./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba --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 22565549446fb10d699e81ca4083722d91d5f2743033fe3de4e7c76b9089640a --- 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-b5237d8 [2022-11-22 02:16:41,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:16:41,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:16:41,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:16:41,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:16:41,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:16:41,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:16:41,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:16:41,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:16:41,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:16:41,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:16:41,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:16:41,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:16:41,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:16:41,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:16:41,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:16:41,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:16:41,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:16:41,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:16:41,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:16:41,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:16:41,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:16:41,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:16:41,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:16:41,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:16:41,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:16:41,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:16:41,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:16:41,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:16:41,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:16:41,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:16:41,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:16:41,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:16:41,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:16:41,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:16:41,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:16:41,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:16:41,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:16:41,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:16:41,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:16:41,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:16:41,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:16:41,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:16:41,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:16:41,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:16:41,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:16:41,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:16:41,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:16:41,737 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:16:41,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:16:41,737 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:16:41,737 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:16:41,738 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:16:41,739 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:16:41,739 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:16:41,739 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:16:41,739 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:16:41,740 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:16:41,740 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:16:41,740 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:16:41,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:16:41,741 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:16:41,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:16:41,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:16:41,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:16:41,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:16:41,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:16:41,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:16:41,742 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:16:41,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:16:41,743 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:16:41,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:16:41,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:16:41,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:16:41,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:16:41,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:16:41,744 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:16:41,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:16:41,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:16:41,745 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:16:41,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:16:41,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:16:41,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:16:41,746 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_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22565549446fb10d699e81ca4083722d91d5f2743033fe3de4e7c76b9089640a [2022-11-22 02:16:42,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:16:42,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:16:42,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:16:42,067 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:16:42,069 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:16:42,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-22 02:16:45,228 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:16:45,543 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:16:45,544 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-22 02:16:45,554 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/data/fadc1488e/737bc650204d4657ba68483a14ece739/FLAGfbd669748 [2022-11-22 02:16:45,569 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/data/fadc1488e/737bc650204d4657ba68483a14ece739 [2022-11-22 02:16:45,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:16:45,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:16:45,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:16:45,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:16:45,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:16:45,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:16:45" (1/1) ... [2022-11-22 02:16:45,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13eb600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:45, skipping insertion in model container [2022-11-22 02:16:45,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:16:45" (1/1) ... [2022-11-22 02:16:45,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:16:45,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:16:45,859 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_8c7ba43c-3371-4b91-a27f-c4330b95fe99/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7163,7176] [2022-11-22 02:16:45,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:16:45,961 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:16:46,013 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_8c7ba43c-3371-4b91-a27f-c4330b95fe99/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7163,7176] [2022-11-22 02:16:46,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:16:46,060 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:16:46,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46 WrapperNode [2022-11-22 02:16:46,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:16:46,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:16:46,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:16:46,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:16:46,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,120 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 592 [2022-11-22 02:16:46,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:16:46,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:16:46,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:16:46,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:16:46,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,151 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:16:46,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:16:46,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:16:46,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:16:46,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (1/1) ... [2022-11-22 02:16:46,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:16:46,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:16:46,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:16:46,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:16:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:16:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:16:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:16:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:16:46,384 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:16:46,386 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:16:47,024 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:16:47,280 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:16:47,281 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:16:47,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:16:47 BoogieIcfgContainer [2022-11-22 02:16:47,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:16:47,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:16:47,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:16:47,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:16:47,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:16:45" (1/3) ... [2022-11-22 02:16:47,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456eaad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:16:47, skipping insertion in model container [2022-11-22 02:16:47,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:46" (2/3) ... [2022-11-22 02:16:47,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456eaad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:16:47, skipping insertion in model container [2022-11-22 02:16:47,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:16:47" (3/3) ... [2022-11-22 02:16:47,293 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-22 02:16:47,313 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:16:47,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:16:47,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:16:47,372 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;@1fc0c831, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:16:47,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:16:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 1.6929824561403508) internal successors, (193), 115 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:16:47,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:47,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:16:47,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:16:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash 309617707, now seen corresponding path program 1 times [2022-11-22 02:16:47,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:47,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122791524] [2022-11-22 02:16:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:47,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:48,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:48,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122791524] [2022-11-22 02:16:48,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122791524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:48,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:48,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:16:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192655722] [2022-11-22 02:16:48,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:48,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:48,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:48,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:48,142 