./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/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_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/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_7c7e825c-2044-4197-bb20-8d420a7aa396/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 3fcf713e89fe507946e50cd7ac5d1f3269c91b4606b9da766f31c3632a8650aa --- 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 00:06:41,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:06:41,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:06:41,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:06:41,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:06:41,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:06:41,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:06:41,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:06:41,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:06:41,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:06:41,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:06:41,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:06:41,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:06:41,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:06:41,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:06:41,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:06:41,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:06:41,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:06:41,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:06:41,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:06:41,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:06:41,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:06:41,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:06:41,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:06:41,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:06:41,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:06:41,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:06:41,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:06:41,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:06:41,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:06:41,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:06:41,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:06:41,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:06:41,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:06:41,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:06:41,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:06:41,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:06:41,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:06:41,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:06:41,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:06:41,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:06:41,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:06:41,803 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:06:41,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:06:41,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:06:41,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:06:41,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:06:41,805 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:06:41,805 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:06:41,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:06:41,806 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:06:41,806 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:06:41,810 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:06:41,810 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:06:41,811 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:06:41,811 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:06:41,811 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:06:41,811 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:06:41,811 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:06:41,812 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:06:41,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:06:41,814 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:06:41,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:06:41,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:06:41,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:06:41,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:06:41,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:06:41,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:06:41,818 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:06:41,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:06:41,819 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:06:41,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:06:41,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:06:41,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:06:41,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:06:41,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:06:41,821 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:06:41,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:06:41,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:06:41,823 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:06:41,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:06:41,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:06:41,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:06:41,824 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_7c7e825c-2044-4197-bb20-8d420a7aa396/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fcf713e89fe507946e50cd7ac5d1f3269c91b4606b9da766f31c3632a8650aa [2022-11-22 00:06:42,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:06:42,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:06:42,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:06:42,131 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:06:42,132 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:06:42,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 00:06:45,352 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:06:45,595 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:06:45,596 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 00:06:45,609 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/data/02715abaa/1407bb48a1f348dba1cb0fd659b8ed4c/FLAG2819cd245 [2022-11-22 00:06:45,634 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/data/02715abaa/1407bb48a1f348dba1cb0fd659b8ed4c [2022-11-22 00:06:45,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:06:45,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:06:45,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:06:45,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:06:45,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:06:45,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:06:45" (1/1) ... [2022-11-22 00:06:45,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb0624f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:45, skipping insertion in model container [2022-11-22 00:06:45,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:06:45" (1/1) ... [2022-11-22 00:06:45,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:06:45,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:06:46,033 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_7c7e825c-2044-4197-bb20-8d420a7aa396/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12650,12663] [2022-11-22 00:06:46,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:06:46,185 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:06:46,302 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_7c7e825c-2044-4197-bb20-8d420a7aa396/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12650,12663] [2022-11-22 00:06:46,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:06:46,407 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:06:46,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46 WrapperNode [2022-11-22 00:06:46,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:06:46,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:06:46,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:06:46,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:06:46,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,515 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1261 [2022-11-22 00:06:46,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:06:46,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:06:46,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:06:46,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:06:46,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:06:46,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:06:46,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:06:46,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:06:46,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (1/1) ... [2022-11-22 