitions. [2022-12-14 07:34:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:34:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 53 [2022-12-14 07:34:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:07,593 INFO L225 Difference]: With dead ends: 395 [2022-12-14 07:34:07,593 INFO L226 Difference]: Without dead ends: 315 [2022-12-14 07:34:07,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:34:07,598 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 659 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:07,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 774 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:34:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-12-14 07:34:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 309. [2022-12-14 07:34:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.396103896103896) internal successors, (430), 308 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 430 transitions. [2022-12-14 07:34:07,662 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 430 transitions. Word has length 53 [2022-12-14 07:34:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:07,662 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 430 transitions. [2022-12-14 07:34:07,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 430 transitions. [2022-12-14 07:34:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 07:34:07,664 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:07,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:07,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:34:07,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:07,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1462812193, now seen corresponding path program 1 times [2022-12-14 07:34:07,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:07,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840811947] [2022-12-14 07:34:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:07,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:07,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:07,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840811947] [2022-12-14 07:34:07,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840811947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:07,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:07,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:34:07,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258078822] [2022-12-14 07:34:07,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:07,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:34:07,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:07,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:34:07,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:34:07,773 INFO L87 Difference]: Start difference. First operand 309 states and 430 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:08,023 INFO L93 Difference]: Finished difference Result 739 states and 1060 transitions. [2022-12-14 07:34:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:34:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-12-14 07:34:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:08,026 INFO L225 Difference]: With dead ends: 739 [2022-12-14 07:34:08,026 INFO L226 Difference]: Without dead ends: 479 [2022-12-14 07:34:08,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:34:08,028 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 460 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:08,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 182 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:34:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-12-14 07:34:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2022-12-14 07:34:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.4285714285714286) internal successors, (680), 476 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 680 transitions. [2022-12-14 07:34:08,106 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 680 transitions. Word has length 54 [2022-12-14 07:34:08,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:08,106 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 680 transitions. [2022-12-14 07:34:08,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 680 transitions. [2022-12-14 07:34:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 07:34:08,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:08,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:08,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:34:08,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash -508331265, now seen corresponding path program 1 times [2022-12-14 07:34:08,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:08,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111045969] [2022-12-14 07:34:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:08,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:08,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:08,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111045969] [2022-12-14 07:34:08,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111045969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:08,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:08,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:34:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083446173] [2022-12-14 07:34:08,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:08,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:34:08,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:34:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:34:08,222 INFO L87 Difference]: Start difference. First operand 477 states and 680 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:08,497 INFO L93 Difference]: Finished difference Result 1193 states and 1746 transitions. [2022-12-14 07:34:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:34:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-12-14 07:34:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:08,500 INFO L225 Difference]: With dead ends: 1193 [2022-12-14 07:34:08,500 INFO L226 Difference]: Without dead ends: 815 [2022-12-14 07:34:08,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:34:08,502 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 432 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:08,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 198 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:34:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-12-14 07:34:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 813. [2022-12-14 07:34:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.4532019704433496) internal successors, (1180), 812 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1180 transitions. [2022-12-14 07:34:08,568 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1180 transitions. Word has length 54 [2022-12-14 07:34:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:08,568 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1180 transitions. [2022-12-14 07:34:08,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1180 transitions. [2022-12-14 07:34:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 07:34:08,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:08,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:08,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:34:08,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1756392304, now seen corresponding path program 1 times [2022-12-14 07:34:08,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:08,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800079881] [2022-12-14 07:34:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:08,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:08,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800079881] [2022-12-14 07:34:08,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800079881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:08,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:08,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:34:08,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911877567] [2022-12-14 07:34:08,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:08,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:34:08,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:34:08,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:34:08,647 INFO L87 Difference]: Start difference. First operand 813 states and 1180 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:08,952 INFO L93 Difference]: Finished difference Result 2228 states and 3287 transitions. [2022-12-14 07:34:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:34:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-12-14 07:34:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:08,956 INFO L225 Difference]: With dead ends: 2228 [2022-12-14 07:34:08,956 INFO L226 Difference]: Without dead ends: 1487 [2022-12-14 07:34:08,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:34:08,959 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 437 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:08,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 190 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:34:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-12-14 07:34:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1485. [2022-12-14 07:34:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 1.463611859838275) internal successors, (2172), 1484 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2172 transitions. [2022-12-14 07:34:09,074 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2172 transitions. Word has length 54 [2022-12-14 07:34:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:09,074 INFO L495 AbstractCegarLoop]: Abstraction has 1485 states and 2172 transitions. [2022-12-14 07:34:09,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2172 transitions. [2022-12-14 07:34:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 07:34:09,075 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:09,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:09,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:34:09,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1769599762, now seen corresponding path program 1 times [2022-12-14 07:34:09,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:09,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859511056] [2022-12-14 07:34:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:09,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:09,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:09,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859511056] [2022-12-14 07:34:09,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859511056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:09,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:09,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:34:09,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860293558] [2022-12-14 07:34:09,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:09,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:34:09,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:09,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:34:09,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:34:09,181 INFO L87 Difference]: Start difference. First operand 1485 states and 2172 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:09,529 INFO L93 Difference]: Finished difference Result 3995 states and 5884 transitions. [2022-12-14 07:34:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:34:09,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-12-14 07:34:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:09,535 INFO L225 Difference]: With dead ends: 3995 [2022-12-14 07:34:09,535 INFO L226 Difference]: Without dead ends: 2543 [2022-12-14 07:34:09,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:34:09,537 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 453 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:09,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 174 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:34:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-12-14 07:34:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2541. [2022-12-14 07:34:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 1.4559055118110236) internal successors, (3698), 2540 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3698 transitions. [2022-12-14 07:34:09,741 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3698 transitions. Word has length 54 [2022-12-14 07:34:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:09,741 INFO L495 AbstractCegarLoop]: Abstraction has 2541 states and 3698 transitions. [2022-12-14 07:34:09,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3698 transitions. [2022-12-14 07:34:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 07:34:09,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:09,742 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] [2022-12-14 