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 1.6929824561403508) internal successors, (193), 115 states have internal predecessors, (193), 0 states have call successors, (0), 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 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:48,472 INFO L93 Difference]: Finished difference Result 311 states and 498 transitions. [2022-11-22 02:16:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:16:48,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2022-11-22 02:16:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:48,487 INFO L225 Difference]: With dead ends: 311 [2022-11-22 02:16:48,488 INFO L226 Difference]: Without dead ends: 231 [2022-11-22 02:16:48,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:48,494 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 372 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:48,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 534 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:16:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-22 02:16:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2022-11-22 02:16:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.3938053097345133) internal successors, (315), 226 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 315 transitions. [2022-11-22 02:16:48,568 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 315 transitions. Word has length 42 [2022-11-22 02:16:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:48,568 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 315 transitions. [2022-11-22 02:16:48,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 315 transitions. [2022-11-22 02:16:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:16:48,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:48,571 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] [2022-11-22 02:16:48,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:16:48,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:16:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash 931123585, now seen corresponding path program 1 times [2022-11-22 02:16:48,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:48,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664997022] [2022-11-22 02:16:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:48,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:48,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:48,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664997022] [2022-11-22 02:16:48,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664997022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:48,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:48,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:16:48,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013753520] [2022-11-22 02:16:48,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:48,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:48,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:48,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:48,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:48,750 INFO L87 Difference]: Start difference. First operand 227 states and 315 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:49,050 INFO L93 Difference]: Finished difference Result 500 states and 706 transitions. [2022-11-22 02:16:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:16:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-11-22 02:16:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:49,056 INFO L225 Difference]: With dead ends: 500 [2022-11-22 02:16:49,056 INFO L226 Difference]: Without dead ends: 299 [2022-11-22 02:16:49,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:16:49,068 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 405 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:49,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 156 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:16:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-22 02:16:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2022-11-22 02:16:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.3986486486486487) internal successors, (414), 296 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 414 transitions. [2022-11-22 02:16:49,141 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 414 transitions. Word has length 43 [2022-11-22 02:16:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:49,142 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 414 transitions. [2022-11-22 02:16:49,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 414 transitions. [2022-11-22 02:16:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:16:49,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:49,148 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] [2022-11-22 02:16:49,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:16:49,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:16:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1767429776, now seen corresponding path program 1 times [2022-11-22 02:16:49,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:49,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471036565] [2022-11-22 02:16:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:49,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:49,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471036565] [2022-11-22 02:16:49,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471036565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:49,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:49,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:16:49,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735635845] [2022-11-22 02:16:49,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:49,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:49,320 INFO L87 Difference]: Start difference. First operand 297 states and 414 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:49,583 INFO L93 Difference]: Finished difference Result 718 states and 1023 transitions. [2022-11-22 02:16:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:16:49,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-11-22 02:16:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:49,587 INFO L225 Difference]: With dead ends: 718 [2022-11-22 02:16:49,587 INFO L226 Difference]: Without dead ends: 463 [2022-11-22 02:16:49,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:16:49,593 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 385 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:49,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 168 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:16:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-22 02:16:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2022-11-22 02:16:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4108695652173913) internal successors, (649), 460 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 649 transitions. [2022-11-22 02:16:49,675 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 649 transitions. Word has length 43 [2022-11-22 02:16:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:49,675 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 649 transitions. [2022-11-22 02:16:49,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 649 transitions. [2022-11-22 02:16:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:16:49,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:49,677 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] [2022-11-22 02:16:49,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:16:49,677 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:16:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2036916769, now seen corresponding path program 1 times [2022-11-22 02:16:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:49,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6496141] [2022-11-22 02:16:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:49,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:49,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6496141] [2022-11-22 02:16:49,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6496141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:49,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:49,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:16:49,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067300611] [2022-11-22 02:16:49,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:49,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:49,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:49,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:49,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:49,773 INFO L87 Difference]: Start difference. First operand 461 states and 649 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:50,126 INFO L93 Difference]: Finished difference Result 1190 states and 1707 transitions. [2022-11-22 02:16:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:16:50,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-11-22 02:16:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:50,130 INFO L225 Difference]: With dead ends: 1190 [2022-11-22 02:16:50,130 INFO L226 Difference]: Without dead ends: 791 [2022-11-22 02:16:50,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:16:50,132 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 368 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:50,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 176 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:16:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-11-22 02:16:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 789. [2022-11-22 02:16:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 1.4200507614213198) internal successors, (1119), 788 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1119 transitions. [2022-11-22 02:16:50,296 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1119 transitions. Word has length 43 [2022-11-22 02:16:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:50,298 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1119 transitions. [2022-11-22 02:16:50,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1119 transitions. [2022-11-22 02:16:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:16:50,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:50,302 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] [2022-11-22 02:16:50,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:16:50,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:16:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash 364605887, now seen corresponding path program 1 times [2022-11-22 02:16:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:50,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259989205] [2022-11-22 02:16:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:50,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:50,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259989205] [2022-11-22 02:16:50,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259989205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:50,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:50,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 02:16:50,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029189022] [2022-11-22 02:16:50,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:50,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:16:50,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:50,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:16:50,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:16:50,944 INFO L87 Difference]: Start difference. First operand 789 states and 1119 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:52,569 INFO L93 Difference]: Finished difference Result 4386 states and 6362 transitions. [2022-11-22 02:16:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:16:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-22 02:16:52,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:52,585 INFO L225 Difference]: With dead ends: 4386 [2022-11-22 02:16:52,585 INFO L226 Difference]: Without dead ends: 3728 [2022-11-22 02:16:52,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:16:52,589 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1216 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:52,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 834 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:16:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2022-11-22 02:16:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2326. [2022-11-22 02:16:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 1.4189247311827957) internal successors, (3299), 2325 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3299 transitions. [2022-11-22 02:16:53,182 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3299 transitions. Word has length 44 [2022-11-22 02:16:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:53,184 INFO L495 AbstractCegarLoop]: Abstraction has 2326 states and 3299 transitions. [2022-11-22 02:16:53,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3299 transitions. [2022-11-22 02:16:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:16:53,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:53,192 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] [2022-11-22 02:16:53,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:16:53,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:16:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:53,193 INFO L85 PathProgramCache]: Analyzing trace with hash 17210783, now seen corresponding path program 1 times [2022-11-22 02:16:53,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:53,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022619898] [2022-11-22 02:16:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:53,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:53,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:53,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022619898] [2022-11-22 02:16:53,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022619898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:53,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:53,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 02:16:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566178446] [2022-11-22 02:16:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:53,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:16:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:16:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:16:53,716 INFO L87 Difference]: Start difference. First operand 2326 states and 3299 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:55,206 INFO L93 Difference]: Finished difference Result 4009 states and 5726 transitions. [2022-11-22 02:16:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:16:55,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-22 02:16:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:55,220 INFO L225 Difference]: With dead ends: 4009 [2022-11-22 02:16:55,221 INFO L226 Difference]: Without dead ends: 3558 [2022-11-22 02:16:55,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:16:55,223 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1109 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:55,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1109 Valid, 926 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:16:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2022-11-22 02:16:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 2862. [2022-11-22 02:16:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 1.411744145403705) internal successors, (4039), 2861 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) [2022-11-22 02:16:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 4039 transitions. [2022-11-22 02:16:55,844 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 4039 transitions. Word has length 44 [2022-11-22 02:16:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:55,845 INFO L495 AbstractCegarLoop]: Abstraction has 2862 states and 4039 transitions. [2022-11-22 02:16:55,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 4039 transitions. [2022-11-22 02:16:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:16:55,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:55,846 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] [2022-11-22 02:16:55,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:16:55,847 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:16:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1473188223, now seen corresponding path program 1 times [2022-11-22 02:16:55,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:55,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920056637] [2022-11-22 02:16:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:55,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:56,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:56,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920056637] [2022-11-22 02:16:56,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920056637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:56,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:56,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 02:16:56,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324735773] [2022-11-22 02:16:56,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:56,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:16:56,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:16:56,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:16:56,287 INFO L87 Difference]: Start difference. First operand 2862 states and 4039 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:57,946 INFO L93 Difference]: Finished difference Result 4485 states and 6341 transitions. [2022-11-22 02:16:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:16:57,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-22 02:16:57,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:57,961 INFO L225 Difference]: With dead ends: 4485 [2022-11-22 02:16:57,961 INFO L226 Difference]: Without dead ends: 4332 [2022-11-22 02:16:57,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:16:57,964 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1004 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:57,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 998 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:16:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2022-11-22 02:16:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3283. [2022-11-22 02:16:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3283 states, 3282 states have (on average 1.408897014015844) internal successors, (4624), 3282 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3283 states to 3283 states and 4624 transitions. [2022-11-22 02:16:58,489 INFO L78 Accepts]: Start accepts. Automaton has 3283 states and 4624 transitions. Word has length 44 [2022-11-22 02:16:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:58,489 INFO L495 AbstractCegarLoop]: Abstraction has 3283 states and 4624 transitions. [2022-11-22 02:16:58,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:16:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3283 states and 4624 transitions. [2022-11-22 02:16:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:16:58,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:58,491 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] [2022-11-22 02:16:58,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:16:58,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:16:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:58,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1321244211, now seen corresponding path program 1 times [2022-11-22 02:16:58,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:58,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554863510] [2022-11-22 02:16:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:58,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:59,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554863510] [2022-11-22 02:16:59,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554863510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:59,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:59,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 02:16:59,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432714168] [2022-11-22 02:16:59,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:59,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:16:59,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:16:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:16:59,019 INFO L87 Difference]: Start difference. First operand 3283 states and 4624 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:00,917 INFO L93 Difference]: Finished difference Result 7672 states and 10846 transitions. [2022-11-22 02:17:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:17:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-11-22 02:17:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:00,943 INFO L225 Difference]: With dead ends: 7672 [2022-11-22 02:17:00,944 INFO L226 Difference]: Without dead ends: 6794 [2022-11-22 02:17:00,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:17:00,948 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 516 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:00,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 1520 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:17:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2022-11-22 02:17:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 4525. [2022-11-22 02:17:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 1.4140141467727674) internal successors, (6397), 4524 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 6397 transitions. [2022-11-22 02:17:01,933 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 6397 transitions. Word has length 46 [2022-11-22 02:17:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:01,934 INFO L495 AbstractCegarLoop]: Abstraction has 4525 states and 6397 transitions. [2022-11-22 02:17:01,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 6397 transitions. [2022-11-22 02:17:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:17:01,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:01,935 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] [2022-11-22 02:17:01,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:17:01,936 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:01,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1517745645, now seen corresponding path program 1 times [2022-11-22 02:17:01,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:01,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983476884] [2022-11-22 02:17:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:01,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:02,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983476884] [2022-11-22 02:17:02,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983476884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:02,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:02,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 02:17:02,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65025951] [2022-11-22 02:17:02,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:02,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:17:02,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:02,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:17:02,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:17:02,433 INFO L87 Difference]: Start difference. First operand 4525 states and 6397 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:04,140 INFO L93 Difference]: Finished difference Result 6870 states and 9702 transitions. [2022-11-22 02:17:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:17:04,140 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-11-22 02:17:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:04,161 INFO L225 Difference]: With dead ends: 6870 [2022-11-22 02:17:04,161 INFO L226 Difference]: Without dead ends: 6212 [2022-11-22 02:17:04,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:17:04,165 