00:06:46,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:06:46,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:06:46,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:06:46,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:06:46,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:06:46,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:06:46,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:06:46,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:06:46,914 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:06:46,916 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:06:48,070 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:06:48,453 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:06:48,453 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 00:06:48,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:06:48 BoogieIcfgContainer [2022-11-22 00:06:48,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:06:48,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:06:48,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:06:48,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:06:48,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:06:45" (1/3) ... [2022-11-22 00:06:48,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28adac71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:06:48, skipping insertion in model container [2022-11-22 00:06:48,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:46" (2/3) ... [2022-11-22 00:06:48,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28adac71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:06:48, skipping insertion in model container [2022-11-22 00:06:48,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:06:48" (3/3) ... [2022-11-22 00:06:48,469 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 00:06:48,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:06:48,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:06:48,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:06:48,552 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;@18a136ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:06:48,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:06:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 241 states have (on average 1.6639004149377594) internal successors, (401), 242 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 00:06:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-22 00:06:48,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:48,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:48,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1791153164, now seen corresponding path program 1 times [2022-11-22 00:06:48,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:48,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582168174] [2022-11-22 00:06:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:48,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:49,201 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 00:06:49,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:49,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582168174] [2022-11-22 00:06:49,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582168174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:49,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:49,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:06:49,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879132217] [2022-11-22 00:06:49,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:49,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:06:49,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:06:49,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:49,267 INFO L87 Difference]: Start difference. First operand has 243 states, 241 states have (on average 1.6639004149377594) internal successors, (401), 242 states have internal predecessors, (401), 0 states have call successors, (0), 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 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 00:06:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:49,506 INFO L93 Difference]: Finished difference Result 408 states and 666 transitions. [2022-11-22 00:06:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:06:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2022-11-22 00:06:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:49,529 INFO L225 Difference]: With dead ends: 408 [2022-11-22 00:06:49,530 INFO L226 Difference]: Without dead ends: 313 [2022-11-22 00:06:49,533 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 00:06:49,539 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 147 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:49,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 810 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-22 00:06:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2022-11-22 00:06:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.5580645161290323) internal successors, (483), 310 states have internal predecessors, (483), 0 states have call successors, (0), 0 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 00:06:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 483 transitions. [2022-11-22 00:06:49,642 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 483 transitions. Word has length 89 [2022-11-22 00:06:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:49,644 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 483 transitions. [2022-11-22 00:06:49,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 00:06:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 483 transitions. [2022-11-22 00:06:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 00:06:49,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:49,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:49,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:06:49,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash -727100931, now seen corresponding path program 1 times [2022-11-22 00:06:49,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:49,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385963932] [2022-11-22 00:06:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:49,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:49,916 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 00:06:49,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:49,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385963932] [2022-11-22 00:06:49,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385963932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:49,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:49,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:06:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219749103] [2022-11-22 00:06:49,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:49,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:06:49,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:06:49,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:49,920 INFO L87 Difference]: Start difference. First operand 311 states and 483 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 00:06:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:50,129 INFO L93 Difference]: Finished difference Result 559 states and 885 transitions. [2022-11-22 00:06:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:06:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2022-11-22 00:06:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:50,134 INFO L225 Difference]: With dead ends: 559 [2022-11-22 00:06:50,134 INFO L226 Difference]: Without dead ends: 400 [2022-11-22 00:06:50,142 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 00:06:50,146 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 136 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:50,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 643 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-22 00:06:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2022-11-22 00:06:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.5642317380352644) internal successors, (621), 397 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 00:06:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 621 transitions. [2022-11-22 00:06:50,203 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 621 transitions. Word has length 91 [2022-11-22 00:06:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:50,206 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 621 transitions. [2022-11-22 00:06:50,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 00:06:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 621 transitions. [2022-11-22 00:06:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 