./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.BOUNDED-8.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur --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 afd688b49db4d2cf9e7e2109162780e9655a2ed2ed733e9c6c0c10bb8df3342c --- 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-38b53e6 [2022-11-26 00:18:06,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:18:06,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:18:06,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:18:06,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:18:06,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:18:06,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:18:06,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:18:06,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:18:07,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:18:07,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:18:07,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:18:07,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:18:07,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:18:07,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:18:07,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:18:07,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:18:07,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:18:07,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:18:07,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:18:07,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:18:07,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:18:07,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:18:07,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:18:07,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:18:07,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:18:07,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:18:07,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:18:07,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:18:07,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:18:07,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:18:07,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:18:07,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:18:07,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:18:07,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:18:07,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:18:07,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:18:07,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:18:07,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:18:07,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:18:07,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:18:07,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:18:07,093 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:18:07,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:18:07,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:18:07,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:18:07,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:18:07,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:18:07,095 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:18:07,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:18:07,096 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:18:07,096 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:18:07,097 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:18:07,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:18:07,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:18:07,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:18:07,098 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:18:07,098 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:18:07,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:18:07,099 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:18:07,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:18:07,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:18:07,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:18:07,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:18:07,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:18:07,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:18:07,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:18:07,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:18:07,101 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:18:07,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:18:07,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:18:07,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:18:07,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:18:07,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:18:07,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:07,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:18:07,103 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:18:07,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:18:07,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:18:07,104 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:18:07,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:18:07,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:18:07,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:18:07,105 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_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afd688b49db4d2cf9e7e2109162780e9655a2ed2ed733e9c6c0c10bb8df3342c [2022-11-26 00:18:07,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:18:07,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:18:07,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:18:07,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:18:07,457 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:18:07,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2022-11-26 00:18:10,534 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:18:10,839 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:18:10,851 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2022-11-26 00:18:10,867 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/data/56423f12f/e973d1f017514b1aa05a738f98c9997d/FLAG9dd7d8ddd [2022-11-26 00:18:10,920 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/data/56423f12f/e973d1f017514b1aa05a738f98c9997d [2022-11-26 00:18:10,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:18:10,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:18:10,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:10,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:18:10,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:18:10,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:10" (1/1) ... [2022-11-26 00:18:10,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c68cf49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:10, skipping insertion in model container [2022-11-26 00:18:10,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:10" (1/1) ... [2022-11-26 00:18:10,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:18:11,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:18:11,315 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_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2022-11-26 00:18:11,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:11,436 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:18:11,520 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_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2022-11-26 00:18:11,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:11,645 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:18:11,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11 WrapperNode [2022-11-26 00:18:11,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:11,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:11,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:18:11,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:18:11,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,726 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1359 [2022-11-26 00:18:11,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:11,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:18:11,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:18:11,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:18:11,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,771 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:18:11,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:18:11,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:18:11,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:18:11,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (1/1) ... [2022-11-26 00:18:11,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:11,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:11,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:18:11,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:18:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:18:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:18:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:18:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:18:12,064 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:18:12,066 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:18:13,128 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:18:13,850 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:18:13,851 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:18:13,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:13 BoogieIcfgContainer [2022-11-26 00:18:13,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:18:13,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:18:13,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:18:13,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:18:13,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:18:10" (1/3) ... [2022-11-26 00:18:13,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72af614a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:13, skipping insertion in model container [2022-11-26 00:18:13,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:11" (2/3) ... [2022-11-26 00:18:13,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72af614a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:13, skipping insertion in model container [2022-11-26 00:18:13,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:13" (3/3) ... [2022-11-26 00:18:13,863 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2022-11-26 00:18:13,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:18:13,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:18:13,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:18:13,943 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;@583b9bff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:18:13,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:18:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 275 states have (on average 1.5527272727272727) internal successors, (427), 276 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:13,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:18:13,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:13,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:13,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1169256777, now seen corresponding path program 1 times [2022-11-26 00:18:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:13,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612280877] [2022-11-26 00:18:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:13,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:15,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:15,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612280877] [2022-11-26 00:18:15,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612280877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:15,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:15,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438325874] [2022-11-26 00:18:15,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:15,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:15,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:15,286 INFO L87 Difference]: Start difference. First operand has 277 states, 275 states have (on average 1.5527272727272727) internal successors, (427), 276 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 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) [2022-11-26 00:18:15,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:15,613 INFO L93 Difference]: Finished difference Result 716 states and 1099 transitions. [2022-11-26 00:18:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 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 [2022-11-26 00:18:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:15,631 INFO L225 Difference]: With dead ends: 716 [2022-11-26 00:18:15,632 INFO L226 Difference]: Without dead ends: 448 [2022-11-26 00:18:15,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:15,646 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 693 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:15,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 685 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:18:15,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-26 00:18:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 446. [2022-11-26 00:18:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5056179775280898) internal successors, (670), 445 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 670 transitions. [2022-11-26 00:18:15,761 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 670 transitions. Word has length 54 [2022-11-26 00:18:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:15,762 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 670 transitions. [2022-11-26 00:18:15,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 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) [2022-11-26 00:18:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 670 transitions. [2022-11-26 00:18:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 00:18:15,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:15,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:15,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:18:15,766 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash 171490719, now seen corresponding path program 1 times [2022-11-26 00:18:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:15,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887344504] [2022-11-26 00:18:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:16,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:16,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887344504] [2022-11-26 00:18:16,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887344504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:16,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:16,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:16,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158560501] [2022-11-26 00:18:16,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:16,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:16,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:16,597 INFO L87 Difference]: Start difference. First operand 446 states and 670 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:16,813 INFO L93 Difference]: Finished difference Result 1149 states and 1724 transitions. [2022-11-26 00:18:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:16,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2022-11-26 00:18:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:16,818 INFO L225 Difference]: With dead ends: 1149 [2022-11-26 00:18:16,819 INFO L226 Difference]: Without dead ends: 731 [2022-11-26 00:18:16,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:16,828 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 664 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:16,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 653 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-11-26 00:18:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 729. [2022-11-26 00:18:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 1.4931318681318682) internal successors, (1087), 728 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1087 transitions. [2022-11-26 00:18:16,940 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1087 transitions. Word has length 63 [2022-11-26 00:18:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:16,941 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 1087 transitions. [2022-11-26 00:18:16,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1087 transitions. [2022-11-26 00:18:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:18:16,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:16,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:16,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:18:16,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash 250388161, now seen corresponding path program 1 times [2022-11-26 00:18:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:16,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390169281] [2022-11-26 00:18:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:16,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:17,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:17,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390169281] [2022-11-26 00:18:17,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390169281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:17,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:17,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:17,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483168261] [2022-11-26 00:18:17,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:17,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:17,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:17,800 INFO L87 Difference]: Start difference. First operand 729 states and 1087 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:18,109 INFO L93 Difference]: Finished difference Result 1867 states and 2775 transitions. [2022-11-26 00:18:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2022-11-26 00:18:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:18,116 INFO L225 Difference]: With dead ends: 1867 [2022-11-26 00:18:18,116 INFO L226 Difference]: Without dead ends: 1179 [2022-11-26 00:18:18,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:18,126 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 325 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:18,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 953 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-11-26 00:18:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1177. [2022-11-26 00:18:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 1.4744897959183674) internal successors, (1734), 1176 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1734 transitions. [2022-11-26 00:18:18,261 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1734 transitions. Word has length 72 [2022-11-26 00:18:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:18,261 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1734 transitions. [2022-11-26 00:18:18,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1734 transitions. [2022-11-26 00:18:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-26 00:18:18,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:18,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:18,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:18:18,268 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1537179912, now seen corresponding path program 1 times [2022-11-26 00:18:18,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181084808] [2022-11-26 00:18:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:18,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:19,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:19,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181084808] [2022-11-26 00:18:19,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181084808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:19,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:19,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:19,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816381549] [2022-11-26 