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 415 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:04,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 959 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:17:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2022-11-22 02:17:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 4552. [2022-11-22 02:17:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4552 states, 4551 states have (on average 1.4115578993627773) internal successors, (6424), 4551 states have internal predecessors, (6424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4552 states to 4552 states and 6424 transitions. [2022-11-22 02:17:04,931 INFO L78 Accepts]: Start accepts. Automaton has 4552 states and 6424 transitions. Word has length 46 [2022-11-22 02:17:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:04,931 INFO L495 AbstractCegarLoop]: Abstraction has 4552 states and 6424 transitions. [2022-11-22 02:17:04,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4552 states and 6424 transitions. [2022-11-22 02:17:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:17:04,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:04,933 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] [2022-11-22 02:17:04,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:17:04,933 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:04,934 INFO L85 PathProgramCache]: Analyzing trace with hash -356991501, now seen corresponding path program 1 times [2022-11-22 02:17:04,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:04,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673278281] [2022-11-22 02:17:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:04,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:05,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673278281] [2022-11-22 02:17:05,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673278281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:05,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:05,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-22 02:17:05,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858320536] [2022-11-22 02:17:05,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:05,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:17:05,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:05,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:17:05,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:17:05,445 INFO L87 Difference]: Start difference. First operand 4552 states and 6424 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:07,695 INFO L93 Difference]: Finished difference Result 8179 states and 11541 transitions. [2022-11-22 02:17:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:17:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-11-22 02:17:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:07,717 INFO L225 Difference]: With dead ends: 8179 [2022-11-22 02:17:07,718 INFO L226 Difference]: Without dead ends: 8033 [2022-11-22 02:17:07,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:17:07,721 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 528 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:07,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1314 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:17:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2022-11-22 02:17:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 4555. [2022-11-22 02:17:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 1.4112867808519982) internal successors, (6427), 4554 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 6427 transitions. [2022-11-22 02:17:08,405 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 6427 transitions. Word has length 46 [2022-11-22 02:17:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:08,405 INFO L495 AbstractCegarLoop]: Abstraction has 4555 states and 6427 transitions. [2022-11-22 02:17:08,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 6427 transitions. [2022-11-22 02:17:08,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:17:08,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:08,407 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] [2022-11-22 02:17:08,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 02:17:08,407 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash 663075271, now seen corresponding path program 1 times [2022-11-22 02:17:08,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:08,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630479354] [2022-11-22 02:17:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:08,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:08,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:08,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630479354] [2022-11-22 02:17:08,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630479354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:08,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:08,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:08,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147049336] [2022-11-22 02:17:08,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:08,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:08,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:08,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:08,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:08,450 INFO L87 Difference]: Start difference. First operand 4555 states and 6427 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:09,334 INFO L93 Difference]: Finished difference Result 8114 states and 11520 transitions. [2022-11-22 02:17:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:09,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-11-22 02:17:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:09,343 INFO L225 Difference]: With dead ends: 8114 [2022-11-22 02:17:09,343 INFO L226 Difference]: Without dead ends: 4265 [2022-11-22 02:17:09,348 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 [2022-11-22 02:17:09,349 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 83 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:09,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 260 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:17:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4265 states. [2022-11-22 02:17:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4265 to 4261. [2022-11-22 02:17:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4261 states, 4260 states have (on average 1.4105633802816901) internal successors, (6009), 4260 states have internal predecessors, (6009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 6009 transitions. [2022-11-22 02:17:10,097 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 6009 transitions. Word has length 47 [2022-11-22 02:17:10,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:10,097 INFO L495 AbstractCegarLoop]: Abstraction has 4261 states and 6009 transitions. [2022-11-22 02:17:10,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 6009 transitions. [2022-11-22 02:17:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:17:10,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:10,099 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] [2022-11-22 02:17:10,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:17:10,099 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:10,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2091887612, now seen corresponding path program 1 times [2022-11-22 02:17:10,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:10,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62538512] [2022-11-22 02:17:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:10,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:10,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:10,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62538512] [2022-11-22 02:17:10,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62538512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:10,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:10,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:10,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453044313] [2022-11-22 02:17:10,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:10,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:10,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:10,152 INFO L87 Difference]: Start difference. First operand 4261 states and 6009 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:11,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:11,030 INFO L93 Difference]: Finished difference Result 7555 states and 10705 transitions. [2022-11-22 02:17:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:11,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-11-22 02:17:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:11,038 INFO L225 Difference]: With dead ends: 7555 [2022-11-22 02:17:11,039 INFO L226 Difference]: Without dead ends: 4028 [2022-11-22 02:17:11,044 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 [2022-11-22 02:17:11,044 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 76 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:11,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 260 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:17:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2022-11-22 02:17:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 3934. [2022-11-22 02:17:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3934 states, 3933 states have (on average 1.4078311721332317) internal successors, (5537), 3933 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 5537 transitions. [2022-11-22 02:17:11,610 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 5537 transitions. Word has length 47 [2022-11-22 02:17:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:11,610 INFO L495 AbstractCegarLoop]: Abstraction has 3934 states and 5537 transitions. [2022-11-22 02:17:11,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 5537 transitions. [2022-11-22 02:17:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:17:11,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:11,611 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] [2022-11-22 02:17:11,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:17:11,611 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1311317625, now seen corresponding path program 1 times [2022-11-22 02:17:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:11,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637464221] [2022-11-22 02:17:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:11,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:16,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:16,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637464221] [2022-11-22 02:17:16,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637464221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:16,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:16,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-22 02:17:16,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693656890] [2022-11-22 02:17:16,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:17:16,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:17:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:17:16,289 INFO L87 Difference]: Start difference. First operand 3934 states and 5537 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:24,973 INFO L93 Difference]: Finished difference Result 5869 states and 8247 transitions. [2022-11-22 02:17:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 02:17:24,974 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2022-11-22 02:17:24,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:24,988 INFO L225 Difference]: With dead ends: 5869 [2022-11-22 02:17:24,988 INFO L226 Difference]: Without dead ends: 5163 [2022-11-22 02:17:24,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=616, Invalid=1834, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:17:24,992 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 556 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:24,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1195 