00:06:50,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:50,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:50,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:06:50,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2006695004, now seen corresponding path program 1 times [2022-11-22 00:06:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:50,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919255744] [2022-11-22 00:06:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:50,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:50,456 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 00:06:50,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:50,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919255744] [2022-11-22 00:06:50,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919255744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:50,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:50,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:06:50,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826669283] [2022-11-22 00:06:50,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:50,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:06:50,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:06:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:50,459 INFO L87 Difference]: Start difference. First operand 398 states and 621 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:50,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:50,611 INFO L93 Difference]: Finished difference Result 837 states and 1332 transitions. [2022-11-22 00:06:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:06:50,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-22 00:06:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:50,617 INFO L225 Difference]: With dead ends: 837 [2022-11-22 00:06:50,617 INFO L226 Difference]: Without dead ends: 592 [2022-11-22 00:06:50,623 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 00:06:50,628 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 136 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:50,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 721 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-22 00:06:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 590. [2022-11-22 00:06:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.5823429541595926) internal successors, (932), 589 states have internal predecessors, (932), 0 states have call successors, (0), 0 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 00:06:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 932 transitions. [2022-11-22 00:06:50,682 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 932 transitions. Word has length 94 [2022-11-22 00:06:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:50,683 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 932 transitions. [2022-11-22 00:06:50,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 932 transitions. [2022-11-22 00:06:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-22 00:06:50,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:50,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:50,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:06:50,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1727106365, now seen corresponding path program 1 times [2022-11-22 00:06:50,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:50,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005608372] [2022-11-22 00:06:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:50,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:50,887 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 00:06:50,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:50,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005608372] [2022-11-22 00:06:50,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005608372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:50,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:50,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:06:50,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782655314] [2022-11-22 00:06:50,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:50,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:06:50,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:50,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:06:50,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:50,891 INFO L87 Difference]: Start difference. First operand 590 states and 932 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:51,070 INFO L93 Difference]: Finished difference Result 1290 states and 2062 transitions. [2022-11-22 00:06:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:06:51,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-11-22 00:06:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:51,076 INFO L225 Difference]: With dead ends: 1290 [2022-11-22 00:06:51,076 INFO L226 Difference]: Without dead ends: 853 [2022-11-22 00:06:51,077 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 00:06:51,084 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 135 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:51,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 659 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:51,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-11-22 00:06:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 851. [2022-11-22 00:06:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.5894117647058823) internal successors, (1351), 850 states have internal predecessors, (1351), 0 states have call successors, (0), 0 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 00:06:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1351 transitions. [2022-11-22 00:06:51,167 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1351 transitions. Word has length 96 [2022-11-22 00:06:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:51,168 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1351 transitions. [2022-11-22 00:06:51,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1351 transitions. [2022-11-22 00:06:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 00:06:51,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:51,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:51,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:06:51,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash -158699486, now seen corresponding path program 1 times [2022-11-22 00:06:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:51,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447173632] [2022-11-22 00:06:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:06:51,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:51,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447173632] [2022-11-22 00:06:51,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447173632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:51,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:51,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:06:51,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385529044] [2022-11-22 00:06:51,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:51,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:06:51,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:06:51,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:51,301 INFO L87 Difference]: Start difference. First operand 851 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 00:06:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:51,581 INFO L93 Difference]: Finished difference Result 2058 states and 3306 transitions. [2022-11-22 00:06:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:06:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2022-11-22 00:06:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:51,587 INFO L225 Difference]: With dead ends: 2058 [2022-11-22 00:06:51,588 INFO L226 Difference]: Without dead ends: 1378 [2022-11-22 00:06:51,589 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 00:06:51,591 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 130 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:51,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 694 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-11-22 00:06:51,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1376. [2022-11-22 00:06:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 1.5978181818181818) internal successors, (2197), 1375 states have internal predecessors, (2197), 0 states have call successors, (0), 0 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 00:06:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 2197 transitions. [2022-11-22 00:06:51,756 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 2197 transitions. Word has length 99 [2022-11-22 00:06:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:51,756 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 2197 