00:18:19,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:19,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:19,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:19,192 INFO L87 Difference]: Start difference. First operand 1177 states and 1734 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:19,570 INFO L93 Difference]: Finished difference Result 2962 states and 4334 transitions. [2022-11-26 00:18:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2022-11-26 00:18:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:19,578 INFO L225 Difference]: With dead ends: 2962 [2022-11-26 00:18:19,578 INFO L226 Difference]: Without dead ends: 1839 [2022-11-26 00:18:19,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:19,581 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 319 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:19,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 915 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-11-26 00:18:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1837. [2022-11-26 00:18:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 1.4449891067538125) internal successors, (2653), 1836 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 2653 transitions. [2022-11-26 00:18:19,903 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 2653 transitions. Word has length 81 [2022-11-26 00:18:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:19,904 INFO L495 AbstractCegarLoop]: Abstraction has 1837 states and 2653 transitions. [2022-11-26 00:18:19,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 2653 transitions. [2022-11-26 00:18:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-26 00:18:19,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:19,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:19,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:18:19,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash 896004859, now seen corresponding path program 1 times [2022-11-26 00:18:19,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:19,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936449085] [2022-11-26 00:18:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:19,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:20,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:20,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936449085] [2022-11-26 00:18:20,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936449085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:20,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:20,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:18:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667976497] [2022-11-26 00:18:20,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:20,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:18:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:20,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:18:20,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:18:20,326 INFO L87 Difference]: Start difference. First operand 1837 states and 2653 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:22,163 INFO L93 Difference]: Finished difference Result 7760 states and 11079 transitions. [2022-11-26 00:18:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:18:22,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 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 90 [2022-11-26 00:18:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:22,185 INFO L225 Difference]: With dead ends: 7760 [2022-11-26 00:18:22,185 INFO L226 Difference]: Without dead ends: 5971 [2022-11-26 00:18:22,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:18:22,192 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 1564 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:22,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1564 Valid, 1894 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:18:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2022-11-26 00:18:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5965. [2022-11-26 00:18:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5965 states, 5964 states have (on average 1.4183433936955063) internal successors, (8459), 5964 states have internal predecessors, (8459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5965 states to 5965 states and 8459 transitions. [2022-11-26 00:18:23,370 INFO L78 Accepts]: Start accepts. Automaton has 5965 states and 8459 transitions. Word has length 90 [2022-11-26 00:18:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:23,371 INFO L495 AbstractCegarLoop]: Abstraction has 5965 states and 8459 transitions. [2022-11-26 00:18:23,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 5965 states and 8459 transitions. [2022-11-26 00:18:23,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 00:18:23,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:23,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:23,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:18:23,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1887846199, now seen corresponding path program 1 times [2022-11-26 00:18:23,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:23,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302377355] [2022-11-26 00:18:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:23,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:23,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:23,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302377355] [2022-11-26 00:18:23,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302377355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:23,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:23,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:23,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919457530] [2022-11-26 00:18:23,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:23,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:23,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:23,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:23,523 INFO L87 Difference]: Start difference. First operand 5965 states and 8459 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:25,505 INFO L93 Difference]: Finished difference Result 14105 states and 19936 transitions. [2022-11-26 00:18:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:25,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 92 [2022-11-26 00:18:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:25,539 INFO L225 Difference]: With dead ends: 14105 [2022-11-26 00:18:25,540 INFO L226 Difference]: Without dead ends: 9879 [2022-11-26 00:18:25,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:25,548 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 324 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:25,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 954 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9879 states. [2022-11-26 00:18:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9879 to 9877. [2022-11-26 00:18:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9877 states, 9876 states have (on average 1.3992507087889834) internal successors, (13819), 9876 states have internal predecessors, (13819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9877 states to 9877 states and 13819 transitions. [2022-11-26 00:18:27,495 INFO L78 Accepts]: Start accepts. Automaton has 9877 states and 13819 transitions. Word has length 92 [2022-11-26 00:18:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:27,496 INFO L495 AbstractCegarLoop]: Abstraction has 9877 states and 13819 transitions. [2022-11-26 00:18:27,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 9877 states and 13819 transitions. [2022-11-26 00:18:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-26 00:18:27,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:27,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:27,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:18:27,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash -288773250, now seen corresponding path program 1 times [2022-11-26 00:18:27,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:27,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236761496] [2022-11-26 00:18:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:27,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:27,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:27,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236761496] [2022-11-26 00:18:27,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236761496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:27,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:27,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966692218] [2022-11-26 00:18:27,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:27,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:27,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:27,671 INFO L87 Difference]: Start difference. First operand 9877 states and 13819 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:29,868 INFO L93 Difference]: Finished difference Result 20005 states and 27861 transitions. [2022-11-26 00:18:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:29,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 94 [2022-11-26 00:18:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:29,917 INFO L225 Difference]: With dead ends: 20005 [2022-11-26 00:18:29,917 INFO L226 Difference]: Without dead ends: 14799 [2022-11-26 00:18:29,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:29,927 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 284 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:29,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 989 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14799 states. [2022-11-26 00:18:32,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14799 to 14797. [2022-11-26 00:18:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14797 states, 14796 states have (on average 1.378683427953501) internal successors, (20399), 14796 states have internal predecessors, (20399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14797 states to 14797 states and 20399 transitions. [2022-11-26 00:18:32,295 INFO L78 Accepts]: Start accepts. Automaton has 14797 states and 20399 transitions. Word has length 94 [2022-11-26 00:18:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:32,296 INFO L495 AbstractCegarLoop]: Abstraction has 14797 states and 20399 transitions. [2022-11-26 00:18:32,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14797 states and 20399 transitions. [2022-11-26 00:18:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-26 00:18:32,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:32,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:32,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:18:32,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1958779120, now seen corresponding path program 1 times [2022-11-26 00:18:32,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:32,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200799222] [2022-11-26 00:18:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:32,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:32,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200799222] [2022-11-26 00:18:32,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200799222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:32,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:32,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:32,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643401084] [2022-11-26 00:18:32,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:32,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:32,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:32,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:32,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:32,457 INFO L87 Difference]: Start difference. First operand 14797 states and 20399 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:35,163 INFO L93 Difference]: Finished difference Result 24131 states and 32987 transitions. [2022-11-26 00:18:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:35,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 94 [2022-11-26 00:18:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:35,209 INFO L225 Difference]: With dead ends: 24131 [2022-11-26 00:18:35,209 INFO L226 Difference]: Without dead ends: 19377 [2022-11-26 00:18:35,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:35,221 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 250 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:35,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 980 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19377 states. [2022-11-26 00:18:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19377 to 19375. [2022-11-26 00:18:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19375 states, 19374 states have (on average 1.3548570248787035) internal successors, (26249), 19374 states have internal predecessors, (26249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19375 states to 19375 states and 26249 transitions. [2022-11-26 00:18:37,952 INFO L78 Accepts]: Start accepts. Automaton has 19375 states and 26249 transitions. Word has length 94 [2022-11-26 00:18:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:37,953 INFO L495 AbstractCegarLoop]: Abstraction has 19375 states and 26249 transitions. [2022-11-26 00:18:37,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 19375 states and 26249 transitions. [2022-11-26 00:18:38,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:18:38,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:38,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:38,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:18:38,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:38,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1481212992, now seen corresponding path program 1 times [2022-11-26 00:18:38,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:38,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244519692] [2022-11-26 00:18:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:38,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:38,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:38,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244519692] [2022-11-26 00:18:38,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244519692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:38,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:38,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199551084] [2022-11-26 00:18:38,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:38,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:38,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:38,578 INFO L87 Difference]: Start difference. First operand 19375 states and 26249 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:43,011 INFO L93 Difference]: Finished difference Result 48042 states and 65323 transitions. [2022-11-26 00:18:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:43,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-26 00:18:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:43,090 INFO L225 Difference]: With dead ends: 48042 [2022-11-26 00:18:43,090 INFO L226 Difference]: Without dead ends: 28677 [2022-11-26 00:18:43,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:43,113 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 784 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:43,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 637 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:18:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28677 states. [2022-11-26 00:18:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28677 to 28675. [2022-11-26 00:18:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28675 states, 28674 states have (on average 1.3500732370788868) internal successors, (38712), 28674 states have internal predecessors, (38712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28675 states to 28675 states and 38712 transitions. [2022-11-26 00:18:46,130 INFO L78 Accepts]: Start accepts. Automaton has 28675 states and 38712 transitions. Word has length 96 [2022-11-26 00:18:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:46,131 INFO L495 AbstractCegarLoop]: Abstraction has 28675 states and 38712 transitions. [2022-11-26 00:18:46,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 28675 states and 38712 transitions. [2022-11-26 00:18:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:18:46,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:46,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:46,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:18:46,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash 239742902, now seen corresponding path program 1 times [2022-11-26 00:18:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:46,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652047051] [2022-11-26 00:18:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:46,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652047051] [2022-11-26 00:18:46,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652047051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:46,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:46,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:46,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689679290] [2022-11-26 00:18:46,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:46,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:46,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:46,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:46,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:46,358 INFO L87 Difference]: Start difference. First operand 28675 states and 38712 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:48,979 INFO L93 Difference]: Finished difference Result 36547 states and 49418 transitions. [2022-11-26 00:18:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-26 00:18:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:49,008 INFO L225 Difference]: With dead ends: 36547 [2022-11-26 00:18:49,008 INFO L226 Difference]: Without dead ends: 12647 [2022-11-26 00:18:49,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:49,046 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 171 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:49,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 580 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12647 states. [2022-11-26 00:18:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12647 to 12645. [2022-11-26 00:18:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12645 states, 12644 states have (on average 1.3379468522619424) internal successors, (16917), 12644 states have internal predecessors, (16917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12645 states to 12645 states and 16917 transitions. [2022-11-26 00:18:50,602 INFO L78 Accepts]: Start accepts. Automaton has 12645 states and 16917 transitions. Word has length 96 [2022-11-26 00:18:50,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:50,606 INFO L495 AbstractCegarLoop]: Abstraction has 12645 states and 16917 transitions. [2022-11-26 00:18:50,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 12645 states and 16917 transitions. [2022-11-26 00:18:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:18:50,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:50,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:50,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:18:50,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:50,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash 4390739, now seen corresponding path program 1 times [2022-11-26 00:18:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:50,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992269663] [2022-11-26 00:18:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:50,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:50,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:50,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992269663] [2022-11-26 