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 02:17:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2022-11-22 02:17:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 3912. [2022-11-22 02:17:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 1.4093582204039887) internal successors, (5512), 3911 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 5512 transitions. [2022-11-22 02:17:25,772 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 5512 transitions. Word has length 48 [2022-11-22 02:17:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:25,772 INFO L495 AbstractCegarLoop]: Abstraction has 3912 states and 5512 transitions. [2022-11-22 02:17:25,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:25,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 5512 transitions. [2022-11-22 02:17:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:17:25,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:25,774 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] [2022-11-22 02:17:25,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:17:25,774 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash 650779773, now seen corresponding path program 1 times [2022-11-22 02:17:25,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:25,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198448647] [2022-11-22 02:17:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:25,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:25,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:25,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198448647] [2022-11-22 02:17:25,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198448647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:25,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:25,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959440330] [2022-11-22 02:17:25,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:25,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:25,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:25,887 INFO L87 Difference]: Start difference. First operand 3912 states and 5512 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:26,984 INFO L93 Difference]: Finished difference Result 7531 states and 10654 transitions. [2022-11-22 02:17:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:26,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-11-22 02:17:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:26,993 INFO L225 Difference]: With dead ends: 7531 [2022-11-22 02:17:26,993 INFO L226 Difference]: Without dead ends: 4774 [2022-11-22 02:17:26,998 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 [2022-11-22 02:17:26,999 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 79 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:27,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 285 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:17:27,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2022-11-22 02:17:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 4430. [2022-11-22 02:17:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4429 states have (on average 1.400090313840596) internal successors, (6201), 4429 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6201 transitions. [2022-11-22 02:17:27,932 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6201 transitions. Word has length 52 [2022-11-22 02:17:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:27,932 INFO L495 AbstractCegarLoop]: Abstraction has 4430 states and 6201 transitions. [2022-11-22 02:17:27,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6201 transitions. [2022-11-22 02:17:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 02:17:27,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:27,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:27,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 02:17:27,934 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:27,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1495665432, now seen corresponding path program 1 times [2022-11-22 02:17:27,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:27,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461967972] [2022-11-22 02:17:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:27,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:27,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:27,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461967972] [2022-11-22 02:17:27,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461967972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:27,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:27,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:27,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938487804] [2022-11-22 02:17:27,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:27,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:27,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:27,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:27,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:27,991 INFO L87 Difference]: Start difference. First operand 4430 states and 6201 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:28,956 INFO L93 Difference]: Finished difference Result 7276 states and 10190 transitions. [2022-11-22 02:17:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-22 02:17:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:28,963 INFO L225 Difference]: With dead ends: 7276 [2022-11-22 02:17:28,963 INFO L226 Difference]: Without dead ends: 3781 [2022-11-22 02:17:28,968 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 [2022-11-22 02:17:28,968 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 70 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:28,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 289 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:17:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2022-11-22 02:17:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 3779. [2022-11-22 02:17:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 3778 states have (on average 1.3795659078877713) internal successors, (5212), 3778 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 5212 transitions. [2022-11-22 02:17:29,785 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 5212 transitions. Word has length 55 [2022-11-22 02:17:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:29,785 INFO L495 AbstractCegarLoop]: Abstraction has 3779 states and 5212 transitions. [2022-11-22 02:17:29,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 5212 transitions. [2022-11-22 02:17:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 02:17:29,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:29,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:29,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 02:17:29,787 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:29,788 INFO L85 PathProgramCache]: Analyzing trace with hash -521757432, now seen corresponding path program 1 times [2022-11-22 02:17:29,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:29,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424816224] [2022-11-22 02:17:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:29,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:29,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:29,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424816224] [2022-11-22 02:17:29,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424816224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:29,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:29,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209422791] [2022-11-22 02:17:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:29,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:29,881 INFO L87 Difference]: Start difference. First operand 3779 states and 5212 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:31,062 INFO L93 Difference]: Finished difference Result 8373 states and 11630 transitions. [2022-11-22 02:17:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:31,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-22 02:17:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:31,073 INFO L225 Difference]: With dead ends: 8373 [2022-11-22 02:17:31,073 INFO L226 Difference]: Without dead ends: 5304 [2022-11-22 02:17:31,079 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 [2022-11-22 02:17:31,079 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 75 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:31,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 268 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:17:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2022-11-22 02:17:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4703. [2022-11-22 02:17:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 1.365801786473841) internal successors, (6422), 4702 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 6422 transitions. [2022-11-22 02:17:32,081 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 6422 transitions. Word has length 55 [2022-11-22 02:17:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:32,082 INFO L495 AbstractCegarLoop]: Abstraction has 4703 states and 6422 transitions. [2022-11-22 02:17:32,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 6422 transitions. [2022-11-22 02:17:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 02:17:32,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:32,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:32,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 02:17:32,084 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:32,085 INFO L85 PathProgramCache]: Analyzing trace with hash 109988161, now seen corresponding path program 1 times [2022-11-22 02:17:32,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:32,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697311808] [2022-11-22 02:17:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:32,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:32,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:32,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697311808] [2022-11-22 02:17:32,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697311808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:32,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:32,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:32,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160485674] [2022-11-22 02:17:32,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:32,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:32,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:32,135 INFO L87 Difference]: Start difference. First operand 4703 states and 6422 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:33,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:33,261 INFO L93 Difference]: Finished difference Result 6995 states and 9557 transitions. [2022-11-22 02:17:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:33,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-22 02:17:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:33,267 INFO L225 Difference]: With dead ends: 6995 [2022-11-22 02:17:33,267 INFO L226 Difference]: Without dead ends: 4971 [2022-11-22 02:17:33,272 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 [2022-11-22 02:17:33,272 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 71 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:33,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 302 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:17:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2022-11-22 02:17:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 4969. [2022-11-22 02:17:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 1.3526570048309179) internal successors, (6720), 4968 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 6720 transitions. [2022-11-22 02:17:34,363 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 6720 transitions. Word has length 58 [2022-11-22 02:17:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:34,364 INFO L495 AbstractCegarLoop]: Abstraction has 