transitions. [2022-11-22 00:06:51,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 00:06:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 2197 transitions. [2022-11-22 00:06:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-22 00:06:51,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:51,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:51,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:06:51,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:51,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1123710545, now seen corresponding path program 1 times [2022-11-22 00:06:51,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:51,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390079273] [2022-11-22 00:06:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:51,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:51,916 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 00:06:51,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:51,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390079273] [2022-11-22 00:06:51,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390079273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:51,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:51,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:06:51,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467964803] [2022-11-22 00:06:51,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:51,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:06:51,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:51,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:06:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:51,924 INFO L87 Difference]: Start difference. First operand 1376 states and 2197 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:52,313 INFO L93 Difference]: Finished difference Result 3279 states and 5268 transitions. [2022-11-22 00:06:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:06:52,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-22 00:06:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:52,322 INFO L225 Difference]: With dead ends: 3279 [2022-11-22 00:06:52,322 INFO L226 Difference]: Without dead ends: 2074 [2022-11-22 00:06:52,324 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 00:06:52,325 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 129 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:52,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 661 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-11-22 00:06:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2072. [2022-11-22 00:06:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 1.5997102848865283) internal successors, (3313), 2071 states have internal predecessors, (3313), 0 states have call successors, (0), 0 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 00:06:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3313 transitions. [2022-11-22 00:06:52,596 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3313 transitions. Word has length 101 [2022-11-22 00:06:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:52,596 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 3313 transitions. [2022-11-22 00:06:52,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3313 transitions. [2022-11-22 00:06:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-22 00:06:52,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:52,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:52,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:06:52,598 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:52,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1686559704, now seen corresponding path program 1 times [2022-11-22 00:06:52,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:52,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794519560] [2022-11-22 00:06:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:52,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:52,702 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 00:06:52,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:52,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794519560] [2022-11-22 00:06:52,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794519560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:52,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:52,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:06:52,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033378332] [2022-11-22 00:06:52,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:52,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:06:52,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:06:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:52,704 INFO L87 Difference]: Start difference. First operand 2072 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:53,311 INFO L93 Difference]: Finished difference Result 5379 states and 8652 transitions. [2022-11-22 00:06:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:06:53,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-11-22 00:06:53,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:53,326 INFO L225 Difference]: With dead ends: 5379 [2022-11-22 00:06:53,326 INFO L226 Difference]: Without dead ends: 3496 [2022-11-22 00:06:53,329 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 00:06:53,330 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 124 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:53,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 667 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2022-11-22 00:06:53,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3494. [2022-11-22 00:06:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 3493 states have (on average 1.6003435442313199) internal successors, (5590), 3493 states have internal predecessors, (5590), 0 states have call successors, (0), 0 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 00:06:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 5590 transitions. [2022-11-22 00:06:53,759 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 5590 transitions. Word has length 104 [2022-11-22 00:06:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:53,759 INFO L495 AbstractCegarLoop]: Abstraction has 3494 states and 5590 transitions. [2022-11-22 00:06:53,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 5590 transitions. [2022-11-22 00:06:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-22 00:06:53,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:53,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:53,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:06:53,762 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1560949449, now seen corresponding path program 1 times [2022-11-22 00:06:53,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:53,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479476650] [2022-11-22 00:06:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:53,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:53,873 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 00:06:53,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:53,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479476650] [2022-11-22 00:06:53,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479476650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:53,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:53,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:06:53,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319483329] [2022-11-22 00:06:53,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:53,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:06:53,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:06:53,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:53,876 INFO L87 Difference]: Start difference. First operand 3494 states and 5590 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:54,622 INFO L93 Difference]: Finished difference Result 8700 states and 13962 transitions. [2022-11-22 00:06:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:06:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-11-22 00:06:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:54,644 INFO L225 Difference]: With dead ends: 8700 [2022-11-22 00:06:54,644 INFO L226 Difference]: Without dead ends: 5395 [2022-11-22 00:06:54,649 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 00:06:54,651 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 123 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:54,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 663 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-11-22 00:06:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 5393. [2022-11-22 00:06:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5393 states, 5392 states have (on average 