00:18:50,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992269663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:50,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:50,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:50,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233777576] [2022-11-26 00:18:50,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:50,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:50,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:50,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:50,854 INFO L87 Difference]: Start difference. First operand 12645 states and 16917 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:51,678 INFO L93 Difference]: Finished difference Result 17645 states and 23627 transitions. [2022-11-26 00:18:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:51,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-26 00:18:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:51,690 INFO L225 Difference]: With dead ends: 17645 [2022-11-26 00:18:51,690 INFO L226 Difference]: Without dead ends: 6425 [2022-11-26 00:18:51,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:51,703 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 121 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:51,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 545 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6425 states. [2022-11-26 00:18:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6425 to 6423. [2022-11-26 00:18:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6423 states, 6422 states have (on average 1.315945188414824) internal successors, (8451), 6422 states have internal predecessors, (8451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6423 states to 6423 states and 8451 transitions. [2022-11-26 00:18:52,484 INFO L78 Accepts]: Start accepts. Automaton has 6423 states and 8451 transitions. Word has length 96 [2022-11-26 00:18:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:52,485 INFO L495 AbstractCegarLoop]: Abstraction has 6423 states and 8451 transitions. [2022-11-26 00:18:52,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 6423 states and 8451 transitions. [2022-11-26 00:18:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:18:52,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:52,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:52,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:18:52,494 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:52,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:52,494 INFO L85 PathProgramCache]: Analyzing trace with hash -124345890, now seen corresponding path program 1 times [2022-11-26 00:18:52,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:52,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771118419] [2022-11-26 00:18:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:52,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:52,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:52,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771118419] [2022-11-26 00:18:52,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771118419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:52,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:52,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:52,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735746042] [2022-11-26 00:18:52,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:52,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:52,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:52,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:52,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:52,647 INFO L87 Difference]: Start difference. First operand 6423 states and 8451 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:53,183 INFO L93 Difference]: Finished difference Result 8671 states and 11405 transitions. [2022-11-26 00:18:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:53,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-26 00:18:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:53,188 INFO L225 Difference]: With dead ends: 8671 [2022-11-26 00:18:53,188 INFO L226 Difference]: Without dead ends: 3329 [2022-11-26 00:18:53,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:53,194 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 71 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:53,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 510 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2022-11-26 00:18:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 3327. [2022-11-26 00:18:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 1.2907396271797955) internal successors, (4293), 3326 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 4293 transitions. [2022-11-26 00:18:53,563 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 4293 transitions. Word has length 96 [2022-11-26 00:18:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:53,563 INFO L495 AbstractCegarLoop]: Abstraction has 3327 states and 4293 transitions. [2022-11-26 00:18:53,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 4293 transitions. [2022-11-26 00:18:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:18:53,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:53,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:53,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:18:53,567 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:53,568 INFO L85 PathProgramCache]: Analyzing trace with hash -521806771, now seen corresponding path program 1 times [2022-11-26 00:18:53,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:53,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53067377] [2022-11-26 00:18:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:53,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:53,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53067377] [2022-11-26 00:18:53,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53067377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:53,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:53,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:53,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341963876] [2022-11-26 00:18:53,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:53,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:18:53,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:53,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:18:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:53,731 INFO L87 Difference]: Start difference. First operand 3327 states and 4293 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:54,125 INFO L93 Difference]: Finished difference Result 4326 states and 5570 transitions. [2022-11-26 00:18:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:54,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-26 00:18:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:54,129 INFO L225 Difference]: With dead ends: 4326 [2022-11-26 00:18:54,129 INFO L226 Difference]: Without dead ends: 1796 [2022-11-26 00:18:54,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:18:54,133 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 21 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:54,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 475 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-11-26 00:18:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1794. [2022-11-26 00:18:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 1.2598996095928612) internal successors, (2259), 1793 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2259 transitions. [2022-11-26 00:18:54,385 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2259 transitions. Word has length 96 [2022-11-26 00:18:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:54,386 INFO L495 AbstractCegarLoop]: Abstraction has 1794 states and 2259 transitions. [2022-11-26 00:18:54,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2259 transitions. [2022-11-26 00:18:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:18:54,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:54,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:54,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:18:54,390 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:54,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1174371126, now seen corresponding path program 1 times [2022-11-26 00:18:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:54,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003160965] [2022-11-26 00:18:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:54,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:55,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:55,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003160965] [2022-11-26 00:18:55,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003160965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:55,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:55,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:18:55,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340461127] [2022-11-26 00:18:55,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:55,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:18:55,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:18:55,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:18:55,059 INFO L87 Difference]: Start difference. First operand 1794 states and 2259 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:56,021 INFO L93 Difference]: Finished difference Result 4394 states and 5470 transitions. [2022-11-26 00:18:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:18:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 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 96 [2022-11-26 00:18:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:56,026 INFO L225 Difference]: With dead ends: 4394 [2022-11-26 00:18:56,026 INFO L226 Difference]: Without dead ends: 2761 [2022-11-26 00:18:56,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:18:56,030 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 476 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:56,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 335 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:18:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2022-11-26 00:18:56,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2547. [2022-11-26 00:18:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 1.2462686567164178) internal successors, (3173), 2546 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 3173 transitions. [2022-11-26 00:18:56,365 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 3173 transitions. Word has length 96 [2022-11-26 00:18:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:56,365 INFO L495 AbstractCegarLoop]: Abstraction has 2547 states and 3173 transitions. [2022-11-26 00:18:56,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 3173 transitions. [2022-11-26 00:18:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:18:56,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:56,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:56,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:18:56,369 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1908976982, now seen corresponding path program 1 times [2022-11-26 00:18:56,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:56,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548402071] [2022-11-26 00:18:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:56,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:18:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:58,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:58,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548402071] [2022-11-26 00:18:58,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548402071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:58,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:58,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:18:58,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151349574] [2022-11-26 00:18:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:18:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:18:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:18:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:18:58,154 INFO L87 Difference]: Start difference. First operand 2547 states and 3173 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:59,205 INFO L93 Difference]: Finished difference Result 3583 states and 4487 transitions. [2022-11-26 00:18:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:18:59,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 96 [2022-11-26 00:18:59,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:59,211 INFO L225 Difference]: With dead ends: 3583 [2022-11-26 00:18:59,212 INFO L226 Difference]: Without dead ends: 3581 [2022-11-26 00:18:59,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:18:59,216 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 219 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:59,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1113 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:18:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2022-11-26 00:18:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 3361. [2022-11-26 00:18:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 1.263095238095238) internal successors, (4244), 3360 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 4244 transitions. [2022-11-26 00:18:59,921 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 4244 transitions. Word has length 96 [2022-11-26 00:18:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:59,921 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 4244 transitions. [2022-11-26 00:18:59,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 4244 transitions. [2022-11-26 00:18:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:18:59,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:59,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:59,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:18:59,926 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:59,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1870969347, now seen corresponding path program 1 times [2022-11-26 00:18:59,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:18:59,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747505712] [2022-11-26 00:18:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:05,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:05,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747505712] [2022-11-26 00:19:05,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747505712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:05,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138683929] [2022-11-26 00:19:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:05,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:05,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:05,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:05,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:19:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:05,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:19:05,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:19:12,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:12,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138683929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:12,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:12,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [21] total 39 [2022-11-26 00:19:12,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917571554] [2022-11-26 00:19:12,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:12,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:19:12,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:19:12,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1413, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:19:12,124 INFO L87 Difference]: Start difference. First operand 3361 states and 4244 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:16,468 INFO L93 Difference]: Finished difference Result 6939 states and 8716 transitions. [2022-11-26 00:19:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:19:16,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 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 107 [2022-11-26 00:19:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:16,472 INFO L225 Difference]: With dead ends: 6939 [2022-11-26 00:19:16,473 INFO L226 Difference]: Without dead ends: 3595 [2022-11-26 00:19:16,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:19:16,477 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 881 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:16,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 1655 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:19:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2022-11-26 00:19:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 3272. [2022-11-26 00:19:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3271 states have (on average 1.2479364108835218) internal successors, (4082), 3271 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 4082 transitions. [2022-11-26 00:19:17,177 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 4082 transitions. Word has length 107 [2022-11-26 00:19:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:17,178 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 4082 transitions. [2022-11-26 00:19:17,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 4082 transitions. [2022-11-26 00:19:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:19:17,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:17,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:17,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:17,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:19:17,382 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1080794073, now seen corresponding path program 1 times [2022-11-26 00:19:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:17,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592285442] [2022-11-26 00:19:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:17,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:19:18,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:18,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592285442] [2022-11-26 00:19:18,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592285442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:18,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:18,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:19:18,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445608207] [2022-11-26 00:19:18,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:18,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:19:18,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:18,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:19:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:19:18,076 INFO L87 Difference]: Start difference. First operand 3272 states and 4082 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:19,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:19,828 INFO L93 Difference]: Finished difference Result 8908 states and 11246 transitions. [2022-11-26 00:19:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:19:19,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 5 states have internal predecessors, (101), 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 107 [2022-11-26 00:19:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:19,835 INFO L225 Difference]: With dead ends: 8908 [2022-11-26 00:19:19,835 INFO L226 Difference]: Without dead ends: 5888 [2022-11-26 00:19:19,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:19:19,840 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 910 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:19,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 392 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:19:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5888 states. [2022-11-26 00:19:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5888 to 4685. [2022-11-26 00:19:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 1.2350555081127241) internal successors, (5785), 4684 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 5785 transitions. [2022-11-26 00:19:20,667 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 5785 transitions. Word has length 107 [2022-11-26 00:19:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:20,667 INFO L495 AbstractCegarLoop]: Abstraction has 4685 states and 5785 transitions. [2022-11-26 00:19:20,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:20,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 5785 transitions. [2022-11-26 00:19:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:19:20,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:20,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:20,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:19:20,672 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:20,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1171174905, now seen corresponding path program 1 times [2022-11-26 00:19:20,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:20,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196307885] [2022-11-26 00:19:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:20,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:23,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:23,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196307885] [2022-11-26 00:19:23,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196307885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:23,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909212972] [2022-11-26 00:19:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:23,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:23,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:23,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:23,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:19:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:23,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-26 00:19:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:19:29,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:29,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909212972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:29,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:29,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [14] total 31 [2022-11-26 00:19:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011955787] [2022-11-26 00:19:29,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:29,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:19:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:19:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:19:29,287 INFO L87 Difference]: Start difference. First operand 4685 states and 5785 transitions. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:33,517 INFO L93 Difference]: Finished difference Result 7447 states and 9182 transitions. [2022-11-26 00:19:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:19:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 18 states have internal predecessors, (101), 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 107 [2022-11-26 00:19:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:33,523 INFO L225 Difference]: With dead ends: 7447 [2022-11-26 00:19:33,523 INFO L226 Difference]: Without dead ends: 5043 [2022-11-26 00:19:33,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:19:33,527 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 225 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:33,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1438 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:19:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2022-11-26 00:19:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 4841. [2022-11-26 00:19:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 4840 states have (on average 1.230785123966942) internal successors, (5957), 4840 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 5957 transitions. [2022-11-26 00:19:34,436 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 5957 transitions. Word has length 107 [2022-11-26 00:19:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:34,437 INFO L495 AbstractCegarLoop]: Abstraction has 4841 states and 5957 transitions. [2022-11-26 00:19:34,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 5957 transitions. [2022-11-26 00:19:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:19:34,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:34,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:34,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:19:34,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:19:34,641 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1200504952, now seen corresponding path program 1 times [2022-11-26 00:19:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:34,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583774866] [2022-11-26 00:19:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:19:35,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:35,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583774866] [2022-11-26 00:19:35,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583774866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:35,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:35,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:19:35,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672498834] [2022-11-26 00:19:35,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:35,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:19:35,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:19:35,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:19:35,580 INFO L87 Difference]: Start difference. First operand 4841 states and 5957 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:37,709 INFO L93 Difference]: Finished difference Result 11828 states and 14681 transitions. [2022-11-26 00:19:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:19:37,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 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 107 [2022-11-26 00:19:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:37,718 INFO L225 Difference]: With dead ends: 11828 [2022-11-26 00:19:37,718 INFO L226 Difference]: Without dead ends: 7462 [2022-11-26 00:19:37,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:19:37,724 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 574 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:37,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 385 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:19:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2022-11-26 00:19:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 6508. [2022-11-26 00:19:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6508 states, 6507 states have (on average 1.2203780544029508) internal successors, (7941), 6507 states have internal predecessors, (7941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6508 states to 6508 states and 7941 transitions. [2022-11-26 00:19:39,083 INFO L78 Accepts]: Start accepts. Automaton has 6508 states and 7941 transitions. Word has length 107 [2022-11-26 00:19:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:39,083 INFO L495 AbstractCegarLoop]: Abstraction has 6508 states and 7941 transitions. [2022-11-26 00:19:39,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 6508 states and 7941 transitions. [2022-11-26 00:19:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:19:39,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:39,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:39,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:19:39,089 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1077992893, now seen corresponding path program 1 times [2022-11-26 00:19:39,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:39,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316543854] [2022-11-26 00:19:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:43,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316543854] [2022-11-26 00:19:43,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316543854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518893701] [2022-11-26 00:19:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:43,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:43,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:19:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:43,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-26 00:19:43,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:19:47,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:47,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518893701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:47,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:47,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19] total 36 [2022-11-26 00:19:47,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915933288] [2022-11-26 00:19:47,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:47,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:19:47,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:19:47,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:19:47,992 INFO L87 Difference]: Start difference. First operand 6508 states and 7941 transitions. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:51,500 INFO L93 Difference]: Finished difference Result 9095 states and 11061 transitions. [2022-11-26 00:19:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:19:51,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 18 states have internal predecessors, (101), 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 107 [2022-11-26 00:19:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:51,508 INFO L225 Difference]: With dead ends: 9095 [2022-11-26 00:19:51,508 INFO L226 Difference]: Without dead ends: 6771 [2022-11-26 00:19:51,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:19:51,513 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 195 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:51,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 994 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:19:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2022-11-26 00:19:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 6639. [2022-11-26 00:19:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 1.2178366978005424) internal successors, (8084), 6638 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 8084 transitions. [2022-11-26 00:19:52,955 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 8084 transitions. Word has length 107 [2022-11-26 00:19:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:52,956 INFO L495 AbstractCegarLoop]: Abstraction has 6639 states and 8084 transitions. [2022-11-26 00:19:52,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 18 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 8084 transitions. [2022-11-26 00:19:52,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:19:52,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:52,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:52,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:53,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-26 00:19:53,172 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1851767833, now seen corresponding path program 1 times [2022-11-26 00:19:53,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:53,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576411341] [2022-11-26 00:19:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:53,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:19:53,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:53,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576411341] [2022-11-26 00:19:53,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576411341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:53,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:53,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:19:53,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86224497] [2022-11-26 00:19:53,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:53,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:19:53,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:19:53,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:19:53,925 INFO L87 Difference]: Start difference. First operand 6639 states and 8084 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:56,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:56,311 INFO L93 Difference]: Finished difference Result 9448 states and 11494 transitions. [2022-11-26 00:19:56,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:19:56,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 6 states have internal predecessors, (101), 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 107 [2022-11-26 00:19:56,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:56,319 INFO L225 Difference]: With dead ends: 9448 [2022-11-26 00:19:56,319 INFO L226 Difference]: Without dead ends: 6910 [2022-11-26 00:19:56,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:19:56,323 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 158 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:56,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 734 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:19:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6910 states. [2022-11-26 00:19:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6910 to 6718. [2022-11-26 00:19:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 6717 states have (on average 1.214976924222123) internal successors, (8161), 6717 states have internal predecessors, (8161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 8161 transitions. [2022-11-26 00:19:57,989 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 8161 transitions. Word has length 107 [2022-11-26 00:19:57,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:57,990 INFO L495 AbstractCegarLoop]: Abstraction has 6718 states and 8161 transitions. [2022-11-26 00:19:57,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 8161 transitions. [2022-11-26 00:19:57,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:19:57,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:57,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:57,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 00:19:57,997 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:57,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:57,997 INFO L85 PathProgramCache]: Analyzing trace with hash -153064094, now seen corresponding path program 1 times [2022-11-26 00:19:57,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:57,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815745330] [2022-11-26 00:19:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:57,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:19:58,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815745330] [2022-11-26 00:19:58,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815745330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:58,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:19:58,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:19:58,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15433516] [2022-11-26 00:19:58,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:58,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:19:58,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:19:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:19:58,258 INFO L87 Difference]: Start difference. First operand 6718 states and 8161 transitions. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:01,868 INFO L93 Difference]: Finished difference Result 17064 states and 20780 transitions. [2022-11-26 00:20:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:20:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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 107 [2022-11-26 00:20:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:01,885 INFO L225 Difference]: With dead ends: 17064 [2022-11-26 00:20:01,885 INFO L226 Difference]: Without dead ends: 11003 [2022-11-26 00:20:01,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:20:01,895 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 846 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:01,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 503 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:20:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11003 states. [2022-11-26 00:20:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11003 to 8386. [2022-11-26 00:20:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8386 states, 8385 states have (on average 1.190339892665474) internal successors, (9981), 8385 states have internal predecessors, (9981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8386 states to 8386 states and 9981 transitions. [2022-11-26 00:20:04,243 INFO L78 Accepts]: Start accepts. Automaton has 8386 states and 9981 transitions. Word has length 107 [2022-11-26 00:20:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:04,243 INFO L495 AbstractCegarLoop]: Abstraction has 8386 states and 9981 transitions. [2022-11-26 00:20:04,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8386 states and 9981 transitions. [2022-11-26 00:20:04,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:20:04,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:04,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:04,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:20:04,251 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1982398919, now seen corresponding path program 1 times [2022-11-26 00:20:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:04,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664448127] [2022-11-26 00:20:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:04,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:20:08,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:08,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664448127] [2022-11-26 00:20:08,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664448127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:20:08,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464543042] [2022-11-26 00:20:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:08,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:20:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:20:08,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:20:08,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:20:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:08,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-26 00:20:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:20:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:20:13,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:20:13,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464543042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:20:13,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:20:13,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [24] total 39 [2022-11-26 00:20:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728449418] [2022-11-26 00:20:13,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:20:13,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:20:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:13,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:20:13,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:20:13,542 INFO L87 Difference]: Start difference. First operand 8386 states and 9981 transitions. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:17,511 INFO L93 Difference]: Finished difference Result 10523 states and 12497 transitions. [2022-11-26 00:20:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:20:17,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 16 states have internal predecessors, (101), 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 107 [2022-11-26 00:20:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:17,521 INFO L225 Difference]: With dead ends: 10523 [2022-11-26 00:20:17,522 INFO L226 Difference]: Without dead ends: 8084 [2022-11-26 00:20:17,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:20:17,527 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 187 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:17,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 915 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:20:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2022-11-26 00:20:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 7991. [2022-11-26 00:20:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7991 states, 7990 states have (on average 1.188360450563204) internal successors, (9495), 7990 states have internal predecessors, (9495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7991 states to 7991 states and 9495 transitions. [2022-11-26 00:20:19,440 INFO L78 Accepts]: Start accepts. Automaton has 7991 states and 9495 transitions. Word has length 107 [2022-11-26 00:20:19,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:19,441 INFO L495 AbstractCegarLoop]: Abstraction has 7991 states and 9495 transitions. [2022-11-26 00:20:19,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 7991 states and 9495 transitions. [2022-11-26 00:20:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-26 00:20:19,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:19,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:19,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:20:19,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 00:20:19,646 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1477724762, now seen corresponding path program 1 times [2022-11-26 00:20:19,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:19,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933544296] [2022-11-26 00:20:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:19,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:20:19,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:19,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933544296] [2022-11-26 00:20:19,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933544296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:20:19,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:20:19,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:20:19,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334495036] [2022-11-26 00:20:19,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:20:19,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:20:19,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:19,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:20:19,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:20:19,709 INFO L87 Difference]: Start difference. First operand 7991 states and 9495 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:22,065 INFO L93 Difference]: Finished difference Result 13380 states and 16043 transitions. [2022-11-26 00:20:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:20:22,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 108 [2022-11-26 00:20:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:22,075 INFO L225 Difference]: With dead ends: 13380 [2022-11-26 00:20:22,075 INFO L226 Difference]: Without dead ends: 8545 [2022-11-26 00:20:22,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:20:22,082 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 190 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:22,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 248 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:20:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8545 states. [2022-11-26 00:20:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8545 to 7666. [2022-11-26 00:20:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 7665 states have (on average 1.1759947814742335) internal successors, (9014), 7665 states have internal predecessors, (9014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:23,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 9014 transitions. [2022-11-26 00:20:23,730 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 9014 transitions. Word has length 108 [2022-11-26 00:20:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:23,730 INFO L495 AbstractCegarLoop]: Abstraction has 7666 states and 9014 transitions. [2022-11-26 00:20:23,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 9014 transitions. [2022-11-26 00:20:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-26 00:20:23,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:23,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:23,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-26 00:20:23,736 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash 785133850, now seen corresponding path program 1 times [2022-11-26 00:20:23,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:23,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200276713] [2022-11-26 00:20:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:23,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:20:24,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200276713] [2022-11-26 00:20:24,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200276713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:20:24,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:20:24,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:20:24,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830278780] [2022-11-26 00:20:24,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:20:24,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:20:24,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:20:24,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:20:24,631 INFO L87 Difference]: Start difference. First operand 7666 states and 9014 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:27,596 INFO L93 Difference]: Finished difference Result 12582 states and 14782 transitions. [2022-11-26 00:20:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:20:27,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 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 110 [2022-11-26 00:20:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:27,607 INFO L225 Difference]: With dead ends: 12582 [2022-11-26 00:20:27,607 INFO L226 Difference]: Without dead ends: 9148 [2022-11-26 00:20:27,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:20:27,610 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 607 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:27,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 433 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:20:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9148 states. [2022-11-26 00:20:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9148 to 7015. [2022-11-26 00:20:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7015 states, 7014 states have (on average 1.1700883946392928) internal successors, (8207), 7014 states have internal predecessors, (8207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7015 states to 7015 states and 8207 transitions. [2022-11-26 00:20:29,587 INFO L78 Accepts]: Start accepts. Automaton has 7015 states and 8207 transitions. Word has length 110 [2022-11-26 00:20:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:29,587 INFO L495 AbstractCegarLoop]: Abstraction has 7015 states and 8207 transitions. [2022-11-26 00:20:29,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 7015 states and 8207 transitions. [2022-11-26 00:20:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-26 00:20:29,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:29,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:29,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-26 00:20:29,594 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:29,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2093024279, now seen corresponding path program 1 times [2022-11-26 00:20:29,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:29,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634954031] [2022-11-26 00:20:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:29,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:20:31,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:31,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634954031] [2022-11-26 00:20:31,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634954031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:20:31,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:20:31,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:20:31,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915526719] [2022-11-26 00:20:31,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:20:31,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:20:31,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:31,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:20:31,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:20:31,043 INFO L87 Difference]: Start difference. First operand 7015 states and 8207 transitions. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:34,670 INFO L93 Difference]: Finished difference Result 10506 states and 12326 transitions. [2022-11-26 00:20:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:20:34,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 8 states have internal predecessors, (104), 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 110 [2022-11-26 00:20:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:34,681 INFO L225 Difference]: With dead ends: 10506 [2022-11-26 00:20:34,681 INFO L226 Difference]: Without dead ends: 8605 [2022-11-26 00:20:34,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:20:34,685 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 513 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:34,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1486 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:20:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2022-11-26 00:20:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 6600. [2022-11-26 00:20:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6600 states, 6599 states have (on average 1.1719957569328687) internal successors, (7734), 6599 states have internal predecessors, (7734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 7734 transitions. [2022-11-26 00:20:36,443 INFO L78 Accepts]: Start accepts. Automaton has 6600 states and 7734 transitions. Word has length 110 [2022-11-26 00:20:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:36,444 INFO L495 AbstractCegarLoop]: Abstraction has 6600 states and 7734 transitions. [2022-11-26 00:20:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6600 states and 7734 transitions. [2022-11-26 00:20:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-26 00:20:36,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:36,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:36,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:20:36,448 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash -698450514, now seen corresponding path program 1 times [2022-11-26 00:20:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:36,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318215487] [2022-11-26 00:20:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:36,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:20:38,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318215487] [2022-11-26 00:20:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318215487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:20:38,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:20:38,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-26 00:20:38,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714774455] [2022-11-26 00:20:38,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:20:38,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:20:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:20:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:20:38,707 INFO L87 Difference]: Start difference. First operand 6600 states and 7734 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 13 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:44,538 INFO L93 Difference]: Finished difference Result 9930 states and 11657 transitions. [2022-11-26 00:20:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:20:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 13 states have internal predecessors, (109), 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 110 [2022-11-26 00:20:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:44,548 INFO L225 Difference]: With dead ends: 9930 [2022-11-26 00:20:44,548 INFO L226 Difference]: Without dead ends: 7730 [2022-11-26 00:20:44,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:20:44,551 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 615 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:44,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1704 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 00:20:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7730 states. [2022-11-26 00:20:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7730 to 6560. [2022-11-26 00:20:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6560 states, 6559 states have (on average 1.1690806525384967) internal successors, (7668), 6559 states have internal predecessors, (7668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 7668 transitions. [2022-11-26 00:20:46,475 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 7668 transitions. Word has length 110 [2022-11-26 00:20:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:46,475 INFO L495 AbstractCegarLoop]: Abstraction has 6560 states and 7668 transitions. [2022-11-26 00:20:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 13 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 7668 transitions. [2022-11-26 00:20:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-26 00:20:46,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:46,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-26 00:20:46,480 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1063027371, now seen corresponding path program 1 times [2022-11-26 00:20:46,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:46,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194290126] [2022-11-26 00:20:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:46,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:20:51,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194290126] [2022-11-26 00:20:51,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194290126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:20:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705405607] [2022-11-26 00:20:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:51,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:20:51,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:20:51,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:20:51,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:20:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:51,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-26 00:20:51,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:20:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:20:59,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:20:59,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705405607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:20:59,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:20:59,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [24] total 42 [2022-11-26 00:20:59,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963475449] [2022-11-26 00:20:59,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:20:59,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:20:59,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:59,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:20:59,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:20:59,217 INFO L87 Difference]: Start difference. First operand 6560 states and 7668 transitions. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:06,311 INFO L93 Difference]: Finished difference Result 7841 states and 9173 transitions. [2022-11-26 00:21:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:21:06,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 19 states have internal predecessors, (109), 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 110 [2022-11-26 00:21:06,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:06,320 INFO L225 Difference]: With dead ends: 7841 [2022-11-26 00:21:06,320 INFO L226 Difference]: Without dead ends: 6718 [2022-11-26 00:21:06,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=242, Invalid=2838, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:21:06,324 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 253 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:06,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1671 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:21:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2022-11-26 00:21:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 6612. [2022-11-26 00:21:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 1.1669944032672819) internal successors, (7715), 6611 states have internal predecessors, (7715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 7715 transitions. [2022-11-26 00:21:08,387 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 7715 transitions. Word has length 110 [2022-11-26 00:21:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:08,388 INFO L495 AbstractCegarLoop]: Abstraction has 6612 states and 7715 transitions. [2022-11-26 00:21:08,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 7715 transitions. [2022-11-26 00:21:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-26 00:21:08,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:08,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:08,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:21:08,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-26 00:21:08,600 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:21:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1141872604, now seen corresponding path program 1 times [2022-11-26 00:21:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:08,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169361378] [2022-11-26 00:21:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:21:10,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:10,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169361378] [2022-11-26 00:21:10,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169361378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:10,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:10,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-26 00:21:10,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551745029] [2022-11-26 00:21:10,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:10,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:21:10,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:21:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:21:10,109 INFO L87 Difference]: Start difference. First operand 6612 states and 7715 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:14,164 INFO L93 Difference]: Finished difference Result 8756 states and 10275 transitions. [2022-11-26 00:21:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:21:14,165 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 12 states have internal predecessors, (106), 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 110 [2022-11-26 00:21:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:14,173 INFO L225 Difference]: With dead ends: 8756 [2022-11-26 00:21:14,173 INFO L226 Difference]: Without dead ends: 7929 [2022-11-26 00:21:14,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:21:14,176 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 381 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:14,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 2275 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:21:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7929 states. [2022-11-26 00:21:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7929 to 6753. [2022-11-26 