4969 states and 6720 transitions. [2022-11-22 02:17:34,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 6720 transitions. [2022-11-22 02:17:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 02:17:34,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:34,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:34,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 02:17:34,366 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:34,366 INFO L85 PathProgramCache]: Analyzing trace with hash 269382945, now seen corresponding path program 1 times [2022-11-22 02:17:34,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:34,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803753007] [2022-11-22 02:17:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:34,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:34,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:34,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803753007] [2022-11-22 02:17:34,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803753007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:34,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:34,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:34,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971004632] [2022-11-22 02:17:34,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:34,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:34,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:34,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:34,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:34,458 INFO L87 Difference]: Start difference. First operand 4969 states and 6720 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:35,986 INFO L93 Difference]: Finished difference Result 11809 states and 16064 transitions. [2022-11-22 02:17:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-22 02:17:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:35,996 INFO L225 Difference]: With dead ends: 11809 [2022-11-22 02:17:35,996 INFO L226 Difference]: Without dead ends: 7199 [2022-11-22 02:17:36,001 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 [2022-11-22 02:17:36,001 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 70 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:36,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 249 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:17:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2022-11-22 02:17:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 6525. [2022-11-22 02:17:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6524 states have (on average 1.3412017167381973) internal successors, (8750), 6524 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 8750 transitions. [2022-11-22 02:17:37,319 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 8750 transitions. Word has length 58 [2022-11-22 02:17:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:37,319 INFO L495 AbstractCegarLoop]: Abstraction has 6525 states and 8750 transitions. [2022-11-22 02:17:37,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:37,320 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 8750 transitions. [2022-11-22 02:17:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 02:17:37,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:37,320 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] [2022-11-22 02:17:37,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 02:17:37,321 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash -963622959, now seen corresponding path program 1 times [2022-11-22 02:17:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:37,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892782534] [2022-11-22 02:17:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:37,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:37,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892782534] [2022-11-22 02:17:37,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892782534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:37,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:37,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:17:37,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908220262] [2022-11-22 02:17:37,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:37,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:17:37,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:37,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:17:37,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:17:37,560 INFO L87 Difference]: Start difference. First operand 6525 states and 8750 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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) [2022-11-22 02:17:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:39,735 INFO L93 Difference]: Finished difference Result 9076 states and 12095 transitions. [2022-11-22 02:17:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:17:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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 [2022-11-22 02:17:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:39,745 INFO L225 Difference]: With dead ends: 9076 [2022-11-22 02:17:39,745 INFO L226 Difference]: Without dead ends: 9074 [2022-11-22 02:17:39,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:17:39,749 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 330 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:39,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 723 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:17:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9074 states. [2022-11-22 02:17:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9074 to 7931. [2022-11-22 02:17:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 1.3359394703657) internal successors, (10594), 7930 states have internal predecessors, (10594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 10594 transitions. [2022-11-22 02:17:41,299 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 10594 transitions. Word has length 63 [2022-11-22 02:17:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:41,300 INFO L495 AbstractCegarLoop]: Abstraction has 7931 states and 10594 transitions. [2022-11-22 02:17:41,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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) [2022-11-22 02:17:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 10594 transitions. [2022-11-22 02:17:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:17:41,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:41,302 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:17:41,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 02:17:41,303 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:41,303 INFO L85 PathProgramCache]: Analyzing trace with hash -718661213, now seen corresponding path program 1 times [2022-11-22 02:17:41,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:41,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791942686] [2022-11-22 02:17:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:41,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:17:41,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:41,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791942686] [2022-11-22 02:17:41,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791942686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:41,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:41,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:17:41,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505816821] [2022-11-22 02:17:41,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:41,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:17:41,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:17:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:17:41,512 INFO L87 Difference]: Start difference. First operand 7931 states and 10594 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:44,684 INFO L93 Difference]: Finished difference Result 19136 states and 25626 transitions. [2022-11-22 02:17:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:17:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-22 02:17:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:44,700 INFO L225 Difference]: With dead ends: 19136 [2022-11-22 02:17:44,700 INFO L226 Difference]: Without dead ends: 11884 [2022-11-22 02:17:44,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:17:44,710 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 777 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:44,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 262 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:17:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11884 states. [2022-11-22 02:17:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11884 to 9115. [2022-11-22 02:17:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9115 states, 9114 states have (on average 1.3128154487601493) internal successors, (11965), 9114 states have internal predecessors, (11965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 11965 transitions. [2022-11-22 02:17:46,907 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 11965 transitions. Word has length 71 [2022-11-22 02:17:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:46,907 INFO L495 AbstractCegarLoop]: Abstraction has 9115 states and 11965 transitions. [2022-11-22 02:17:46,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 11965 transitions. [2022-11-22 02:17:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:17:46,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:46,910 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:17:46,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 02:17:46,910 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:46,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1684113144, now seen corresponding path program 1 times [2022-11-22 02:17:46,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:46,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580229817] [2022-11-22 02:17:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:46,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:48,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:48,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580229817] [2022-11-22 02:17:48,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580229817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:17:48,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99243799] [2022-11-22 02:17:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:48,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:48,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:48,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:17:48,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:17:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-22 02:17:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:17:50,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:17:50,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99243799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:50,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:17:50,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [20] total 34 [2022-11-22 02:17:50,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995105785] [2022-11-22 02:17:50,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:50,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:17:50,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:50,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:17:50,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:17:50,804 INFO L87 Difference]: Start difference. First operand 9115 states and 11965 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:57,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:57,476 INFO L93 Difference]: Finished difference Result 17757 states and 23342 transitions. [2022-11-22 02:17:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:17:57,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 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 71 [2022-11-22 02:17:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:57,492 INFO L225 Difference]: With dead ends: 17757 [2022-11-22 02:17:57,492 INFO L226 Difference]: Without dead ends: 13610 [2022-11-22 02:17:57,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=344, Invalid=2008, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 02:17:57,500 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 1771 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1771 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:57,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1771 Valid, 927 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:17:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2022-11-22 02:18:00,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 10308. [2022-11-22 02:18:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10308 states, 10307 states have (on average 1.3107596778888135) internal successors, (13510), 10307 states have internal predecessors, (13510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10308 states to 10308 states and 13510 transitions. [2022-11-22 02:18:00,103 INFO L78 Accepts]: Start accepts. Automaton has 10308 states and 13510 transitions. Word has length 71 [2022-11-22 02:18:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:00,103 INFO L495 AbstractCegarLoop]: Abstraction has 10308 states and 13510 transitions. [2022-11-22 02:18:00,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 10308 states and 13510 transitions. [2022-11-22 02:18:00,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:18:00,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:00,106 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:18:00,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:00,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:00,318 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:00,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1154891663, now seen corresponding path program 1 times [2022-11-22 02:18:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:00,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219079402] [2022-11-22 02:18:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:00,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:18:00,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219079402] [2022-11-22 02:18:00,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219079402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:00,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:18:00,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:18:00,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55740941] [2022-11-22 02:18:00,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:00,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:18:00,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:18:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:18:00,541 INFO L87 Difference]: Start difference. First operand 10308 states and 13510 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:05,854 INFO L93 Difference]: Finished difference Result 26021 states and 34285 transitions. [2022-11-22 02:18:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:18:05,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 71 [2022-11-22 02:18:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:05,878 INFO L225 Difference]: With dead ends: 26021 [2022-11-22 02:18:05,878 INFO L226 Difference]: Without dead ends: 18060 [2022-11-22 02:18:05,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:18:05,888 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 1006 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:05,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 221 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:18:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18060 states. [2022-11-22 02:18:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18060 to 13328. [2022-11-22 02:18:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13328 states, 13327 states have (on average 1.2982666766714188) internal successors, (17302), 13327 states have internal predecessors, (17302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13328 states to 13328 states and 17302 transitions. [2022-11-22 02:18:10,787 INFO L78 Accepts]: Start accepts. Automaton has 13328 states and 17302 transitions. Word has length 71 [2022-11-22 02:18:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:10,787 INFO L495 AbstractCegarLoop]: Abstraction has 13328 states and 17302 transitions. [2022-11-22 02:18:10,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 13328 states and 17302 transitions. [2022-11-22 02:18:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:18:10,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:10,791 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:18:10,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-22 02:18:10,791 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:10,791 INFO L85 PathProgramCache]: Analyzing trace with hash -631859732, now seen corresponding path program 1 times [2022-11-22 02:18:10,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:10,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995765336] [2022-11-22 02:18:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:10,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:11,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:11,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995765336] [2022-11-22 02:18:11,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995765336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:11,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567494185] [2022-11-22 02:18:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:11,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:11,685 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:11,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:18:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:11,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-22 02:18:11,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:18:16,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:16,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567494185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:16,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:16,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [14] total 35 [2022-11-22 02:18:16,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252036158] [2022-11-22 02:18:16,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 02:18:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 02:18:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:18:16,281 INFO L87 Difference]: Start difference. First operand 13328 states and 17302 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:21,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:21,543 INFO L93 Difference]: Finished difference Result 17712 states and 23029 transitions. [2022-11-22 02:18:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 02:18:21,544 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 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 71 [2022-11-22 02:18:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:21,560 INFO L225 Difference]: With dead ends: 17712 [2022-11-22 02:18:21,561 INFO L226 Difference]: Without dead ends: 13342 [2022-11-22 02:18:21,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:18:21,567 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 329 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:21,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 495 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:18:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13342 states. [2022-11-22 02:18:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13342 to 13331. [2022-11-22 02:18:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13331 states, 13330 states have (on average 1.2981995498874719) internal successors, (17305), 13330 states have internal predecessors, (17305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13331 states to 13331 states and 17305 transitions. [2022-11-22 02:18:25,812 INFO L78 Accepts]: Start accepts. Automaton has 13331 states and 17305 transitions. Word has length 71 [2022-11-22 02:18:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:25,812 INFO L495 AbstractCegarLoop]: Abstraction has 13331 states and 17305 transitions. [2022-11-22 02:18:25,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 13331 states and 17305 transitions. [2022-11-22 02:18:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:18:25,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:25,815 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:18:25,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:26,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 02:18:26,021 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:26,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1064558264, now seen corresponding path program 1 times [2022-11-22 02:18:26,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:26,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732070441] [2022-11-22 02:18:26,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:26,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:26,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:26,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732070441] [2022-11-22 02:18:26,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732070441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:26,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550075966] [2022-11-22 02:18:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:26,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:26,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:26,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:26,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:18:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:27,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-22 02:18:27,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:18:28,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:28,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550075966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:28,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:18:28,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 27 [2022-11-22 02:18:28,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336241704] [2022-11-22 02:18:28,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:28,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:18:28,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:18:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:18:28,411 INFO L87 Difference]: Start difference. First operand 13331 states and 17305 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:33,604 INFO L93 Difference]: Finished difference Result 19614 states and 25632 transitions. [2022-11-22 02:18:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:18:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-22 02:18:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:33,625 INFO L225 Difference]: With dead ends: 19614 [2022-11-22 02:18:33,625 INFO L226 Difference]: Without dead ends: 14841 [2022-11-22 02:18:33,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:18:33,630 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 469 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:33,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 706 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:18:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14841 states. [2022-11-22 02:18:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14841 to 14149. [2022-11-22 02:18:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14149 states, 14148 states have (on average 1.3021628498727735) internal successors, (18423), 14148 states have internal predecessors, (18423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14149 states to 14149 states and 18423 transitions. [2022-11-22 02:18:37,955 INFO L78 Accepts]: Start accepts. Automaton has 14149 states and 18423 transitions. Word has length 71 [2022-11-22 02:18:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:37,955 INFO L495 AbstractCegarLoop]: Abstraction has 14149 states and 18423 transitions. [2022-11-22 