1.5992210682492582) internal successors, (8623), 5392 states have internal predecessors, (8623), 0 states have call successors, (0), 0 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 00:06:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5393 states to 5393 states and 8623 transitions. [2022-11-22 00:06:55,262 INFO L78 Accepts]: Start accepts. Automaton has 5393 states and 8623 transitions. Word has length 106 [2022-11-22 00:06:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:55,263 INFO L495 AbstractCegarLoop]: Abstraction has 5393 states and 8623 transitions. [2022-11-22 00:06:55,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5393 states and 8623 transitions. [2022-11-22 00:06:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 00:06:55,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:55,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:55,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:06:55,265 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:55,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1036556746, now seen corresponding path program 1 times [2022-11-22 00:06:55,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:55,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866570402] [2022-11-22 00:06:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:55,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:55,422 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 00:06:55,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:55,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866570402] [2022-11-22 00:06:55,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866570402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:55,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:55,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:06:55,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536470921] [2022-11-22 00:06:55,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:55,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:06:55,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:55,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:06:55,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:06:55,425 INFO L87 Difference]: Start difference. First operand 5393 states and 8623 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:56,916 INFO L93 Difference]: Finished difference Result 13476 states and 21549 transitions. [2022-11-22 00:06:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:06:56,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2022-11-22 00:06:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:56,949 INFO L225 Difference]: With dead ends: 13476 [2022-11-22 00:06:56,949 INFO L226 Difference]: Without dead ends: 8290 [2022-11-22 00:06:56,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:06:56,957 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1045 mSDsluCounter, 2699 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:56,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 3045 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:06:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-22 00:06:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8276. [2022-11-22 00:06:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.589728096676737) internal successors, (13155), 8275 states have internal predecessors, (13155), 0 states have call successors, (0), 0 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 00:06:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13155 transitions. [2022-11-22 00:06:57,926 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13155 transitions. Word has length 109 [2022-11-22 00:06:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:57,927 INFO L495 AbstractCegarLoop]: Abstraction has 8276 states and 13155 transitions. [2022-11-22 00:06:57,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 00:06:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13155 transitions. [2022-11-22 00:06:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-22 00:06:57,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:57,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:57,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:06:57,929 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:57,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2135550104, now seen corresponding path program 1 times [2022-11-22 00:06:57,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:57,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347378797] [2022-11-22 00:06:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:57,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:58,064 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 00:06:58,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:58,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347378797] [2022-11-22 00:06:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347378797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:58,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:58,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:06:58,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253401830] [2022-11-22 00:06:58,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:58,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:06:58,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:06:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:06:58,079 INFO L87 Difference]: Start difference. First operand 8276 states and 13155 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:59,317 INFO L93 Difference]: Finished difference Result 16347 states and 26005 transitions. [2022-11-22 00:06:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:06:59,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-11-22 00:06:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:59,351 INFO L225 Difference]: With dead ends: 16347 [2022-11-22 00:06:59,352 INFO L226 Difference]: Without dead ends: 8278 [2022-11-22 00:06:59,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:06:59,365 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 255 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:59,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 970 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2022-11-22 00:07:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2022-11-22 00:07:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.585619335347432) internal successors, (13121), 8275 states have internal predecessors, (13121), 0 states have call successors, (0), 0 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 00:07:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13121 transitions. [2022-11-22 00:07:00,358 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13121 transitions. Word has length 110 [2022-11-22 00:07:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:00,358 INFO L495 AbstractCegarLoop]: Abstraction has 8276 states and 13121 transitions. [2022-11-22 00:07:00,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13121 transitions. [2022-11-22 00:07:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-22 00:07:00,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:00,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:00,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 00:07:00,360 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:00,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1840047811, now seen corresponding path program 1 times [2022-11-22 00:07:00,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:00,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169039336] [2022-11-22 00:07:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:00,500 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 00:07:00,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:00,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169039336] [2022-11-22 00:07:00,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169039336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:00,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:00,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:07:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560745803] [2022-11-22 00:07:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:00,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:07:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:07:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:07:00,502 INFO L87 Difference]: Start difference. First operand 8276 states and 13121 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:01,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:01,446 INFO L93 Difference]: Finished difference Result 16347 states and 25937 transitions. [2022-11-22 00:07:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:07:01,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-11-22 