00:21:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6753 states, 6752 states have (on average 1.1648400473933649) internal successors, (7865), 6752 states have internal predecessors, (7865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6753 states to 6753 states and 7865 transitions. [2022-11-26 00:21:16,571 INFO L78 Accepts]: Start accepts. Automaton has 6753 states and 7865 transitions. Word has length 110 [2022-11-26 00:21:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:16,571 INFO L495 AbstractCegarLoop]: Abstraction has 6753 states and 7865 transitions. [2022-11-26 00:21:16,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 6753 states and 7865 transitions. [2022-11-26 00:21:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-26 00:21:16,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:16,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:16,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-26 00:21:16,576 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:21:16,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1084140178, now seen corresponding path program 1 times [2022-11-26 00:21:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:16,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524759523] [2022-11-26 00:21:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:16,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:21:16,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:16,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524759523] [2022-11-26 00:21:16,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524759523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:16,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:16,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:21:16,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430184664] [2022-11-26 00:21:16,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:16,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:21:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:16,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:21:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:21:16,635 INFO L87 Difference]: Start difference. First operand 6753 states and 7865 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:19,289 INFO L93 Difference]: Finished difference Result 9378 states and 10978 transitions. [2022-11-26 00:21:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:21:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 111 [2022-11-26 00:21:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:19,298 INFO L225 Difference]: With dead ends: 9378 [2022-11-26 00:21:19,298 INFO L226 Difference]: Without dead ends: 6696 [2022-11-26 00:21:19,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:21:19,304 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 175 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:19,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 113 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:21:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6696 states. [2022-11-26 00:21:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6696 to 6578. [2022-11-26 00:21:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6578 states, 6577 states have (on average 1.1540215903907556) internal successors, (7590), 6577 states have internal predecessors, (7590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6578 states to 6578 states and 7590 transitions. [2022-11-26 00:21:21,797 INFO L78 Accepts]: Start accepts. Automaton has 6578 states and 7590 transitions. Word has length 111 [2022-11-26 00:21:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:21,797 INFO L495 AbstractCegarLoop]: Abstraction has 6578 states and 7590 transitions. [2022-11-26 00:21:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 6578 states and 7590 transitions. [2022-11-26 00:21:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-26 00:21:21,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:21,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:21,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-26 00:21:21,803 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:21:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:21,803 INFO L85 PathProgramCache]: Analyzing trace with hash -188273805, now seen corresponding path program 1 times [2022-11-26 00:21:21,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:21,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263980165] [2022-11-26 00:21:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:21,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:21:21,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:21,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263980165] [2022-11-26 00:21:21,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263980165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:21,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:21,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:21:21,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009826862] [2022-11-26 00:21:21,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:21,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:21:21,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:21:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:21:21,881 INFO L87 Difference]: Start difference. First operand 6578 states and 7590 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:24,043 INFO L93 Difference]: Finished difference Result 7752 states and 8941 transitions. [2022-11-26 00:21:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:21:24,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 112 [2022-11-26 00:21:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:24,051 INFO L225 Difference]: With dead ends: 7752 [2022-11-26 00:21:24,051 INFO L226 Difference]: Without dead ends: 5930 [2022-11-26 00:21:24,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:21:24,054 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 113 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:24,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 394 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:21:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5930 states. [2022-11-26 00:21:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5930 to 5928. [2022-11-26 00:21:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 5927 states have (on average 1.1456048591192847) internal successors, (6790), 5927 states have internal predecessors, (6790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 6790 transitions. [2022-11-26 00:21:26,229 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 6790 transitions. Word has length 112 [2022-11-26 00:21:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:26,229 INFO L495 AbstractCegarLoop]: Abstraction has 5928 states and 6790 transitions. [2022-11-26 00:21:26,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 6790 transitions. [2022-11-26 00:21:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:21:26,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:26,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:26,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-26 00:21:26,234 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:21:26,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:26,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1280697963, now seen corresponding path program 1 times [2022-11-26 00:21:26,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:26,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65342819] [2022-11-26 00:21:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:21:26,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:26,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65342819] [2022-11-26 00:21:26,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65342819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:26,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:26,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-26 00:21:26,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226391342] [2022-11-26 00:21:26,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:26,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:21:26,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:21:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:21:26,870 INFO L87 Difference]: Start difference. First operand 5928 states and 6790 transitions. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:29,682 INFO L93 Difference]: Finished difference Result 9078 states and 10472 transitions. [2022-11-26 00:21:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:21:29,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 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 113 [2022-11-26 00:21:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:29,690 INFO L225 Difference]: With dead ends: 9078 [2022-11-26 00:21:29,690 INFO L226 Difference]: Without dead ends: 5914 [2022-11-26 00:21:29,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:21:29,694 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1143 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:29,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 338 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:21:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5914 states. [2022-11-26 00:21:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5914 to 4544. [2022-11-26 00:21:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 1.1322914373761832) internal successors, (5144), 4543 states have internal predecessors, (5144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 5144 transitions. [2022-11-26 00:21:31,582 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 5144 transitions. Word has length 113 [2022-11-26 00:21:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:31,582 INFO L495 AbstractCegarLoop]: Abstraction has 4544 states and 5144 transitions. [2022-11-26 00:21:31,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 5144 transitions. [2022-11-26 00:21:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:21:31,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:31,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:31,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-26 00:21:31,586 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:21:31,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:31,586 INFO L85 PathProgramCache]: Analyzing trace with hash -926745419, now seen corresponding path program 1 times [2022-11-26 00:21:31,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:31,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097358653] [2022-11-26 00:21:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:21:35,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:35,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097358653] [2022-11-26 00:21:35,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097358653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:21:35,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633057272] [2022-11-26 00:21:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:35,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:35,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:35,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:35,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:21:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:35,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-26 00:21:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:21:58,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:21:58,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633057272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:58,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:21:58,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [22] total 50 [2022-11-26 00:21:58,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460786451] [2022-11-26 00:21:58,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:58,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:21:58,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:58,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:21:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 00:21:58,347 INFO L87 Difference]: Start difference. First operand 4544 states and 5144 transitions. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 29 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:20,139 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 206 DAG size of output: 123 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:22:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:36,519 INFO L93 Difference]: Finished difference Result 5603 states and 6352 transitions. [2022-11-26 00:22:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-26 00:22:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 29 states have internal predecessors, (111), 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 113 [2022-11-26 00:22:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:36,525 INFO L225 Difference]: With dead ends: 5603 [2022-11-26 00:22:36,525 INFO L226 Difference]: Without dead ends: 4755 [2022-11-26 00:22:36,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=369, Invalid=4743, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:22:36,528 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 651 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 2442 SdHoareTripleChecker+Invalid, 3778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:36,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 2442 Invalid, 3778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-26 00:22:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2022-11-26 00:22:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 4623. [2022-11-26 00:22:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 1.1304630030289917) internal successors, (5225), 4622 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 5225 transitions. [2022-11-26 00:22:38,465 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 5225 transitions. Word has length 113 [2022-11-26 00:22:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:38,465 INFO L495 AbstractCegarLoop]: Abstraction has 4623 states and 5225 transitions. [2022-11-26 00:22:38,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 29 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 5225 transitions. [2022-11-26 00:22:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:22:38,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:38,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:38,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:38,677 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash -299256305, now seen corresponding path program 1 times [2022-11-26 00:22:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:38,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833854304] [2022-11-26 00:22:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:22:41,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:41,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833854304] [2022-11-26 00:22:41,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833854304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:22:41,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749551108] [2022-11-26 00:22:41,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:41,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:41,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:41,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:41,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:22:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:42,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-26 00:22:42,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:22:50,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:22:50,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749551108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:50,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:22:50,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [21] total 45 [2022-11-26 00:22:50,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690127888] [2022-11-26 00:22:50,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:50,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:22:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:22:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1918, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:22:50,539 INFO L87 Difference]: Start difference. First operand 4623 states and 5225 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:57,508 INFO L93 Difference]: Finished difference Result 5659 states and 6430 transitions. [2022-11-26 00:22:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:22:57,508 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 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 113 [2022-11-26 00:22:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:57,513 INFO L225 Difference]: With dead ends: 5659 [2022-11-26 00:22:57,513 INFO L226 Difference]: Without dead ends: 4503 [2022-11-26 00:22:57,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=259, Invalid=3401, Unknown=0, NotChecked=0, Total=3660 [2022-11-26 00:22:57,516 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 344 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 3236 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:57,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 2115 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3236 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-26 00:22:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2022-11-26 00:22:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4450. [2022-11-26 00:22:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4450 states, 4449 states have (on average 1.128343447965835) internal successors, (5020), 4449 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4450 states to 4450 states and 5020 transitions. [2022-11-26 00:22:59,403 INFO L78 Accepts]: Start accepts. Automaton has 4450 states and 5020 transitions. Word has length 113 [2022-11-26 00:22:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:59,403 INFO L495 AbstractCegarLoop]: Abstraction has 4450 states and 5020 transitions. [2022-11-26 00:22:59,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 4450 states and 5020 transitions. [2022-11-26 00:22:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:22:59,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:59,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:59,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:59,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:59,607 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:22:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:59,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1203527366, now seen corresponding path program 1 times [2022-11-26 00:22:59,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:22:59,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767177309] [2022-11-26 00:22:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:59,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:22:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:22:59,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:22:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767177309] [2022-11-26 00:22:59,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767177309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:22:59,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:22:59,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:22:59,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002735399] [2022-11-26 00:22:59,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:22:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:22:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:22:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:22:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:22:59,830 INFO L87 Difference]: Start difference. First operand 4450 states and 5020 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:02,751 INFO L93 Difference]: Finished difference Result 8231 states and 9378 transitions. [2022-11-26 