02:18:37,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:37,955 INFO L276 IsEmpty]: Start isEmpty. Operand 14149 states and 18423 transitions. [2022-11-22 02:18:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:18:37,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:37,960 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:18:37,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:38,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 02:18:38,166 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash 799527002, now seen corresponding path program 1 times [2022-11-22 02:18:38,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:38,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064192094] [2022-11-22 02:18:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:38,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:18:38,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:38,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064192094] [2022-11-22 02:18:38,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064192094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:38,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:18:38,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:18:38,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295876236] [2022-11-22 02:18:38,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:38,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:18:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:18:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:18:38,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:18:38,220 INFO L87 Difference]: Start difference. First operand 14149 states and 18423 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:42,819 INFO L93 Difference]: Finished difference Result 16408 states and 21329 transitions. [2022-11-22 02:18:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:18:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-22 02:18:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:42,836 INFO L225 Difference]: With dead ends: 16408 [2022-11-22 02:18:42,836 INFO L226 Difference]: Without dead ends: 13664 [2022-11-22 02:18:42,839 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 [2022-11-22 02:18:42,840 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 72 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:42,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 257 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:18:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13664 states. [2022-11-22 02:18:47,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13664 to 13575. [2022-11-22 02:18:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13575 states, 13574 states have (on average 1.2940179755414765) internal successors, (17565), 13574 states have internal predecessors, (17565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13575 states to 13575 states and 17565 transitions. [2022-11-22 02:18:47,701 INFO L78 Accepts]: Start accepts. Automaton has 13575 states and 17565 transitions. Word has length 73 [2022-11-22 02:18:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:47,701 INFO L495 AbstractCegarLoop]: Abstraction has 13575 states and 17565 transitions. [2022-11-22 02:18:47,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:47,701 INFO L276 IsEmpty]: Start isEmpty. Operand 13575 states and 17565 transitions. [2022-11-22 02:18:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 02:18:47,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:47,704 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:18:47,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-22 02:18:47,704 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:47,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1518939580, now seen corresponding path program 1 times [2022-11-22 02:18:47,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:18:47,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417542394] [2022-11-22 02:18:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:47,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:18:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:48,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:18:48,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417542394] [2022-11-22 02:18:48,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417542394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881120780] [2022-11-22 02:18:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:48,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:48,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:48,988 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:49,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7ba43c-3371-4b91-a27f-c4330b95fe99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:18:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:49,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-22 02:18:49,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:56,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:22:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:22:19,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881120780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:22:19,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084559511] [2022-11-22 02:22:19,602 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-22 02:22:19,603 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:22:19,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:22:19,614 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:22:19,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:22:19,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:19,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:22:19,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-22 02:22:19,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:22:19,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-22 02:22:29,972 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:23:14,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '591735#(and (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1| 127) (or (not (<= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (and (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (not (< (mod ~r1~0 256) 3)))) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~2#1|) (<= 0 ~mode1~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= ~__return_6326~0 1) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_3~0#1|) (<= 1 ~__return_6326~0) (<= 0 ~id1~0) (= |ULTIMATE.start_main_~check__tmp~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~2#1| 1)) (= ~p2~0 0) (<= 1 ~r1~0) (<= 0 ~mode3~0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~1#1| 1)) (= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send1~0 127) (<= ~st1~0 0) (= ~p3_new~0 ~nomsg~0) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_6532~0) (<= 0 (+ ~p3_old~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~2#1| 256) 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= ~r1~0 257) (<= 0 ~st2~0) (<= ~mode3~0 1) (= ~__return_6719~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 1 ~__return_6404~0) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~__return_6404~0 1) (<= (+ |ULTIMATE.start_main_~node1__m1~2#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~1#1| 1) 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= 0 ~mode2~0) (<= (+ |ULTIMATE.start_main_~node1__m1~1#1| 1) 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (= |ULTIMATE.start_main_~assert__arg~2#1| |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~check__tmp~2#1| ~__return_6532~0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~1#1| 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= 1 ~__return_6465~0) (<= ~__return_6465~0 1) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-22 02:23:14,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:23:14,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:23:14,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 28] total 71 [2022-11-22 02:23:14,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448508251] [2022-11-22 02:23:14,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:23:14,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-22 02:23:14,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:14,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-22 02:23:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2263, Invalid=12989, Unknown=0, NotChecked=0, Total=15252 [2022-11-22 02:23:14,671 INFO L87 Difference]: Start difference. First operand 13575 states and 17565 transitions. Second operand has 71 states, 71 states have (on average 3.084507042253521) internal successors, (219), 71 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:20,400 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 396 DAG size of output: 310 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:23:29,073 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 397 DAG size of output: 276 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:24:42,385 WARN L233 SmtUtils]: Spent 13.30s on a formula simplification. DAG size of input: 702 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:24:50,361 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 618 DAG size of output: 514 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:24:59,642 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 420 DAG size of output: 331 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:25:14,597 WARN L233 SmtUtils]: Spent 11.76s on a formula simplification. DAG size of input: 646 DAG size of output: 527 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:25:31,921 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 512 DAG size of output: 426 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:25:43,889 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 484 DAG size of output: 468 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:25:53,750 WARN L233 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 406 DAG size of output: 381 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:26:02,017 WARN L233 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 549 DAG size of output: 525 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:26:12,660 WARN L233 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 474 DAG size of output: 452 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:26:54,514 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 481 DAG size of output: 379 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:27:05,854 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 455 DAG size of output: 440 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:27:16,561 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 466 DAG size of output: 425 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:27:36,216 WARN L233 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 408 DAG size of output: 383 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:27:45,452 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 459 DAG size of output: 434 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:28:00,014 WARN L233 SmtUtils]: Spent 13.14s on a formula simplification. DAG size of input: 619 DAG size of output: 582 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:28:47,570 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 500 DAG size of output: 478 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:28:58,968 WARN L233 SmtUtils]: Spent 10.89s on a formula simplification. DAG size of input: 620 DAG size of output: 495 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:29:20,901 WARN L233 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 497 DAG size of output: 405 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:29:49,696 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 474 DAG size of output: 340 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:19,456 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 415 DAG size of output: 373 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:26,360 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 438 DAG size of output: 356 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)