00:07:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:01,467 INFO L225 Difference]: With dead ends: 16347 [2022-11-22 00:07:01,467 INFO L226 Difference]: Without dead ends: 8278 [2022-11-22 00:07:01,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:07:01,478 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 263 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:01,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 976 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:07:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2022-11-22 00:07:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2022-11-22 00:07:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.5815105740181268) internal successors, (13087), 8275 states have internal predecessors, (13087), 0 states have call successors, (0), 0 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 00:07:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13087 transitions. [2022-11-22 00:07:02,311 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13087 transitions. Word has length 111 [2022-11-22 00:07:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:02,312 INFO L495 AbstractCegarLoop]: Abstraction has 8276 states and 13087 transitions. [2022-11-22 00:07:02,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13087 transitions. [2022-11-22 00:07:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-22 00:07:02,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:02,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:02,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 00:07:02,314 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:02,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1264853297, now seen corresponding path program 1 times [2022-11-22 00:07:02,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:02,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840933806] [2022-11-22 00:07:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:02,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:02,431 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 00:07:02,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840933806] [2022-11-22 00:07:02,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840933806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:02,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:02,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:07:02,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329380518] [2022-11-22 00:07:02,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:02,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:07:02,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:02,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:07:02,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:07:02,433 INFO L87 Difference]: Start difference. First operand 8276 states and 13087 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 00:07:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:03,500 INFO L93 Difference]: Finished difference Result 16347 states and 25869 transitions. [2022-11-22 00:07:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:07:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-11-22 00:07:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:03,525 INFO L225 Difference]: With dead ends: 16347 [2022-11-22 00:07:03,525 INFO L226 Difference]: Without dead ends: 8278 [2022-11-22 00:07:03,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:07:03,538 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 261 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:03,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 979 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:07:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2022-11-22 00:07:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2022-11-22 00:07:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.5774018126888218) internal successors, (13053), 8275 states have internal predecessors, (13053), 0 states have call successors, (0), 0 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 00:07:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13053 transitions. [2022-11-22 00:07:04,281 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13053 transitions. Word has length 112 [2022-11-22 00:07:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:04,282 INFO L495 AbstractCegarLoop]: Abstraction has 8276 states and 13053 transitions. [2022-11-22 00:07:04,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 00:07:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13053 transitions. [2022-11-22 00:07:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-22 00:07:04,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:04,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:04,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 00:07:04,285 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:04,285 INFO L85 PathProgramCache]: Analyzing trace with hash -609134524, now seen corresponding path program 1 times [2022-11-22 00:07:04,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:04,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787791914] [2022-11-22 00:07:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:04,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:04,418 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 00:07:04,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787791914] [2022-11-22 00:07:04,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787791914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:04,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:04,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:07:04,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806388885] [2022-11-22 00:07:04,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:04,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:07:04,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:07:04,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:07:04,422 INFO L87 Difference]: Start difference. First operand 8276 states and 13053 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:05,576 INFO L93 Difference]: Finished difference Result 16347 states and 25801 transitions. [2022-11-22 00:07:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:07:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-11-22 00:07:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:05,598 INFO L225 Difference]: With dead ends: 16347 [2022-11-22 00:07:05,599 INFO L226 Difference]: Without dead ends: 8278 [2022-11-22 00:07:05,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:07:05,610 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 259 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:05,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 982 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:07:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2022-11-22 00:07:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2022-11-22 00:07:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.5732930513595167) internal successors, (13019), 8275 states have internal predecessors, (13019), 0 states have call successors, (0), 0 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 00:07:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13019 transitions. [2022-11-22 00:07:06,428 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13019 transitions. Word has length 113 [2022-11-22 00:07:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:06,428 INFO L495 AbstractCegarLoop]: Abstraction has 8276 states and 13019 transitions. [2022-11-22 00:07:06,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13019 transitions. [2022-11-22 00:07:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-22 00:07:06,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:06,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:06,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:07:06,430 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1514935861, now seen corresponding path program 1 times [2022-11-22 00:07:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:06,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538773684] [2022-11-22 00:07:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:06,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:06,763 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 00:07:06,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:06,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538773684] [2022-11-22 00:07:06,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538773684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:06,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:06,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:07:06,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838237905] [2022-11-22 00:07:06,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:06,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:07:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:06,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:07:06,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:06,766 INFO L87 Difference]: Start difference. First operand 8276 states and 13019 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 00:07:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:08,035 INFO L93 Difference]: Finished difference Result 16347 states and 25733 transitions. [2022-11-22 00:07:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:07:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2022-11-22 00:07:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:08,059 INFO L225 Difference]: With dead ends: 16347 [2022-11-22 00:07:08,059 INFO L226 Difference]: Without dead ends: 8278 [2022-11-22 00:07:08,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:07:08,070 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 338 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:08,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 1269 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:07:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2022-11-22 00:07:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2022-11-22 00:07:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.5713595166163141) internal successors, (13003), 8275 states have internal predecessors, (13003), 0 states have call successors, (0), 0 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 00:07:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13003 transitions. [2022-11-22 00:07:09,279 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13003 transitions. Word has length 115 [2022-11-22 00:07:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:09,279 INFO L495 AbstractCegarLoop]: Abstraction has 8276 states and 13003 transitions. [2022-11-22 00:07:09,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 00:07:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13003 transitions. [2022-11-22 00:07:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-22 00:07:09,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:09,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:09,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 00:07:09,282 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2110499679, now seen corresponding path program 1 times [2022-11-22 00:07:09,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:09,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529519363] [2022-11-22 00:07:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:09,614 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 00:07:09,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:09,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529519363] [2022-11-22 00:07:09,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529519363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:09,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:09,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:07:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662679602] [2022-11-22 00:07:09,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:09,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:07:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:07:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:09,617 INFO L87 Difference]: Start difference. First operand 8276 states and 13003 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 00:07:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:11,413 INFO L93 Difference]: Finished difference Result 20541 states and 32197 transitions. [2022-11-22 00:07:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:07:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2022-11-22 00:07:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:11,437 INFO L225 Difference]: With dead ends: 20541 [2022-11-22 00:07:11,437 INFO L226 Difference]: Without dead ends: 12472 [2022-11-22 00:07:11,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:07:11,451 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 438 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:11,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1298 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:07:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12472 states. [2022-11-22 00:07:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12472 to 12470. [2022-11-22 00:07:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12470 states, 12469 states have (on average 1.5618734461464432) internal successors, (19475), 12469 states have internal predecessors, (19475), 0 states have call successors, (0), 0 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 00:07:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12470 states to 12470 states and 19475 transitions. [2022-11-22 00:07:13,057 INFO L78 Accepts]: Start accepts. Automaton has 12470 states and 19475 transitions. Word has length 118 [2022-11-22 00:07:13,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:13,057 INFO L495 AbstractCegarLoop]: Abstraction has 12470 states and 19475 transitions. [2022-11-22 00:07:13,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 00:07:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 12470 states and 19475 transitions. [2022-11-22 00:07:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-22 00:07:13,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:13,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:13,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 00:07:13,060 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:13,060 INFO L85 PathProgramCache]: Analyzing trace with hash -969702568, now seen corresponding path program 1 times [2022-11-22 00:07:13,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:13,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545262904] [2022-11-22 00:07:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:13,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:13,532 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 00:07:13,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:13,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545262904] [2022-11-22 00:07:13,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545262904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:13,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:13,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:07:13,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428418681] [2022-11-22 00:07:13,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:13,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:07:13,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:13,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:07:13,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:13,538 INFO L87 Difference]: Start difference. First operand 12470 states and 19475 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 00:07:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:15,731 INFO L93 Difference]: Finished difference Result 15348 states and 23856 transitions. [2022-11-22 00:07:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:07:15,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2022-11-22 00:07:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:15,753 INFO L225 Difference]: With dead ends: 15348 [2022-11-22 00:07:15,753 INFO L226 Difference]: Without dead ends: 15346 [2022-11-22 00:07:15,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:07:15,758 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 371 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:15,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 2103 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:07:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15346 states. [2022-11-22 00:07:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15346 to 12484. [2022-11-22 00:07:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12484 states, 12483 states have (on average 1.5596411119122007) internal successors, (19469), 12483 states have internal predecessors, (19469), 0 states have call successors, (0), 0 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 00:07:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12484 states to 12484 states and 19469 transitions. [2022-11-22 00:07:17,221 INFO L78 Accepts]: Start accepts. Automaton has 12484 states and 19469 transitions. Word has length 119 [2022-11-22 00:07:17,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:17,221 INFO L495 AbstractCegarLoop]: Abstraction has 12484 states and 19469 transitions. [2022-11-22 00:07:17,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 00:07:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 12484 states and 19469 transitions. [2022-11-22 00:07:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-22 00:07:17,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:17,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:17,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 00:07:17,224 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2050752886, now seen corresponding path program 1 times [2022-11-22 00:07:17,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:17,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628943692] [2022-11-22 00:07:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:17,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:07:18,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:18,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628943692] [2022-11-22 00:07:18,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628943692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:18,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034542001] [2022-11-22 00:07:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:18,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:18,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:18,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:18,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:07:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:19,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:07:19,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:07:19,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:07:19,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034542001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:19,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:07:19,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-11-22 00:07:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697645234] [2022-11-22 00:07:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:19,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:07:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:07:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:07:19,447 INFO L87 Difference]: Start difference. First operand 12484 states and 19469 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 00:07:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:23,256 INFO L93 Difference]: Finished difference Result 36750 states and 57353 transitions. [2022-11-22 00:07:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:07:23,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-22 00:07:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:23,292 INFO L225 Difference]: With dead ends: 36750 [2022-11-22 00:07:23,292 INFO L226 Difference]: Without dead ends: 24471 [2022-11-22 00:07:23,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-22 00:07:23,305 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 793 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:23,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 721 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:07:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24471 states. [2022-11-22 00:07:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24471 to 24469. [2022-11-22 00:07:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24469 states, 24468 states have (on average 1.5560732385156122) internal successors, (38074), 24468 states have internal predecessors, (38074), 0 states have call successors, (0), 0 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 00:07:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24469 states to 24469 states and 38074 transitions. [2022-11-22 00:07:26,113 INFO L78 Accepts]: Start accepts. Automaton has 24469 states and 38074 transitions. Word has length 127 [2022-11-22 00:07:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:26,113 INFO L495 AbstractCegarLoop]: Abstraction has 24469 states and 38074 transitions. [2022-11-22 00:07:26,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 00:07:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 24469 states and 38074 transitions. [2022-11-22 00:07:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-22 00:07:26,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:26,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:26,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:26,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c7e825c-2044-4197-bb20-8d420a7aa396/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 00:07:26,319 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:26,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2066299650, now seen corresponding path program 1 times [2022-11-22 00:07:26,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:26,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141288585] [2022-11-22 00:07:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:26,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:07:26,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:26,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141288585] [2022-11-22 00:07:26,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141288585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:26,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:26,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:07:26,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880310939] [2022-11-22 00:07:26,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:26,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:26,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:07:26,459 INFO L87 Difference]: Start difference. First operand 24469 states and 38074 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:32,070 INFO L93 Difference]: Finished difference Result 71785 states and 111776 transitions. [2022-11-22 00:07:32,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:32,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-22 00:07:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:32,148 INFO L225 Difference]: With dead ends: 71785 [2022-11-22 00:07:32,148 INFO L226 Difference]: Without dead ends: 47404 [2022-11-22 00:07:32,169 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 00:07:32,169 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 246 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:32,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 943 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:07:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47404 states. [2022-11-22 00:07:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47404 to 47402. [2022-11-22 00:07:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47402 states, 47401 states have (on average 1.5497985274572266) internal successors, (73462), 47401 states have internal predecessors, (73462), 0 states have call successors, (0), 0 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 00:07:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47402 states to 47402 states and 73462 transitions. [2022-11-22 00:07:38,987 INFO L78 Accepts]: Start accepts. Automaton has 47402 states and 73462 transitions. Word has length 129 [2022-11-22 00:07:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:38,988 INFO L495 AbstractCegarLoop]: Abstraction has 47402 states and 73462 transitions. [2022-11-22 00:07:38,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 47402 states and 73462 transitions. [2022-11-22 00:07:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-22 00:07:38,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:38,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:38,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 00:07:38,991 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2122052879, now seen corresponding path program 1 times [2022-11-22 00:07:38,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:38,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146458815] [2022-11-22 00:07:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:38,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:07:39,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:39,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146458815] [2022-11-22 00:07:39,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146458815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:39,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:39,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:07:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288329027] [2022-11-22 00:07:39,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:39,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:39,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:39,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:39,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:07:39,095 INFO L87 Difference]: Start difference. First operand 47402 states and 73462 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)