00:23:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:23:02,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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 113 [2022-11-26 00:23:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:02,757 INFO L225 Difference]: With dead ends: 8231 [2022-11-26 00:23:02,757 INFO L226 Difference]: Without dead ends: 5777 [2022-11-26 00:23:02,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:23:02,760 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 512 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:02,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 523 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:23:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2022-11-26 00:23:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 5668. [2022-11-26 00:23:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5668 states, 5667 states have (on average 1.1251102876301393) internal successors, (6376), 5667 states have internal predecessors, (6376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5668 states to 5668 states and 6376 transitions. [2022-11-26 00:23:05,038 INFO L78 Accepts]: Start accepts. Automaton has 5668 states and 6376 transitions. Word has length 113 [2022-11-26 00:23:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:05,039 INFO L495 AbstractCegarLoop]: Abstraction has 5668 states and 6376 transitions. [2022-11-26 00:23:05,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5668 states and 6376 transitions. [2022-11-26 00:23:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:23:05,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:05,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:05,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-26 00:23:05,043 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:23:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:05,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1081015307, now seen corresponding path program 1 times [2022-11-26 00:23:05,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:05,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888691901] [2022-11-26 00:23:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:05,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:08,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:08,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888691901] [2022-11-26 00:23:08,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888691901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:08,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784687725] [2022-11-26 00:23:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:08,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:08,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:08,441 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:08,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:23:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:08,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-26 00:23:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:23:21,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:23:21,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784687725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:21,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:23:21,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [21] total 43 [2022-11-26 00:23:21,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804325470] [2022-11-26 00:23:21,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:21,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:23:21,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:23:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:23:21,365 INFO L87 Difference]: Start difference. First operand 5668 states and 6376 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:28,132 INFO L93 Difference]: Finished difference Result 5863 states and 6592 transitions. [2022-11-26 00:23:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:23:28,133 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 23 states have internal predecessors, (107), 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 113 [2022-11-26 00:23:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:28,139 INFO L225 Difference]: With dead ends: 5863 [2022-11-26 00:23:28,140 INFO L226 Difference]: Without dead ends: 5439 [2022-11-26 00:23:28,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=253, Invalid=2827, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:23:28,142 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 188 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 2621 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:28,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1371 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2621 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-26 00:23:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5439 states. [2022-11-26 00:23:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5439 to 5391. [2022-11-26 00:23:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5391 states, 5390 states have (on average 1.1244897959183673) internal successors, (6061), 5390 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5391 states to 5391 states and 6061 transitions. [2022-11-26 00:23:30,186 INFO L78 Accepts]: Start accepts. Automaton has 5391 states and 6061 transitions. Word has length 113 [2022-11-26 00:23:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:30,186 INFO L495 AbstractCegarLoop]: Abstraction has 5391 states and 6061 transitions. [2022-11-26 00:23:30,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5391 states and 6061 transitions. [2022-11-26 00:23:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:23:30,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:30,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:30,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:30,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-26 00:23:30,391 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:23:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1788129854, now seen corresponding path program 1 times [2022-11-26 00:23:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:30,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630434361] [2022-11-26 00:23:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:23:33,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:33,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630434361] [2022-11-26 00:23:33,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630434361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:23:33,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614335780] [2022-11-26 00:23:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:33,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:33,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:33,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:33,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:23:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:33,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-26 00:23:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:23:42,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:23:42,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614335780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:42,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:23:42,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 42 [2022-11-26 00:23:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140317199] [2022-11-26 00:23:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:42,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:23:42,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:23:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1646, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:23:42,190 INFO L87 Difference]: Start difference. First operand 5391 states and 6061 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:50,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:50,036 INFO L93 Difference]: Finished difference Result 6075 states and 6833 transitions. [2022-11-26 00:23:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-26 00:23:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 21 states have internal predecessors, (111), 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 113 [2022-11-26 00:23:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:50,042 INFO L225 Difference]: With dead ends: 6075 [2022-11-26 00:23:50,042 INFO L226 Difference]: Without dead ends: 5852 [2022-11-26 00:23:50,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=328, Invalid=3454, Unknown=0, NotChecked=0, Total=3782 [2022-11-26 00:23:50,044 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 732 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:50,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 1888 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2045 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:23:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2022-11-26 00:23:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 5594. [2022-11-26 00:23:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5594 states, 5593 states have (on average 1.1235472912569282) internal successors, (6284), 5593 states have internal predecessors, (6284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5594 states to 5594 states and 6284 transitions. [2022-11-26 00:23:52,121 INFO L78 Accepts]: Start accepts. Automaton has 5594 states and 6284 transitions. Word has length 113 [2022-11-26 00:23:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:52,121 INFO L495 AbstractCegarLoop]: Abstraction has 5594 states and 6284 transitions. [2022-11-26 00:23:52,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5594 states and 6284 transitions. [2022-11-26 00:23:52,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:23:52,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:52,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:52,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:52,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-26 00:23:52,326 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:23:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:52,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1324354741, now seen corresponding path program 1 times [2022-11-26 00:23:52,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:52,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982083215] [2022-11-26 00:23:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:23:53,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:23:53,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982083215] [2022-11-26 00:23:53,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982083215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:53,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:53,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:23:53,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105438153] [2022-11-26 00:23:53,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:53,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:23:53,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:23:53,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:23:53,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:23:53,348 INFO L87 Difference]: Start difference. First operand 5594 states and 6284 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:57,478 INFO L93 Difference]: Finished difference Result 7007 states and 7860 transitions. [2022-11-26 00:23:57,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:23:57,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 8 states have internal predecessors, (107), 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 113 [2022-11-26 00:23:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:57,486 INFO L225 Difference]: With dead ends: 7007 [2022-11-26 00:23:57,486 INFO L226 Difference]: Without dead ends: 6665 [2022-11-26 00:23:57,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:23:57,489 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 427 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:57,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1300 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:23:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2022-11-26 00:23:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 5594. [2022-11-26 00:23:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5594 states, 5593 states have (on average 1.1231897014124799) internal successors, (6282), 5593 states have internal predecessors, (6282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5594 states to 5594 states and 6282 transitions. [2022-11-26 00:23:59,745 INFO L78 Accepts]: Start accepts. Automaton has 5594 states and 6282 transitions. Word has length 113 [2022-11-26 00:23:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:59,746 INFO L495 AbstractCegarLoop]: Abstraction has 5594 states and 6282 transitions. [2022-11-26 00:23:59,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5594 states and 6282 transitions. [2022-11-26 00:23:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:23:59,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:59,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-26 00:23:59,750 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:23:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash -924985157, now seen corresponding path program 1 times [2022-11-26 00:23:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:23:59,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375160706] [2022-11-26 00:23:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:23:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:01,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:01,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375160706] [2022-11-26 00:24:01,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375160706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:24:01,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136219240] [2022-11-26 00:24:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:01,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:01,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:24:01,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:24:01,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:24:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:01,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-26 00:24:01,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:24:08,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:08,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136219240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:08,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:24:08,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [15] total 37 [2022-11-26 00:24:08,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519262466] [2022-11-26 00:24:08,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:08,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:24:08,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:24:08,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:24:08,863 INFO L87 Difference]: Start difference. First operand 5594 states and 6282 transitions. Second operand has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:15,449 INFO L93 Difference]: Finished difference Result 5990 states and 6721 transitions. [2022-11-26 00:24:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:24:15,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 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 113 [2022-11-26 00:24:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:15,454 INFO L225 Difference]: With dead ends: 5990 [2022-11-26 00:24:15,454 INFO L226 Difference]: Without dead ends: 5644 [2022-11-26 00:24:15,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:24:15,456 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 329 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 2949 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:15,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 1833 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2949 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-26 00:24:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2022-11-26 00:24:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 5593. [2022-11-26 00:24:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5593 states, 5592 states have (on average 1.122854077253219) internal successors, (6279), 5592 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5593 states to 5593 states and 6279 transitions. [2022-11-26 00:24:17,609 INFO L78 Accepts]: Start accepts. Automaton has 5593 states and 6279 transitions. Word has length 113 [2022-11-26 00:24:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:17,610 INFO L495 AbstractCegarLoop]: Abstraction has 5593 states and 6279 transitions. [2022-11-26 00:24:17,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5593 states and 6279 transitions. [2022-11-26 00:24:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-26 00:24:17,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:17,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:17,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:17,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-26 00:24:17,814 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:24:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1463124639, now seen corresponding path program 1 times [2022-11-26 00:24:17,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:24:17,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084825468] [2022-11-26 00:24:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:17,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:24:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:20,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:20,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084825468] [2022-11-26 00:24:20,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084825468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:24:20,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059474357] [2022-11-26 00:24:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:20,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:20,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:24:20,903 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:24:20,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:24:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:21,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-26 00:24:21,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:24:31,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:31,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059474357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:31,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:24:31,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [23] total 49 [2022-11-26 00:24:31,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029754890] [2022-11-26 00:24:31,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:31,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 00:24:31,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:31,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 00:24:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2270, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:24:31,212 INFO L87 Difference]: Start difference. First operand 5593 states and 6279 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:39,494 INFO L93 Difference]: Finished difference Result 6309 states and 7085 transitions. [2022-11-26 00:24:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-26 00:24:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 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 113 [2022-11-26 00:24:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:39,500 INFO L225 Difference]: With dead ends: 6309 [2022-11-26 00:24:39,500 INFO L226 Difference]: Without dead ends: 5467 [2022-11-26 00:24:39,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=364, Invalid=4466, Unknown=0, NotChecked=0, Total=4830 [2022-11-26 00:24:39,503 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 