07:34:09,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:34:09,742 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:09,743 INFO L85 PathProgramCache]: Analyzing trace with hash 863065853, now seen corresponding path program 1 times [2022-12-14 07:34:09,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:09,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275906882] [2022-12-14 07:34:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:09,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:10,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275906882] [2022-12-14 07:34:10,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275906882] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:10,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:10,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 07:34:10,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141469290] [2022-12-14 07:34:10,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:10,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 07:34:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 07:34:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:34:10,571 INFO L87 Difference]: Start difference. First operand 2541 states and 3698 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:11,634 INFO L93 Difference]: Finished difference Result 5297 states and 7697 transitions. [2022-12-14 07:34:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:34:11,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 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 55 [2022-12-14 07:34:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:11,653 INFO L225 Difference]: With dead ends: 5297 [2022-12-14 07:34:11,653 INFO L226 Difference]: Without dead ends: 5295 [2022-12-14 07:34:11,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-14 07:34:11,656 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 553 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:11,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1291 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:34:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2022-12-14 07:34:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 4356. [2022-12-14 07:34:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 1.4507462686567165) internal successors, (6318), 4355 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 6318 transitions. [2022-12-14 07:34:12,146 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 6318 transitions. Word has length 55 [2022-12-14 07:34:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:12,146 INFO L495 AbstractCegarLoop]: Abstraction has 4356 states and 6318 transitions. [2022-12-14 07:34:12,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 6318 transitions. [2022-12-14 07:34:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 07:34:12,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:12,147 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] [2022-12-14 07:34:12,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:34:12,148 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash -487389507, now seen corresponding path program 1 times [2022-12-14 07:34:12,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:12,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776322902] [2022-12-14 07:34:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:12,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:12,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776322902] [2022-12-14 07:34:12,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776322902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:12,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:12,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 07:34:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898730849] [2022-12-14 07:34:12,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:12,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 07:34:12,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 07:34:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:34:12,912 INFO L87 Difference]: Start difference. First operand 4356 states and 6318 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:14,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:14,101 INFO L93 Difference]: Finished difference Result 4966 states and 7187 transitions. [2022-12-14 07:34:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:34:14,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 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 55 [2022-12-14 07:34:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:14,110 INFO L225 Difference]: With dead ends: 4966 [2022-12-14 07:34:14,110 INFO L226 Difference]: Without dead ends: 4964 [2022-12-14 07:34:14,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-14 07:34:14,112 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 511 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:14,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 1647 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:34:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2022-12-14 07:34:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 4376. [2022-12-14 07:34:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4376 states, 4375 states have (on average 1.4493714285714285) internal successors, (6341), 4375 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:14,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4376 states to 4376 states and 6341 transitions. [2022-12-14 07:34:14,557 INFO L78 Accepts]: Start accepts. Automaton has 4376 states and 6341 transitions. Word has length 55 [2022-12-14 07:34:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:14,558 INFO L495 AbstractCegarLoop]: Abstraction has 4376 states and 6341 transitions. [2022-12-14 07:34:14,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4376 states and 6341 transitions. [2022-12-14 07:34:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 07:34:14,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:14,558 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] [2022-12-14 07:34:14,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:34:14,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:14,559 INFO L85 PathProgramCache]: Analyzing trace with hash 328305373, now seen corresponding path program 1 times [2022-12-14 07:34:14,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:14,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865858832] [2022-12-14 07:34:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:14,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:15,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:15,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865858832] [2022-12-14 07:34:15,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865858832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:15,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:15,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-14 07:34:15,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354075567] [2022-12-14 07:34:15,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:15,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 07:34:15,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:15,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 07:34:15,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:34:15,168 INFO L87 Difference]: Start difference. First operand 4376 states and 6341 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:16,331 INFO L93 Difference]: Finished difference Result 6380 states and 9229 transitions. [2022-12-14 07:34:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:34:16,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 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 55 [2022-12-14 07:34:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:16,341 INFO L225 Difference]: With dead ends: 6380 [2022-12-14 07:34:16,342 INFO L226 Difference]: Without dead ends: 5594 [2022-12-14 07:34:16,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-12-14 07:34:16,344 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 609 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:16,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1711 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:34:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2022-12-14 07:34:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 5080. [2022-12-14 07:34:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5080 states, 5079 states have (on average 1.4465445953927938) internal successors, (7347), 5079 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5080 states to 5080 states and 7347 transitions. [2022-12-14 07:34:16,803 INFO L78 Accepts]: Start accepts. Automaton has 5080 states and 7347 transitions. Word has length 55 [2022-12-14 07:34:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:16,804 INFO L495 AbstractCegarLoop]: Abstraction has 5080 states and 7347 transitions. [2022-12-14 07:34:16,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 5080 states and 7347 transitions. [2022-12-14 07:34:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 07:34:16,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:16,804 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] [2022-12-14 07:34:16,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:34:16,804 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:16,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1489136413, now seen corresponding path program 1 times [2022-12-14 07:34:16,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:16,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153179848] [2022-12-14 07:34:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:16,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:17,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:17,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153179848] [2022-12-14 07:34:17,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153179848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:17,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:17,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-14 07:34:17,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076454136] [2022-12-14 07:34:17,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:17,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:34:17,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:34:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:34:17,800 INFO L87 Difference]: Start difference. First operand 5080 states and 7347 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:20,395 INFO L93 Difference]: Finished difference Result 8796 states and 12769 transitions. [2022-12-14 07:34:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 07:34:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 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 55 [2022-12-14 07:34:20,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:20,422 INFO L225 Difference]: With dead ends: 8796 [2022-12-14 07:34:20,422 INFO L226 Difference]: Without dead ends: 8794 [2022-12-14 07:34:20,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 07:34:20,425 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 803 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:20,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 1850 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:34:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8794 states. [2022-12-14 07:34:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8794 to 5705. [2022-12-14 07:34:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5704 states have (on average 1.4481065918653577) internal successors, (8260), 5704 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 8260 transitions. [2022-12-14 07:34:21,036 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 8260 transitions. Word has length 55 [2022-12-14 07:34:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:21,036 INFO L495 AbstractCegarLoop]: Abstraction has 5705 states and 8260 transitions. [2022-12-14 07:34:21,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 8260 transitions. [2022-12-14 07:34:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 07:34:21,037 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:21,037 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] [2022-12-14 07:34:21,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:34:21,037 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2081397871, now seen corresponding path program 1 times [2022-12-14 07:34:21,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:21,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886153572] [2022-12-14 07:34:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:22,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886153572] [2022-12-14 07:34:22,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886153572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:22,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:22,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 07:34:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693472155] [2022-12-14 07:34:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:22,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:34:22,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:34:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:34:22,329 INFO L87 Difference]: Start difference. First operand 5705 states and 8260 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:24,515 INFO L93 Difference]: Finished difference Result 6712 states and 9693 transitions. [2022-12-14 07:34:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:34:24,516 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 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 57 [2022-12-14 07:34:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:24,524 INFO L225 Difference]: With dead ends: 6712 [2022-12-14 07:34:24,524 INFO L226 Difference]: Without dead ends: 6710 [2022-12-14 07:34:24,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 07:34:24,526 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 739 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:24,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 1535 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 07:34:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2022-12-14 07:34:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 5711. [2022-12-14 07:34:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5710 states have (on average 1.4478108581436078) internal successors, (8267), 5710 states have internal predecessors, (8267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 8267 transitions. [2022-12-14 07:34:25,141 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 8267 transitions. Word has length 57 [2022-12-14 07:34:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:25,141 INFO L495 AbstractCegarLoop]: Abstraction has 5711 states and 8267 transitions. [2022-12-14 07:34:25,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:25,141 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 8267 transitions. [2022-12-14 07:34:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 07:34:25,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:25,142 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] [2022-12-14 07:34:25,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:34:25,142 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:25,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1265702991, now seen corresponding path program 1 times [2022-12-14 07:34:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:25,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676918274] [2022-12-14 07:34:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:25,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:26,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:26,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676918274] [2022-12-14 07:34:26,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676918274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:26,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:26,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 07:34:26,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374904311] [2022-12-14 07:34:26,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:26,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:34:26,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:26,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:34:26,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:34:26,123 INFO L87 Difference]: Start difference. First operand 5711 states and 8267 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:28,505 INFO L93 Difference]: Finished difference Result 7748 states and 11192 transitions. [2022-12-14 07:34:28,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:34:28,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 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 57 [2022-12-14 07:34:28,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:28,517 INFO L225 Difference]: With dead ends: 7748 [2022-12-14 07:34:28,517 INFO L226 Difference]: Without dead ends: 6962 [2022-12-14 07:34:28,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:34:28,521 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 1018 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:28,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 1603 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 07:34:28,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2022-12-14 07:34:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 5711. [2022-12-14 07:34:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5710 states have (on average 1.4478108581436078) internal successors, (8267), 5710 states have internal predecessors, (8267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 8267 transitions. [2022-12-14 07:34:29,285 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 8267 transitions. Word has length 57 [2022-12-14 07:34:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:29,285 INFO L495 AbstractCegarLoop]: Abstraction has 5711 states and 8267 transitions. [2022-12-14 07:34:29,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 8267 transitions. [2022-12-14 07:34:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 07:34:29,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:29,286 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] [2022-12-14 07:34:29,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:34:29,286 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash -590143631, now seen corresponding path program 1 times [2022-12-14 07:34:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:29,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448489853] [2022-12-14 07:34:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:29,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:29,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:29,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448489853] [2022-12-14 07:34:29,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448489853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:29,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:29,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-14 07:34:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508803694] [2022-12-14 07:34:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:29,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 07:34:29,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 07:34:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:34:29,945 INFO L87 Difference]: Start difference. First operand 5711 states and 8267 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:31,537 INFO L93 Difference]: Finished difference Result 6733 states and 9716 transitions. [2022-12-14 07:34:31,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 07:34:31,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 57 [2022-12-14 07:34:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:31,550 INFO L225 Difference]: With dead ends: 6733 [2022-12-14 07:34:31,550 INFO L226 Difference]: Without dead ends: 6731 [2022-12-14 07:34:31,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:34:31,553 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 432 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:31,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 2135 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:34:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6731 states. [2022-12-14 07:34:32,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6731 to 5721. [2022-12-14 07:34:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5721 states, 5720 states have (on average 1.4473776223776225) internal successors, (8279), 5720 states have internal predecessors, (8279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5721 states to 5721 states and 8279 transitions. [2022-12-14 07:34:32,252 INFO L78 Accepts]: Start accepts. Automaton has 5721 states and 8279 transitions. Word has length 57 [2022-12-14 07:34:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:32,252 INFO L495 AbstractCegarLoop]: Abstraction has 5721 states and 8279 transitions. [2022-12-14 07:34:32,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5721 states and 8279 transitions. [2022-12-14 07:34:32,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 07:34:32,253 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:32,253 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] [2022-12-14 07:34:32,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:34:32,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:32,253 INFO L85 PathProgramCache]: Analyzing trace with hash -372555791, now seen corresponding path program 1 times [2022-12-14 07:34:32,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:32,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100688473] [2022-12-14 07:34:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:33,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:33,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100688473] [2022-12-14 07:34:33,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100688473] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:33,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:33,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 07:34:33,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500135042] [2022-12-14 07:34:33,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:33,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:34:33,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:33,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:34:33,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:34:33,232 INFO L87 Difference]: Start difference. First operand 5721 states and 8279 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:36,011 INFO L93 Difference]: Finished difference Result 8499 states and 12300 transitions. [2022-12-14 07:34:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:34:36,012 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 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 57 [2022-12-14 07:34:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:36,020 INFO L225 Difference]: With dead ends: 8499 [2022-12-14 07:34:36,020 INFO L226 Difference]: Without dead ends: 8497 [2022-12-14 07:34:36,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:34:36,022 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 840 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:36,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 1541 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 07:34:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8497 states. [2022-12-14 07:34:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8497 to 5731. [2022-12-14 07:34:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5731 states, 5730 states have (on average 1.4471204188481674) internal successors, (8292), 5730 states have internal predecessors, (8292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5731 states to 5731 states and 8292 transitions. [2022-12-14 07:34:36,761 INFO L78 Accepts]: Start accepts. Automaton has 5731 states and 8292 transitions. Word has length 57 [2022-12-14 07:34:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:36,761 INFO L495 AbstractCegarLoop]: Abstraction has 5731 states and 8292 transitions. [2022-12-14 07:34:36,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5731 states and 8292 transitions. [2022-12-14 07:34:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 07:34:36,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:36,762 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] [2022-12-14 07:34:36,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:34:36,762 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1723011151, now seen corresponding path program 1 times [2022-12-14 07:34:36,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:36,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24089125] [2022-12-14 07:34:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:36,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:37,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:37,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24089125] [2022-12-14 07:34:37,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24089125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:37,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:37,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 07:34:37,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026299845] [2022-12-14 07:34:37,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:37,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:34:37,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:37,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:34:37,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:34:37,877 INFO L87 Difference]: Start difference. First operand 5731 states and 8292 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:40,703 INFO L93 Difference]: Finished difference Result 6363 states and 9182 transitions. [2022-12-14 07:34:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:34:40,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 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 57 [2022-12-14 07:34:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:40,710 INFO L225 Difference]: With dead ends: 6363 [2022-12-14 07:34:40,710 INFO L226 Difference]: Without dead ends: 6361 [2022-12-14 07:34:40,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 07:34:40,712 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 768 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:40,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 1354 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 07:34:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2022-12-14 07:34:41,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5731. [2022-12-14 07:34:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5731 states, 5730 states have (on average 1.4471204188481674) internal successors, (8292), 5730 states have internal predecessors, (8292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:41,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5731 states to 5731 states and 8292 transitions. [2022-12-14 07:34:41,455 INFO L78 Accepts]: Start accepts. Automaton has 5731 states and 8292 transitions. Word has length 57 [2022-12-14 07:34:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:41,455 INFO L495 AbstractCegarLoop]: Abstraction has 5731 states and 8292 transitions. [2022-12-14 07:34:41,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 5731 states and 8292 transitions. [2022-12-14 07:34:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 07:34:41,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:41,456 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] [2022-12-14 07:34:41,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 07:34:41,456 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:41,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:41,456 INFO L85 PathProgramCache]: Analyzing trace with hash -907316271, now seen corresponding path program 1 times [2022-12-14 07:34:41,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:41,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607410206] [2022-12-14 07:34:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:41,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:42,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:42,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607410206] [2022-12-14 07:34:42,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607410206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:42,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:42,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-12-14 07:34:42,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133256968] [2022-12-14 07:34:42,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:42,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:34:42,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:42,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:34:42,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:34:42,299 INFO L87 Difference]: Start difference. First operand 5731 states and 8292 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:45,097 INFO L93 Difference]: Finished difference Result 7900 states and 11390 transitions. [2022-12-14 07:34:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:34:45,098 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 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 57 [2022-12-14 07:34:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:45,105 INFO L225 Difference]: With dead ends: 7900 [2022-12-14 07:34:45,105 INFO L226 Difference]: Without dead ends: 7898 [2022-12-14 07:34:45,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 07:34:45,106 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 814 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:45,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 1708 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:34:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7898 states. [2022-12-14 07:34:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7898 to 5750. [2022-12-14 07:34:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 1.4461645503565836) internal successors, (8314), 5749 states have internal predecessors, (8314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 8314 transitions. [2022-12-14 07:34:45,911 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 8314 transitions. Word has length 57 [2022-12-14 07:34:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:45,911 INFO L495 AbstractCegarLoop]: Abstraction has 5750 states and 8314 transitions. [2022-12-14 07:34:45,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 8314 transitions. [2022-12-14 07:34:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 07:34:45,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:45,912 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] [2022-12-14 07:34:45,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 07:34:45,912 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 593687310, now seen corresponding path program 1 times [2022-12-14 07:34:45,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:45,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60211742] [2022-12-14 07:34:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:45,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:45,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:45,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60211742] [2022-12-14 07:34:45,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60211742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:45,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:45,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:34:45,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782988217] [2022-12-14 07:34:45,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:45,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:34:45,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:34:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:34:45,935 INFO L87 Difference]: Start difference. First operand 5750 states and 8314 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:46,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:46,752 INFO L93 Difference]: Finished difference Result 9937 states and 14435 transitions. [2022-12-14 07:34:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:34:46,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2022-12-14 07:34:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:46,757 INFO L225 Difference]: With dead ends: 9937 [2022-12-14 07:34:46,757 INFO L226 Difference]: Without dead ends: 5611 [2022-12-14 07:34:46,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:34:46,761 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 108 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:46,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 296 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:34:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2022-12-14 07:34:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 5565. [2022-12-14 07:34:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5565 states, 5564 states have (on average 1.4439252336448598) internal successors, (8034), 5564 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5565 states to 5565 states and 8034 transitions. [2022-12-14 07:34:47,543 INFO L78 Accepts]: Start accepts. Automaton has 5565 states and 8034 transitions. Word has length 58 [2022-12-14 07:34:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:47,543 INFO L495 AbstractCegarLoop]: Abstraction has 5565 states and 8034 transitions. [2022-12-14 07:34:47,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states and 8034 transitions. [2022-12-14 07:34:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 07:34:47,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:47,543 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] [2022-12-14 07:34:47,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 07:34:47,544 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -630584399, now seen corresponding path program 1 times [2022-12-14 07:34:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137677418] [2022-12-14 07:34:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:47,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:47,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137677418] [2022-12-14 07:34:47,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137677418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:47,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:47,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:34:47,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969427587] [2022-12-14 07:34:47,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:47,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:34:47,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:34:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:34:47,566 INFO L87 Difference]: Start difference. First operand 5565 states and 8034 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:48,450 INFO L93 Difference]: Finished difference Result 9289 states and 13474 transitions. [2022-12-14 07:34:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:34:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2022-12-14 07:34:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:48,455 INFO L225 Difference]: With dead ends: 9289 [2022-12-14 07:34:48,455 INFO L226 Difference]: Without dead ends: 5379 [2022-12-14 07:34:48,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:34:48,458 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 107 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:48,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 288 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:34:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2022-12-14 07:34:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 5376. [2022-12-14 07:34:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5376 states, 5375 states have (on average 1.441674418604651) internal successors, (7749), 5375 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5376 states to 5376 states and 7749 transitions. [2022-12-14 07:34:49,213 INFO L78 Accepts]: Start accepts. Automaton has 5376 states and 7749 transitions. Word has length 58 [2022-12-14 07:34:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:49,213 INFO L495 AbstractCegarLoop]: Abstraction has 5376 states and 7749 transitions. [2022-12-14 07:34:49,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 5376 states and 7749 transitions. [2022-12-14 07:34:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 07:34:49,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:49,214 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] [2022-12-14 07:34:49,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 07:34:49,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:49,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1175883996, now seen corresponding path program 1 times [2022-12-14 07:34:49,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:49,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662630001] [2022-12-14 07:34:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:49,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:49,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662630001] [2022-12-14 07:34:49,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662630001] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:49,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:49,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:34:49,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620603906] [2022-12-14 07:34:49,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:49,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:34:49,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:49,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:34:49,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:34:49,240 INFO L87 Difference]: Start difference. First operand 5376 states and 7749 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:50,139 INFO L93 Difference]: Finished difference Result 9108 states and 13190 transitions. [2022-12-14 07:34:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:34:50,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2022-12-14 07:34:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:50,143 INFO L225 Difference]: With dead ends: 9108 [2022-12-14 07:34:50,143 INFO L226 Difference]: Without dead ends: 5154 [2022-12-14 07:34:50,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:34:50,146 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 108 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:50,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 280 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:34:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5154 states. [2022-12-14 07:34:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5154 to 5152. [2022-12-14 07:34:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5152 states, 5151 states have (on average 1.440885264997088) internal successors, (7422), 5151 states have internal predecessors, (7422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5152 states to 5152 states and 7422 transitions. [2022-12-14 07:34:50,879 INFO L78 Accepts]: Start accepts. Automaton has 5152 states and 7422 transitions. Word has length 58 [2022-12-14 07:34:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:50,880 INFO L495 AbstractCegarLoop]: Abstraction has 5152 states and 7422 transitions. [2022-12-14 07:34:50,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5152 states and 7422 transitions. [2022-12-14 07:34:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 07:34:50,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:50,880 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] [2022-12-14 07:34:50,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 07:34:50,881 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash -300709537, now seen corresponding path program 1 times [2022-12-14 07:34:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347169421] [2022-12-14 07:34:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:50,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:50,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:50,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347169421] [2022-12-14 07:34:50,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347169421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:50,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:50,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:34:50,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867537808] [2022-12-14 07:34:50,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:50,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:34:50,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:34:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:34:50,910 INFO L87 Difference]: Start difference. First operand 5152 states and 7422 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:51,716 INFO L93 Difference]: Finished difference Result 8680 states and 12550 transitions. [2022-12-14 07:34:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:34:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2022-12-14 07:34:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:51,721 INFO L225 Difference]: With dead ends: 8680 [2022-12-14 07:34:51,721 INFO L226 Difference]: Without dead ends: 4896 [2022-12-14 07:34:51,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:34:51,724 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 107 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:51,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 272 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:34:51,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2022-12-14 07:34:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 4894. [2022-12-14 07:34:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 1.4402207234825262) internal successors, (7047), 4893 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 7047 transitions. [2022-12-14 07:34:52,444 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 7047 transitions. Word has length 58 [2022-12-14 07:34:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:52,444 INFO L495 AbstractCegarLoop]: Abstraction has 4894 states and 7047 transitions. [2022-12-14 07:34:52,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 7047 transitions. [2022-12-14 07:34:52,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 07:34:52,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:52,445 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] [2022-12-14 07:34:52,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 07:34:52,445 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:52,445 INFO L85 PathProgramCache]: Analyzing trace with hash 871143237, now seen corresponding path program 1 times [2022-12-14 07:34:52,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:52,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549494548] [2022-12-14 07:34:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:52,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:34:53,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:34:53,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549494548] [2022-12-14 07:34:53,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549494548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:53,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:53,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-12-14 07:34:53,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261808437] [2022-12-14 07:34:53,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:53,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:34:53,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:34:53,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:34:53,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:34:53,806 INFO L87 Difference]: Start difference. First operand 4894 states and 7047 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:57,209 INFO L93 Difference]: Finished difference Result 5453 states and 7828 transitions. [2022-12-14 07:34:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 07:34:57,210 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 59 [2022-12-14 07:34:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:57,214 INFO L225 Difference]: With dead ends: 5453 [2022-12-14 07:34:57,214 INFO L226 Difference]: Without dead ends: 5451 [2022-12-14 07:34:57,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=407, Invalid=1573, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 07:34:57,216 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 779 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 2441 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:57,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 2441 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:34:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2022-12-14 07:34:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4888. [2022-12-14 07:34:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 1.4405565786781256) internal successors, (7040), 4887 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 7040 transitions. [2022-12-14 07:34:57,938 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 7040 transitions. Word has length 59 [2022-12-14 07:34:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:57,939 INFO L495 AbstractCegarLoop]: Abstraction has 4888 states and 7040 transitions. [2022-12-14 07:34:57,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 7040 transitions. [2022-12-14 07:34:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 07:34:57,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:57,939 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] [2022-12-14 07:34:57,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 07:34:57,940 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:34:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash 192143237, now seen corresponding path program 1 times [2022-12-14 07:34:57,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:34:57,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978158911] [2022-12-14 07:34:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:57,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:34:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:00,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978158911] [2022-12-14 07:35:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978158911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:00,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-12-14 07:35:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233115031] [2022-12-14 07:35:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:00,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 07:35:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 07:35:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-12-14 07:35:00,408 INFO L87 Difference]: Start difference. First operand 4888 states and 7040 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:05,805 INFO L93 Difference]: Finished difference Result 5433 states and 7807 transitions. [2022-12-14 07:35:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 07:35:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 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 59 [2022-12-14 07:35:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:05,810 INFO L225 Difference]: With dead ends: 5433 [2022-12-14 07:35:05,810 INFO L226 Difference]: Without dead ends: 5431 [2022-12-14 07:35:05,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=478, Invalid=1972, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 07:35:05,811 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 762 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 3484 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 3492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:05,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 1950 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3484 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 07:35:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2022-12-14 07:35:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4884. [2022-12-14 07:35:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4884 states, 4883 states have (on average 1.4407126766332172) internal successors, (7035), 4883 states have internal predecessors, (7035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4884 states to 4884 states and 7035 transitions. [2022-12-14 07:35:06,545 INFO L78 Accepts]: Start accepts. Automaton has 4884 states and 7035 transitions. Word has length 59 [2022-12-14 07:35:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:06,545 INFO L495 AbstractCegarLoop]: Abstraction has 4884 states and 7035 transitions. [2022-12-14 07:35:06,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4884 states and 7035 transitions. [2022-12-14 07:35:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 07:35:06,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:06,546 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] [2022-12-14 07:35:06,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 07:35:06,546 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:06,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1007838117, now seen corresponding path program 1 times [2022-12-14 07:35:06,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:06,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871899186] [2022-12-14 07:35:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:06,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:07,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:07,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871899186] [2022-12-14 07:35:07,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871899186] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:07,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:07,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 07:35:07,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039880677] [2022-12-14 07:35:07,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:07,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 07:35:07,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:07,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 07:35:07,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-12-14 07:35:07,836 INFO L87 Difference]: Start difference. First operand 4884 states and 7035 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:11,485 INFO L93 Difference]: Finished difference Result 7747 states and 11155 transitions. [2022-12-14 07:35:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 07:35:11,486 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 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 59 [2022-12-14 07:35:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:11,492 INFO L225 Difference]: With dead ends: 7747 [2022-12-14 07:35:11,492 INFO L226 Difference]: Without dead ends: 7057 [2022-12-14 07:35:11,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 07:35:11,495 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 795 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 3072 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:11,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 3072 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 07:35:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7057 states. [2022-12-14 07:35:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7057 to 4874. [2022-12-14 07:35:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 1.4416170736712497) internal successors, (7025), 4873 states have internal predecessors, (7025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 7025 transitions. [2022-12-14 07:35:12,275 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 7025 transitions. Word has length 59 [2022-12-14 07:35:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:12,275 INFO L495 AbstractCegarLoop]: Abstraction has 4874 states and 7025 transitions. [2022-12-14 07:35:12,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 7025 transitions. [2022-12-14 07:35:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 07:35:12,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:12,276 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] [2022-12-14 07:35:12,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 07:35:12,276 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1683397477, now seen corresponding path program 1 times [2022-12-14 07:35:12,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:12,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047282147] [2022-12-14 07:35:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:12,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:14,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:14,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047282147] [2022-12-14 07:35:14,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047282147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:14,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:14,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-12-14 07:35:14,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515240016] [2022-12-14 07:35:14,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:14,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 07:35:14,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 07:35:14,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-12-14 07:35:14,418 INFO L87 Difference]: Start difference. First operand 4874 states and 7025 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:19,075 INFO L93 Difference]: Finished difference Result 5420 states and 7794 transitions. [2022-12-14 07:35:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 07:35:19,076 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 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 59 [2022-12-14 07:35:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:19,081 INFO L225 Difference]: With dead ends: 5420 [2022-12-14 07:35:19,081 INFO L226 Difference]: Without dead ends: 5418 [2022-12-14 07:35:19,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=447, Invalid=1809, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 07:35:19,082 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 677 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 3255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 3263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:19,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1704 Invalid, 3263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3255 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 07:35:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2022-12-14 07:35:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4874. [2022-12-14 07:35:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 1.4416170736712497) internal successors, (7025), 4873 states have internal predecessors, (7025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 7025 transitions. [2022-12-14 07:35:19,898 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 7025 transitions. Word has length 59 [2022-12-14 07:35:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:19,898 INFO L495 AbstractCegarLoop]: Abstraction has 4874 states and 7025 transitions. [2022-12-14 07:35:19,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 7025 transitions. [2022-12-14 07:35:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 07:35:19,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:19,899 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] [2022-12-14 07:35:19,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 07:35:19,899 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash -394205639, now seen corresponding path program 1 times [2022-12-14 07:35:19,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:19,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98428179] [2022-12-14 07:35:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:27,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:27,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98428179] [2022-12-14 07:35:27,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98428179] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:27,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:27,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-12-14 07:35:27,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394065816] [2022-12-14 07:35:27,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:27,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 07:35:27,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:27,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 07:35:27,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 07:35:27,487 INFO L87 Difference]: Start difference. First operand 4874 states and 7025 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:41,264 INFO L93 Difference]: Finished difference Result 5418 states and 7792 transitions. [2022-12-14 07:35:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 07:35:41,265 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 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 61 [2022-12-14 07:35:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:41,269 INFO L225 Difference]: With dead ends: 5418 [2022-12-14 07:35:41,270 INFO L226 Difference]: Without dead ends: 5416 [2022-12-14 07:35:41,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=971, Invalid=3451, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 07:35:41,271 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 790 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 4649 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 4650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:41,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 2457 Invalid, 4650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4649 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 07:35:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2022-12-14 07:35:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 4850. [2022-12-14 07:35:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4850 states, 4849 states have (on average 1.443390389771087) internal successors, (6999), 4849 states have internal predecessors, (6999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 6999 transitions. [2022-12-14 07:35:42,094 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 6999 transitions. Word has length 61 [2022-12-14 07:35:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:42,094 INFO L495 AbstractCegarLoop]: Abstraction has 4850 states and 6999 transitions. [2022-12-14 07:35:42,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 6999 transitions. [2022-12-14 07:35:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 07:35:42,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:42,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:42,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 07:35:42,095 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:42,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1204138079, now seen corresponding path program 1 times [2022-12-14 07:35:42,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:42,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720490314] [2022-12-14 07:35:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:42,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:42,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:42,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720490314] [2022-12-14 07:35:42,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720490314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:42,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:42,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:35:42,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332990271] [2022-12-14 07:35:42,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:42,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:35:42,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:42,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:35:42,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:42,153 INFO L87 Difference]: Start difference. First operand 4850 states and 6999 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:43,256 INFO L93 Difference]: Finished difference Result 8211 states and 11958 transitions. [2022-12-14 07:35:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:35:43,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2022-12-14 07:35:43,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:43,261 INFO L225 Difference]: With dead ends: 8211 [2022-12-14 07:35:43,261 INFO L226 Difference]: Without dead ends: 6145 [2022-12-14 07:35:43,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:43,263 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 79 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:43,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 330 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2022-12-14 07:35:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 5753. [2022-12-14 07:35:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 1.4426286509040334) internal successors, (8298), 5752 states have internal predecessors, (8298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 8298 transitions. [2022-12-14 07:35:44,229 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 8298 transitions. Word has length 64 [2022-12-14 07:35:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:44,230 INFO L495 AbstractCegarLoop]: Abstraction has 5753 states and 8298 transitions. [2022-12-14 07:35:44,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 8298 transitions. [2022-12-14 07:35:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 07:35:44,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:44,231 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:44,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 07:35:44,231 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1919564423, now seen corresponding path program 1 times [2022-12-14 07:35:44,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:44,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625899834] [2022-12-14 07:35:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:44,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:44,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:44,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625899834] [2022-12-14 07:35:44,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625899834] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:44,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:44,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:35:44,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762790403] [2022-12-14 07:35:44,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:44,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:35:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:35:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:44,293 INFO L87 Difference]: Start difference. First operand 5753 states and 8298 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:45,615 INFO L93 Difference]: Finished difference Result 10445 states and 15188 transitions. [2022-12-14 07:35:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:35:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2022-12-14 07:35:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:45,622 INFO L225 Difference]: With dead ends: 10445 [2022-12-14 07:35:45,623 INFO L226 Difference]: Without dead ends: 7491 [2022-12-14 07:35:45,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:45,625 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 74 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:45,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 312 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7491 states. [2022-12-14 07:35:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7491 to 6973. [2022-12-14 07:35:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6973 states, 6972 states have (on average 1.4399024670109009) internal successors, (10039), 6972 states have internal predecessors, (10039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6973 states to 6973 states and 10039 transitions. [2022-12-14 07:35:46,799 INFO L78 Accepts]: Start accepts. Automaton has 6973 states and 10039 transitions. Word has length 67 [2022-12-14 07:35:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:46,799 INFO L495 AbstractCegarLoop]: Abstraction has 6973 states and 10039 transitions. [2022-12-14 07:35:46,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 6973 states and 10039 transitions. [2022-12-14 07:35:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 07:35:46,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:46,800 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:46,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 07:35:46,800 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash 694670691, now seen corresponding path program 1 times [2022-12-14 07:35:46,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:46,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926105402] [2022-12-14 07:35:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:46,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:46,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:46,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926105402] [2022-12-14 07:35:46,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926105402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:46,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:46,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:35:46,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704376269] [2022-12-14 07:35:46,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:46,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:35:46,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:35:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:46,840 INFO L87 Difference]: Start difference. First operand 6973 states and 10039 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:48,931 INFO L93 Difference]: Finished difference Result 15466 states and 22234 transitions. [2022-12-14 07:35:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:35:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2022-12-14 07:35:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:48,941 INFO L225 Difference]: With dead ends: 15466 [2022-12-14 07:35:48,941 INFO L226 Difference]: Without dead ends: 11144 [2022-12-14 07:35:48,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:48,946 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 74 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:48,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 318 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11144 states. [2022-12-14 07:35:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11144 to 11142. [2022-12-14 07:35:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11142 states, 11141 states have (on average 1.426981419980253) internal successors, (15898), 11141 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11142 states to 11142 states and 15898 transitions. [2022-12-14 07:35:51,010 INFO L78 Accepts]: Start accepts. Automaton has 11142 states and 15898 transitions. Word has length 70 [2022-12-14 07:35:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:51,011 INFO L495 AbstractCegarLoop]: Abstraction has 11142 states and 15898 transitions. [2022-12-14 07:35:51,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11142 states and 15898 transitions. [2022-12-14 07:35:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 07:35:51,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:51,012 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:51,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 07:35:51,012 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1272491427, now seen corresponding path program 1 times [2022-12-14 07:35:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:51,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473536379] [2022-12-14 07:35:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:51,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:51,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473536379] [2022-12-14 07:35:51,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473536379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:51,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:51,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:35:51,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294381725] [2022-12-14 07:35:51,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:51,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:35:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:51,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:35:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:51,066 INFO L87 Difference]: Start difference. First operand 11142 states and 15898 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:53,954 INFO L93 Difference]: Finished difference Result 21550 states and 30945 transitions. [2022-12-14 07:35:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:35:53,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2022-12-14 07:35:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:53,969 INFO L225 Difference]: With dead ends: 21550 [2022-12-14 07:35:53,969 INFO L226 Difference]: Without dead ends: 14996 [2022-12-14 07:35:53,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:53,975 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 69 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:53,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 293 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:35:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14996 states. [2022-12-14 07:35:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14996 to 13856. [2022-12-14 07:35:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13856 states, 13855 states have (on average 1.4200649584987368) internal successors, (19675), 13855 states have internal predecessors, (19675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13856 states to 13856 states and 19675 transitions. [2022-12-14 07:35:56,675 INFO L78 Accepts]: Start accepts. Automaton has 13856 states and 19675 transitions. Word has length 70 [2022-12-14 07:35:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:56,675 INFO L495 AbstractCegarLoop]: Abstraction has 13856 states and 19675 transitions. [2022-12-14 07:35:56,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 13856 states and 19675 transitions. [2022-12-14 07:35:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 07:35:56,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:56,677 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:56,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 07:35:56,677 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:35:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:56,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1547887493, now seen corresponding path program 1 times [2022-12-14 07:35:56,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:35:56,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539519484] [2022-12-14 07:35:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:35:56,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:35:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:35:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:56,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:35:56,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539519484] [2022-12-14 07:35:56,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539519484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:56,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:56,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:35:56,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075763396] [2022-12-14 07:35:56,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:56,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:35:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:35:56,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:35:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:35:56,729 INFO L87 Difference]: Start difference. First operand 13856 states and 19675 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:36:00,304 INFO L93 Difference]: Finished difference Result 29688 states and 42309 transitions. [2022-12-14 07:36:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:36:00,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2022-12-14 07:36:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:36:00,326 INFO L225 Difference]: With dead ends: 29688 [2022-12-14 07:36:00,326 INFO L226 Difference]: Without dead ends: 19320 [2022-12-14 07:36:00,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:36:00,336 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 64 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:36:00,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 272 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:36:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19320 states. [2022-12-14 07:36:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19320 to 17846. [2022-12-14 07:36:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17846 states, 17845 states have (on average 1.4121042308769964) internal successors, (25199), 17845 states have internal predecessors, (25199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17846 states to 17846 states and 25199 transitions. [2022-12-14 07:36:03,878 INFO L78 Accepts]: Start accepts. Automaton has 17846 states and 25199 transitions. Word has length 73 [2022-12-14 07:36:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:36:03,878 INFO L495 AbstractCegarLoop]: Abstraction has 17846 states and 25199 transitions. [2022-12-14 07:36:03,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 17846 states and 25199 transitions. [2022-12-14 07:36:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:36:03,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:36:03,881 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:36:03,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 07:36:03,881 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:36:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:36:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash -909715689, now seen corresponding path program 1 times [2022-12-14 07:36:03,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:36:03,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501140157] [2022-12-14 07:36:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:36:03,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:36:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:36:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:36:03,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:36:03,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501140157] [2022-12-14 07:36:03,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501140157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:36:03,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:36:03,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:36:03,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472455141] [2022-12-14 07:36:03,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:36:03,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:36:03,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:36:03,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:36:03,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:36:03,998 INFO L87 Difference]: Start difference. First operand 17846 states and 25199 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:36:13,575 INFO L93 Difference]: Finished difference Result 63277 states and 88888 transitions. [2022-12-14 07:36:13,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:36:13,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 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 87 [2022-12-14 07:36:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:36:13,635 INFO L225 Difference]: With dead ends: 63277 [2022-12-14 07:36:13,635 INFO L226 Difference]: Without dead ends: 46465 [2022-12-14 07:36:13,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:36:13,654 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1160 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:36:13,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 286 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:36:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46465 states. [2022-12-14 07:36:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46465 to 29646. [2022-12-14 07:36:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29646 states, 29645 states have (on average 1.3835385393826953) internal successors, (41015), 29645 states have internal predecessors, (41015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29646 states to 29646 states and 41015 transitions. [2022-12-14 07:36:20,275 INFO L78 Accepts]: Start accepts. Automaton has 29646 states and 41015 transitions. Word has length 87 [2022-12-14 07:36:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:36:20,275 INFO L495 AbstractCegarLoop]: Abstraction has 29646 states and 41015 transitions. [2022-12-14 07:36:20,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 29646 states and 41015 transitions. [2022-12-14 07:36:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:36:20,279 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:36:20,279 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:36:20,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 07:36:20,279 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:36:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:36:20,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1875167620, now seen corresponding path program 1 times [2022-12-14 07:36:20,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:36:20,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685935779] [2022-12-14 07:36:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:36:20,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:36:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:36:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:36:21,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:36:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685935779] [2022-12-14 07:36:21,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685935779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:36:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631997153] [2022-12-14 07:36:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:36:21,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:36:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:36:21,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:36:21,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:36:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:36:21,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 07:36:21,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:36:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:36:23,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:36:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:36:54,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631997153] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:36:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1517902383] [2022-12-14 07:36:54,696 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-12-14 07:36:54,697 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:36:54,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:36:54,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:36:54,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:36:54,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:54,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:54,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:54,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:54,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:36:54,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 07:36:54,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:36:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:36:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:36:54,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 07:37:34,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:38:11,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '756329#(and (<= (+ |ULTIMATE.start_main_~node2__m2~1#1| 1) 0) (<= ~__return_19240~0 1) (<= 0 ~id3~0) (<= 1 ~__return_19240~0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~p4~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= ~__return_19141~0 1) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 1 ~__return_19141~0) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 1 ~r1~0) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= |ULTIMATE.start_main_~check__tmp~1#1| 1) (<= 0 ~mode3~0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~1#1| 1)) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= 0 ~__return_19398~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= (+ |ULTIMATE.start_main_~node4__m4~1#1| 1) 0) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~1#1| 1)) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= ~st4~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= ~__return_19398~0 1) (<= 0 |ULTIMATE.start_main_~check__tmp~1#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~1#1| 1) 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~1#1| 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-12-14 07:38:11,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:38:11,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:38:11,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 17] total 54 [2022-12-14 07:38:11,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706104506] [2022-12-14 07:38:11,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:38:11,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 07:38:11,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:38:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 07:38:11,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1482, Invalid=11174, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 07:38:11,240 INFO L87 Difference]: Start difference. First operand 29646 states and 41015 transitions. Second operand has 54 states, 54 states have (on average 4.703703703703703) internal successors, (254), 54 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:34,625 INFO L93 Difference]: Finished difference Result 157799 states and 216574 transitions. [2022-12-14 07:40:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-12-14 07:40:34,626 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.703703703703703) internal successors, (254), 54 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-12-14 07:40:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:34,840 INFO L225 Difference]: With dead ends: 157799 [2022-12-14 07:40:34,840 INFO L226 Difference]: Without dead ends: 128858 [2022-12-14 07:40:34,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 164 SyntacticMatches, 7 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38329 ImplicationChecksByTransitivity, 111.9s TimeCoverageRelationStatistics Valid=9675, Invalid=81831, Unknown=0, NotChecked=0, Total=91506 [2022-12-14 07:40:34,893 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 10598 mSDsluCounter, 3787 mSDsCounter, 0 mSdLazyCounter, 6062 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10598 SdHoareTripleChecker+Valid, 3933 SdHoareTripleChecker+Invalid, 6588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 6062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:34,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10598 Valid, 3933 Invalid, 6588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 6062 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-12-14 07:40:34,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128858 states. [2022-12-14 07:41:18,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128858 to 86337. [2022-12-14 07:41:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86337 states, 86336 states have (on average 1.355842290585619) internal successors, (117058), 86336 states have internal predecessors, (117058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86337 states to 86337 states and 117058 transitions. [2022-12-14 07:41:18,641 INFO L78 Accepts]: Start accepts. Automaton has 86337 states and 117058 transitions. Word has length 87 [2022-12-14 07:41:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:18,641 INFO L495 AbstractCegarLoop]: Abstraction has 86337 states and 117058 transitions. [2022-12-14 07:41:18,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.703703703703703) internal successors, (254), 54 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:41:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 86337 states and 117058 transitions. [2022-12-14 07:41:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:41:18,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:18,646 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:41:18,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:41:18,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:18,847 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:41:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash -288752425, now seen corresponding path program 1 times [2022-12-14 07:41:18,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:41:18,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653489330] [2022-12-14 07:41:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:18,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:41:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:41:19,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:41:19,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653489330] [2022-12-14 07:41:19,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653489330] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:41:19,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:41:19,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:41:19,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318318337] [2022-12-14 07:41:19,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:41:19,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:41:19,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:41:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:41:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:41:19,065 INFO L87 Difference]: Start difference. First operand 86337 states and 117058 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:42:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:42:35,878 INFO L93 Difference]: Finished difference Result 238049 states and 323597 transitions. [2022-12-14 07:42:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:42:35,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 6 states have internal predecessors, (86), 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 87 [2022-12-14 07:42:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:42:36,158 INFO L225 Difference]: With dead ends: 238049 [2022-12-14 07:42:36,158 INFO L226 Difference]: Without dead ends: 154729 [2022-12-14 07:42:36,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:42:36,231 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 795 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:42:36,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 271 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:42:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154729 states. [2022-12-14 07:43:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154729 to 123060. [2022-12-14 07:43:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123060 states, 123059 states have (on average 1.346004761943458) internal successors, (165638), 123059 states have internal predecessors, (165638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:43:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123060 states to 123060 states and 165638 transitions. [2022-12-14 07:43:39,198 INFO L78 Accepts]: Start accepts. Automaton has 123060 states and 165638 transitions. Word has length 87 [2022-12-14 07:43:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:43:39,198 INFO L495 AbstractCegarLoop]: Abstraction has 123060 states and 165638 transitions. [2022-12-14 07:43:39,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:43:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 123060 states and 165638 transitions. [2022-12-14 07:43:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:43:39,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:43:39,204 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:43:39,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 07:43:39,204 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:43:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:43:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1417255300, now seen corresponding path program 1 times [2022-12-14 07:43:39,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:43:39,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62017335] [2022-12-14 07:43:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:43:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:43:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:43:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:43:40,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:43:40,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62017335] [2022-12-14 07:43:40,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62017335] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:43:40,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663349240] [2022-12-14 07:43:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:43:40,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:43:40,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:43:40,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:43:40,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ffb56a0-7b17-4ec0-a53e-0c8ae706374e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:43:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:43:40,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-14 07:43:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:43:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:43:42,703 INFO L328 TraceCheckSpWp]: Computing backward predicates...