663 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 3370 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1976 SdHoareTripleChecker+Invalid, 3402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:39,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1976 Invalid, 3402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3370 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-26 00:24:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2022-11-26 00:24:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 5408. [2022-11-26 00:24:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5408 states, 5407 states have (on average 1.1213242093582394) internal successors, (6063), 5407 states have internal predecessors, (6063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 6063 transitions. [2022-11-26 00:24:41,659 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 6063 transitions. Word has length 113 [2022-11-26 00:24:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:41,659 INFO L495 AbstractCegarLoop]: Abstraction has 5408 states and 6063 transitions. [2022-11-26 00:24:41,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 6063 transitions. [2022-11-26 00:24:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-26 00:24:41,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:41,662 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:41,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:41,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-26 00:24:41,863 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:24:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash -42058509, now seen corresponding path program 1 times [2022-11-26 00:24:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:24:41,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891924801] [2022-11-26 00:24:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:24:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:24:41,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891924801] [2022-11-26 00:24:41,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891924801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:41,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:41,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:24:41,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586722829] [2022-11-26 00:24:41,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:41,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:24:41,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:41,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:24:41,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:41,913 INFO L87 Difference]: Start difference. First operand 5408 states and 6063 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:44,553 INFO L93 Difference]: Finished difference Result 9073 states and 10219 transitions. [2022-11-26 00:24:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:24:44,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 114 [2022-11-26 00:24:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:44,559 INFO L225 Difference]: With dead ends: 9073 [2022-11-26 00:24:44,559 INFO L226 Difference]: Without dead ends: 5347 [2022-11-26 00:24:44,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:44,563 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 166 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:44,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 190 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:24:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2022-11-26 00:24:46,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 4524. [2022-11-26 00:24:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 1.1012602255140393) internal successors, (4981), 4523 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 4981 transitions. [2022-11-26 00:24:46,396 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 4981 transitions. Word has length 114 [2022-11-26 00:24:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:46,397 INFO L495 AbstractCegarLoop]: Abstraction has 4524 states and 4981 transitions. [2022-11-26 00:24:46,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 4981 transitions. [2022-11-26 00:24:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-26 00:24:46,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:46,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:46,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-26 00:24:46,400 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:24:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:46,401 INFO L85 PathProgramCache]: Analyzing trace with hash -108067344, now seen corresponding path program 1 times [2022-11-26 00:24:46,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:24:46,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9175660] [2022-11-26 00:24:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:46,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:24:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:24:46,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:46,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9175660] [2022-11-26 00:24:46,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9175660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:46,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:46,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:24:46,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620494040] [2022-11-26 00:24:46,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:24:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:24:46,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:46,454 INFO L87 Difference]: Start difference. First operand 4524 states and 4981 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:48,289 INFO L93 Difference]: Finished difference Result 5201 states and 5729 transitions. [2022-11-26 00:24:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:24:48,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 114 [2022-11-26 00:24:48,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:48,294 INFO L225 Difference]: With dead ends: 5201 [2022-11-26 00:24:48,294 INFO L226 Difference]: Without dead ends: 3945 [2022-11-26 00:24:48,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:48,296 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 103 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:48,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 335 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:24:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2022-11-26 00:24:49,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3715. [2022-11-26 00:24:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3715 states, 3714 states have (on average 1.0875067312870221) internal successors, (4039), 3714 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 4039 transitions. [2022-11-26 00:24:49,925 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 4039 transitions. Word has length 114 [2022-11-26 00:24:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:49,925 INFO L495 AbstractCegarLoop]: Abstraction has 3715 states and 4039 transitions. [2022-11-26 00:24:49,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 4039 transitions. [2022-11-26 00:24:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:24:49,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:49,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:49,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-26 00:24:49,928 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:24:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1562265750, now seen corresponding path program 1 times [2022-11-26 00:24:49,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:24:49,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840716148] [2022-11-26 00:24:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:49,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:24:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:24:51,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:51,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840716148] [2022-11-26 00:24:51,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840716148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:51,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:51,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:24:51,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647609604] [2022-11-26 00:24:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:51,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:24:51,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:24:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:24:51,128 INFO L87 Difference]: Start difference. First operand 3715 states and 4039 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:54,608 INFO L93 Difference]: Finished difference Result 5013 states and 5451 transitions. [2022-11-26 00:24:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:24:54,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 8 states have internal predecessors, (110), 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 116 [2022-11-26 00:24:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:54,614 INFO L225 Difference]: With dead ends: 5013 [2022-11-26 00:24:54,614 INFO L226 Difference]: Without dead ends: 4440 [2022-11-26 00:24:54,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:24:54,617 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 339 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:54,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1008 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:24:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2022-11-26 00:24:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3626. [2022-11-26 00:24:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 1.0877241379310345) internal successors, (3943), 3625 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 3943 transitions. [2022-11-26 00:24:56,251 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 3943 transitions. Word has length 116 [2022-11-26 00:24:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:56,251 INFO L495 AbstractCegarLoop]: Abstraction has 3626 states and 3943 transitions. [2022-11-26 00:24:56,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 3943 transitions. [2022-11-26 00:24:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:24:56,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:56,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:56,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-26 00:24:56,255 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:24:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash 728973923, now seen corresponding path program 1 times [2022-11-26 00:24:56,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:24:56,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825499587] [2022-11-26 00:24:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:56,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:24:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:24:56,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:24:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825499587] [2022-11-26 00:24:56,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825499587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:56,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:56,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:24:56,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515138166] [2022-11-26 00:24:56,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:56,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:24:56,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:24:56,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:24:56,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:24:56,441 INFO L87 Difference]: Start difference. First operand 3626 states and 3943 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:59,001 INFO L93 Difference]: Finished difference Result 6164 states and 6763 transitions. [2022-11-26 00:24:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:24:59,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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 116 [2022-11-26 00:24:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:59,007 INFO L225 Difference]: With dead ends: 6164 [2022-11-26 00:24:59,007 INFO L226 Difference]: Without dead ends: 4164 [2022-11-26 00:24:59,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:24:59,010 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 479 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:59,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 490 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:24:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2022-11-26 00:25:00,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 4078. [2022-11-26 00:25:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 1.0789796418935491) internal successors, (4399), 4077 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:25:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 4399 transitions. [2022-11-26 00:25:00,899 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 4399 transitions. Word has length 116 [2022-11-26 00:25:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:25:00,899 INFO L495 AbstractCegarLoop]: Abstraction has 4078 states and 4399 transitions. [2022-11-26 00:25:00,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:25:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 4399 transitions. [2022-11-26 00:25:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:25:00,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:25:00,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:25:00,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-26 00:25:00,902 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:25:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:25:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1777111079, now seen corresponding path program 1 times [2022-11-26 00:25:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:25:00,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740560604] [2022-11-26 00:25:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:25:00,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:25:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:25:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:25:05,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:25:05,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740560604] [2022-11-26 00:25:05,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740560604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:25:05,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087034631] [2022-11-26 00:25:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:25:05,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:25:05,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:25:05,173 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:25:05,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:25:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:25:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-26 00:25:05,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:25:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:25:25,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:25:25,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087034631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:25:25,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:25:25,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [27] total 55 [2022-11-26 00:25:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993671895] [2022-11-26 00:25:25,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:25:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:25:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:25:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:25:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2879, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:25:25,971 INFO L87 Difference]: Start difference. First operand 4078 states and 4399 transitions. Second operand has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 29 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:25:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:25:36,016 INFO L93 Difference]: Finished difference Result 4789 states and 5159 transitions. [2022-11-26 00:25:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 00:25:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 29 states have internal predecessors, (113), 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 116 [2022-11-26 00:25:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:25:36,021 INFO L225 Difference]: With dead ends: 4789 [2022-11-26 00:25:36,021 INFO L226 Difference]: Without dead ends: 4206 [2022-11-26 00:25:36,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=326, Invalid=4644, Unknown=0, NotChecked=0, Total=4970 [2022-11-26 00:25:36,024 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 238 mSDsluCounter, 1941 mSDsCounter, 0 mSdLazyCounter, 3722 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 3730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:25:36,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 2164 Invalid, 3730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3722 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-26 00:25:36,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2022-11-26 00:25:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 4069. [2022-11-26 00:25:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4069 states, 4068 states have (on average 1.0781710914454277) internal successors, (4386), 4068 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:25:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 4386 transitions. [2022-11-26 00:25:37,931 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 4386 transitions. Word has length 116 [2022-11-26 00:25:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:25:37,931 INFO L495 AbstractCegarLoop]: Abstraction has 4069 states and 4386 transitions. [2022-11-26 00:25:37,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 29 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:25:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 4386 transitions. [2022-11-26 00:25:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:25:37,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:25:37,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:25:37,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-26 00:25:38,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-26 00:25:38,142 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:25:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:25:38,142 INFO L85 PathProgramCache]: Analyzing trace with hash -902178564, now seen corresponding path program 1 times [2022-11-26 00:25:38,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:25:38,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687452048] [2022-11-26 00:25:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:25:38,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:25:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:25:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:25:42,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:25:42,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687452048] [2022-11-26 00:25:42,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687452048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:25:42,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763829122] [2022-11-26 00:25:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:25:42,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:25:42,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:25:42,479 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:25:42,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ebabe9f-87a3-40ab-ac58-384ba1dd6691/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:25:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:25:42,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-26 00:25:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates...