./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH --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 0ffe39e5069596e29b504492c7e6b50a86ab43c69c1a6acd2a45f3ed316ecfd7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:54:27,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:54:27,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:54:27,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:54:27,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:54:27,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:54:27,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:54:27,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:54:27,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:54:27,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:54:27,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:54:27,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:54:27,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:54:27,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:54:27,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:54:27,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:54:27,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:54:27,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:54:27,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:54:27,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:54:27,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:54:27,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:54:27,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:54:27,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:54:27,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:54:27,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:54:27,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:54:27,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:54:27,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:54:27,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:54:27,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:54:27,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:54:27,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:54:27,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:54:27,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:54:27,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:54:27,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:54:27,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:54:27,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:54:27,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:54:27,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:54:27,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:54:27,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:54:27,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:54:27,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:54:27,817 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:54:27,817 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:54:27,818 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:54:27,818 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:54:27,819 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:54:27,819 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:54:27,819 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:54:27,820 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:54:27,820 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:54:27,820 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:54:27,820 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:54:27,821 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:54:27,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:54:27,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:54:27,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:54:27,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:54:27,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:54:27,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:54:27,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:54:27,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:54:27,823 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:54:27,824 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:54:27,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:54:27,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:54:27,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:54:27,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:54:27,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:54:27,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:54:27,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:54:27,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:54:27,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:54:27,826 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:54:27,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:54:27,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:54:27,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:54:27,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:54:27,828 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ffe39e5069596e29b504492c7e6b50a86ab43c69c1a6acd2a45f3ed316ecfd7 [2021-11-03 03:54:28,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:54:28,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:54:28,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:54:28,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:54:28,095 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:54:28,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-03 03:54:28,177 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/data/bad334429/fcd6df3bbb654d5084d6dca5032fd70e/FLAGf665e273a [2021-11-03 03:54:28,788 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:54:28,789 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-03 03:54:28,803 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/data/bad334429/fcd6df3bbb654d5084d6dca5032fd70e/FLAGf665e273a [2021-11-03 03:54:29,069 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/data/bad334429/fcd6df3bbb654d5084d6dca5032fd70e [2021-11-03 03:54:29,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:54:29,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:54:29,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:54:29,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:54:29,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:54:29,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:29,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9f80f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29, skipping insertion in model container [2021-11-03 03:54:29,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:29,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:54:29,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:54:29,558 WARN L228 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_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15966,15979] [2021-11-03 03:54:29,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:54:29,663 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:54:29,821 WARN L228 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_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15966,15979] [2021-11-03 03:54:29,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:54:29,917 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:54:29,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29 WrapperNode [2021-11-03 03:54:29,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:54:29,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:54:29,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:54:29,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:54:29,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:29,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:30,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:54:30,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:54:30,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:54:30,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:54:30,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:30,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:30,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:30,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:30,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:30,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:30,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:30,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:54:30,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:54:30,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:54:30,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:54:30,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (1/1) ... [2021-11-03 03:54:30,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:54:30,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:54:30,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:54:30,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e523d8-a14a-4e33-b9fa-d1ba940a36ee/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:54:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:54:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:54:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:54:30,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:54:32,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:54:32,756 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 03:54:32,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:54:32 BoogieIcfgContainer [2021-11-03 03:54:32,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:54:32,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:54:32,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:54:32,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:54:32,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:54:29" (1/3) ... [2021-11-03 03:54:32,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7461cc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:54:32, skipping insertion in model container [2021-11-03 03:54:32,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:54:29" (2/3) ... [2021-11-03 03:54:32,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7461cc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:54:32, skipping insertion in model container [2021-11-03 03:54:32,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:54:32" (3/3) ... [2021-11-03 03:54:32,771 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-03 03:54:32,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:54:32,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:54:32,841 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:54:32,851 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 03:54:32,851 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:54:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 249 states, 247 states have (on average 1.777327935222672) internal successors, (439), 248 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-03 03:54:32,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:32,899 INFO L513 BasicCegarLoop]: 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] [2021-11-03 03:54:32,900 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:32,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1108360375, now seen corresponding path program 1 times [2021-11-03 03:54:32,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:32,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891469062] [2021-11-03 03:54:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:32,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:33,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:33,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891469062] [2021-11-03 03:54:33,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891469062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:33,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:33,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:54:33,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926231934] [2021-11-03 03:54:33,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:54:33,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:33,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:54:34,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:34,008 INFO L87 Difference]: Start difference. First operand has 249 states, 247 states have (on average 1.777327935222672) internal successors, (439), 248 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:34,287 INFO L93 Difference]: Finished difference Result 607 states and 1061 transitions. [2021-11-03 03:54:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:54:34,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-03 03:54:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:34,316 INFO L225 Difference]: With dead ends: 607 [2021-11-03 03:54:34,316 INFO L226 Difference]: Without dead ends: 423 [2021-11-03 03:54:34,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:54:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-03 03:54:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 421. [2021-11-03 03:54:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.3857142857142857) internal successors, (582), 420 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 582 transitions. [2021-11-03 03:54:34,454 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 582 transitions. Word has length 116 [2021-11-03 03:54:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:34,456 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 582 transitions. [2021-11-03 03:54:34,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 582 transitions. [2021-11-03 03:54:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-03 03:54:34,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:34,467 INFO L513 BasicCegarLoop]: 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] [2021-11-03 03:54:34,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:54:34,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:34,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1311660061, now seen corresponding path program 1 times [2021-11-03 03:54:34,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:34,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700795326] [2021-11-03 03:54:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:34,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:34,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:34,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700795326] [2021-11-03 03:54:34,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700795326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:34,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:34,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:34,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798350816] [2021-11-03 03:54:34,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:54:34,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:54:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:54:34,638 INFO L87 Difference]: Start difference. First operand 421 states and 582 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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) [2021-11-03 03:54:34,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:34,763 INFO L93 Difference]: Finished difference Result 948 states and 1339 transitions. [2021-11-03 03:54:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:54:34,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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 [2021-11-03 03:54:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:34,769 INFO L225 Difference]: With dead ends: 948 [2021-11-03 03:54:34,769 INFO L226 Difference]: Without dead ends: 589 [2021-11-03 03:54:34,772 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:54:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-03 03:54:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 530. [2021-11-03 03:54:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 1.4291115311909264) internal successors, (756), 529 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 756 transitions. [2021-11-03 03:54:34,816 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 756 transitions. Word has length 118 [2021-11-03 03:54:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:34,816 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 756 transitions. [2021-11-03 03:54:34,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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) [2021-11-03 03:54:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 756 transitions. [2021-11-03 03:54:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-03 03:54:34,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:34,819 INFO L513 BasicCegarLoop]: 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] [2021-11-03 03:54:34,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 03:54:34,820 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash -386359019, now seen corresponding path program 1 times [2021-11-03 03:54:34,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:34,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675232971] [2021-11-03 03:54:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:34,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:34,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:34,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675232971] [2021-11-03 03:54:34,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675232971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:34,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:34,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:34,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366179379] [2021-11-03 03:54:34,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:54:34,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:54:34,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:54:34,891 INFO L87 Difference]: Start difference. First operand 530 states and 756 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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) [2021-11-03 03:54:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:34,984 INFO L93 Difference]: Finished difference Result 1215 states and 1775 transitions. [2021-11-03 03:54:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:54:34,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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 [2021-11-03 03:54:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:34,991 INFO L225 Difference]: With dead ends: 1215 [2021-11-03 03:54:34,991 INFO L226 Difference]: Without dead ends: 772 [2021-11-03 03:54:34,993 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:54:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-03 03:54:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 734. [2021-11-03 03:54:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.4788540245566166) internal successors, (1084), 733 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1084 transitions. [2021-11-03 03:54:35,046 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1084 transitions. Word has length 118 [2021-11-03 03:54:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:35,047 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1084 transitions. [2021-11-03 03:54:35,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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) [2021-11-03 03:54:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1084 transitions. [2021-11-03 03:54:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-03 03:54:35,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:35,050 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:35,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 03:54:35,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:35,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:35,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1169225483, now seen corresponding path program 1 times [2021-11-03 03:54:35,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:35,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418686488] [2021-11-03 03:54:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:35,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:35,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:35,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418686488] [2021-11-03 03:54:35,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418686488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:35,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:35,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:54:35,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672379235] [2021-11-03 03:54:35,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:54:35,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:54:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:35,200 INFO L87 Difference]: Start difference. First operand 734 states and 1084 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:35,424 INFO L93 Difference]: Finished difference Result 1410 states and 2096 transitions. [2021-11-03 03:54:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:54:35,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-03 03:54:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:35,431 INFO L225 Difference]: With dead ends: 1410 [2021-11-03 03:54:35,432 INFO L226 Difference]: Without dead ends: 734 [2021-11-03 03:54:35,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:54:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-03 03:54:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-03 03:54:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.4583901773533425) internal successors, (1069), 733 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1069 transitions. [2021-11-03 03:54:35,498 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1069 transitions. Word has length 121 [2021-11-03 03:54:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:35,499 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1069 transitions. [2021-11-03 03:54:35,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1069 transitions. [2021-11-03 03:54:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-03 03:54:35,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:35,506 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:35,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 03:54:35,506 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash 191248934, now seen corresponding path program 1 times [2021-11-03 03:54:35,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:35,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215736392] [2021-11-03 03:54:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:35,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:35,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:35,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215736392] [2021-11-03 03:54:35,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215736392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:35,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:35,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:54:35,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685406388] [2021-11-03 03:54:35,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:54:35,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:54:35,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:35,863 INFO L87 Difference]: Start difference. First operand 734 states and 1069 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:36,080 INFO L93 Difference]: Finished difference Result 1925 states and 2819 transitions. [2021-11-03 03:54:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:54:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-03 03:54:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:36,088 INFO L225 Difference]: With dead ends: 1925 [2021-11-03 03:54:36,089 INFO L226 Difference]: Without dead ends: 1284 [2021-11-03 03:54:36,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-11-03 03:54:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1282. [2021-11-03 03:54:36,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.4457455113192819) internal successors, (1852), 1281 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1852 transitions. [2021-11-03 03:54:36,220 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1852 transitions. Word has length 121 [2021-11-03 03:54:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:36,221 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1852 transitions. [2021-11-03 03:54:36,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1852 transitions. [2021-11-03 03:54:36,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-03 03:54:36,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:36,224 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:36,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 03:54:36,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:36,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1721574809, now seen corresponding path program 1 times [2021-11-03 03:54:36,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:36,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359747903] [2021-11-03 03:54:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:36,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:36,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:36,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359747903] [2021-11-03 03:54:36,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359747903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:36,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:36,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:36,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195016403] [2021-11-03 03:54:36,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:54:36,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:36,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:54:36,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:54:36,282 INFO L87 Difference]: Start difference. First operand 1282 states and 1852 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:36,543 INFO L93 Difference]: Finished difference Result 3316 states and 4886 transitions. [2021-11-03 03:54:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:54:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-03 03:54:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:36,557 INFO L225 Difference]: With dead ends: 3316 [2021-11-03 03:54:36,557 INFO L226 Difference]: Without dead ends: 2081 [2021-11-03 03:54:36,560 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:54:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-11-03 03:54:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1912. [2021-11-03 03:54:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 1.4866562009419153) internal successors, (2841), 1911 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2841 transitions. [2021-11-03 03:54:36,738 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2841 transitions. Word has length 123 [2021-11-03 03:54:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:36,740 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 2841 transitions. [2021-11-03 03:54:36,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2841 transitions. [2021-11-03 03:54:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 03:54:36,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:36,743 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:36,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 03:54:36,744 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:36,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2028328162, now seen corresponding path program 1 times [2021-11-03 03:54:36,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:36,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591746644] [2021-11-03 03:54:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:36,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:36,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:36,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591746644] [2021-11-03 03:54:36,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591746644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:36,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:36,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:54:36,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372482434] [2021-11-03 03:54:36,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:54:36,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:54:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:36,899 INFO L87 Difference]: Start difference. First operand 1912 states and 2841 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:37,252 INFO L93 Difference]: Finished difference Result 3423 states and 5117 transitions. [2021-11-03 03:54:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:54:37,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-03 03:54:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:37,265 INFO L225 Difference]: With dead ends: 3423 [2021-11-03 03:54:37,265 INFO L226 Difference]: Without dead ends: 1912 [2021-11-03 03:54:37,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:54:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-11-03 03:54:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1912. [2021-11-03 03:54:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 1.4740973312401884) internal successors, (2817), 1911 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2817 transitions. [2021-11-03 03:54:37,493 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2817 transitions. Word has length 126 [2021-11-03 03:54:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:37,494 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 2817 transitions. [2021-11-03 03:54:37,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2817 transitions. [2021-11-03 03:54:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 03:54:37,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:37,497 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:37,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 03:54:37,497 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1515776089, now seen corresponding path program 1 times [2021-11-03 03:54:37,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:37,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314817] [2021-11-03 03:54:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:37,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:37,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:37,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314817] [2021-11-03 03:54:37,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:37,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:37,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:54:37,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706613202] [2021-11-03 03:54:37,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:54:37,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:54:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:37,712 INFO L87 Difference]: Start difference. First operand 1912 states and 2817 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:38,160 INFO L93 Difference]: Finished difference Result 5460 states and 8105 transitions. [2021-11-03 03:54:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:54:38,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-03 03:54:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:38,181 INFO L225 Difference]: With dead ends: 5460 [2021-11-03 03:54:38,182 INFO L226 Difference]: Without dead ends: 3643 [2021-11-03 03:54:38,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2021-11-03 03:54:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 3641. [2021-11-03 03:54:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 1.4733516483516484) internal successors, (5363), 3640 states have internal predecessors, (5363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5363 transitions. [2021-11-03 03:54:38,577 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5363 transitions. Word has length 126 [2021-11-03 03:54:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:38,577 INFO L470 AbstractCegarLoop]: Abstraction has 3641 states and 5363 transitions. [2021-11-03 03:54:38,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5363 transitions. [2021-11-03 03:54:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 03:54:38,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:38,581 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:38,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 03:54:38,582 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash 376216476, now seen corresponding path program 1 times [2021-11-03 03:54:38,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:38,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19241040] [2021-11-03 03:54:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:38,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:38,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:38,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19241040] [2021-11-03 03:54:38,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19241040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:38,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:38,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:54:38,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107536061] [2021-11-03 03:54:38,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:54:38,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:54:38,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:38,847 INFO L87 Difference]: Start difference. First operand 3641 states and 5363 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:39,476 INFO L93 Difference]: Finished difference Result 7063 states and 10407 transitions. [2021-11-03 03:54:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:54:39,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-03 03:54:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:39,511 INFO L225 Difference]: With dead ends: 7063 [2021-11-03 03:54:39,511 INFO L226 Difference]: Without dead ends: 5334 [2021-11-03 03:54:39,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:39,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-11-03 03:54:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5332. [2021-11-03 03:54:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5331 states have (on average 1.4582629900581505) internal successors, (7774), 5331 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 7774 transitions. [2021-11-03 03:54:40,200 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 7774 transitions. Word has length 131 [2021-11-03 03:54:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:40,201 INFO L470 AbstractCegarLoop]: Abstraction has 5332 states and 7774 transitions. [2021-11-03 03:54:40,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 7774 transitions. [2021-11-03 03:54:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 03:54:40,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:40,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:40,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 03:54:40,207 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:40,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2032930890, now seen corresponding path program 1 times [2021-11-03 03:54:40,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:40,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017751095] [2021-11-03 03:54:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:40,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:44,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:44,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017751095] [2021-11-03 03:54:44,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017751095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:44,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:44,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-03 03:54:44,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394071753] [2021-11-03 03:54:44,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-03 03:54:44,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:44,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-03 03:54:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-11-03 03:54:44,269 INFO L87 Difference]: Start difference. First operand 5332 states and 7774 transitions. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:52,556 INFO L93 Difference]: Finished difference Result 7733 states and 11129 transitions. [2021-11-03 03:54:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-03 03:54:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-03 03:54:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:52,592 INFO L225 Difference]: With dead ends: 7733 [2021-11-03 03:54:52,592 INFO L226 Difference]: Without dead ends: 6063 [2021-11-03 03:54:52,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=431, Invalid=1549, Unknown=0, NotChecked=0, Total=1980 [2021-11-03 03:54:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-11-03 03:54:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 5425. [2021-11-03 03:54:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 1.4540929203539823) internal successors, (7887), 5424 states have internal predecessors, (7887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 7887 transitions. [2021-11-03 03:54:53,185 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 7887 transitions. Word has length 131 [2021-11-03 03:54:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:53,185 INFO L470 AbstractCegarLoop]: Abstraction has 5425 states and 7887 transitions. [2021-11-03 03:54:53,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 7887 transitions. [2021-11-03 03:54:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 03:54:53,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:53,190 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:53,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 03:54:53,191 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1365594929, now seen corresponding path program 1 times [2021-11-03 03:54:53,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:53,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920029760] [2021-11-03 03:54:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:53,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:53,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:53,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920029760] [2021-11-03 03:54:53,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920029760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:53,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:53,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:54:53,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977053653] [2021-11-03 03:54:53,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:54:53,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:53,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:54:53,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:54:53,288 INFO L87 Difference]: Start difference. First operand 5425 states and 7887 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:53,990 INFO L93 Difference]: Finished difference Result 10417 states and 15282 transitions. [2021-11-03 03:54:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:54:53,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-03 03:54:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:54,035 INFO L225 Difference]: With dead ends: 10417 [2021-11-03 03:54:54,035 INFO L226 Difference]: Without dead ends: 7838 [2021-11-03 03:54:54,044 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:54:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2021-11-03 03:54:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 7836. [2021-11-03 03:54:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 1.4430121250797703) internal successors, (11306), 7835 states have internal predecessors, (11306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 11306 transitions. [2021-11-03 03:54:54,844 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 11306 transitions. Word has length 131 [2021-11-03 03:54:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:54,844 INFO L470 AbstractCegarLoop]: Abstraction has 7836 states and 11306 transitions. [2021-11-03 03:54:54,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 11306 transitions. [2021-11-03 03:54:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 03:54:54,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:54,852 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:54,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 03:54:54,853 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash 155096622, now seen corresponding path program 1 times [2021-11-03 03:54:54,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:54,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282912538] [2021-11-03 03:54:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:54,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:55,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:55,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282912538] [2021-11-03 03:54:55,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282912538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:55,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:55,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:54:55,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39111598] [2021-11-03 03:54:55,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:54:55,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:54:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:55,126 INFO L87 Difference]: Start difference. First operand 7836 states and 11306 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:55,895 INFO L93 Difference]: Finished difference Result 10420 states and 15152 transitions. [2021-11-03 03:54:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:54:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-03 03:54:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:55,916 INFO L225 Difference]: With dead ends: 10420 [2021-11-03 03:54:55,917 INFO L226 Difference]: Without dead ends: 7273 [2021-11-03 03:54:55,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:54:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7273 states. [2021-11-03 03:54:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7273 to 7271. [2021-11-03 03:54:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7271 states, 7270 states have (on average 1.4444291609353508) internal successors, (10501), 7270 states have internal predecessors, (10501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 10501 transitions. [2021-11-03 03:54:56,522 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 10501 transitions. Word has length 131 [2021-11-03 03:54:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:56,523 INFO L470 AbstractCegarLoop]: Abstraction has 7271 states and 10501 transitions. [2021-11-03 03:54:56,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 10501 transitions. [2021-11-03 03:54:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 03:54:56,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:56,528 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:56,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 03:54:56,529 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:56,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1698102289, now seen corresponding path program 1 times [2021-11-03 03:54:56,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:56,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068251898] [2021-11-03 03:54:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:56,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:56,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:56,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068251898] [2021-11-03 03:54:56,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068251898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:56,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:56,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:54:56,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972783183] [2021-11-03 03:54:56,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:54:56,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:56,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:54:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:56,606 INFO L87 Difference]: Start difference. First operand 7271 states and 10501 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:57,287 INFO L93 Difference]: Finished difference Result 14439 states and 20883 transitions. [2021-11-03 03:54:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:54:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-03 03:54:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:57,307 INFO L225 Difference]: With dead ends: 14439 [2021-11-03 03:54:57,307 INFO L226 Difference]: Without dead ends: 7271 [2021-11-03 03:54:57,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:54:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2021-11-03 03:54:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 7271. [2021-11-03 03:54:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7271 states, 7270 states have (on average 1.427372764786795) internal successors, (10377), 7270 states have internal predecessors, (10377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 10377 transitions. [2021-11-03 03:54:57,902 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 10377 transitions. Word has length 131 [2021-11-03 03:54:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:57,902 INFO L470 AbstractCegarLoop]: Abstraction has 7271 states and 10377 transitions. [2021-11-03 03:54:57,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 10377 transitions. [2021-11-03 03:54:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 03:54:57,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:57,908 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:57,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 03:54:57,909 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash 985329552, now seen corresponding path program 1 times [2021-11-03 03:54:57,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:57,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518375342] [2021-11-03 03:54:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:57,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:54:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:54:58,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:54:58,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518375342] [2021-11-03 03:54:58,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518375342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:54:58,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:54:58,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:54:58,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699887113] [2021-11-03 03:54:58,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:54:58,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:54:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:54:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:58,138 INFO L87 Difference]: Start difference. First operand 7271 states and 10377 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:54:58,771 INFO L93 Difference]: Finished difference Result 12240 states and 17725 transitions. [2021-11-03 03:54:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:54:58,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-03 03:54:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:54:58,790 INFO L225 Difference]: With dead ends: 12240 [2021-11-03 03:54:58,790 INFO L226 Difference]: Without dead ends: 7665 [2021-11-03 03:54:58,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:54:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7665 states. [2021-11-03 03:54:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7665 to 6468. [2021-11-03 03:54:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 1.4284830678830989) internal successors, (9238), 6467 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 9238 transitions. [2021-11-03 03:54:59,443 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 9238 transitions. Word has length 131 [2021-11-03 03:54:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:54:59,443 INFO L470 AbstractCegarLoop]: Abstraction has 6468 states and 9238 transitions. [2021-11-03 03:54:59,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:54:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 9238 transitions. [2021-11-03 03:54:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 03:54:59,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:54:59,448 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:54:59,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 03:54:59,449 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:54:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:54:59,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1535946816, now seen corresponding path program 1 times [2021-11-03 03:54:59,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:54:59,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134518365] [2021-11-03 03:54:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:54:59,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:54:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:55:02,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:55:02,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134518365] [2021-11-03 03:55:02,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134518365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:02,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:02,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-03 03:55:02,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589347588] [2021-11-03 03:55:02,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-03 03:55:02,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:55:02,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-03 03:55:02,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-11-03 03:55:02,908 INFO L87 Difference]: Start difference. First operand 6468 states and 9238 transitions. Second operand has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:09,995 INFO L93 Difference]: Finished difference Result 11010 states and 15532 transitions. [2021-11-03 03:55:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-03 03:55:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-03 03:55:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:10,008 INFO L225 Difference]: With dead ends: 11010 [2021-11-03 03:55:10,009 INFO L226 Difference]: Without dead ends: 7766 [2021-11-03 03:55:10,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=451, Invalid=1619, Unknown=0, NotChecked=0, Total=2070 [2021-11-03 03:55:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7766 states. [2021-11-03 03:55:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7766 to 6599. [2021-11-03 03:55:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6599 states, 6598 states have (on average 1.4239163382843285) internal successors, (9395), 6598 states have internal predecessors, (9395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6599 states to 6599 states and 9395 transitions. [2021-11-03 03:55:10,574 INFO L78 Accepts]: Start accepts. Automaton has 6599 states and 9395 transitions. Word has length 131 [2021-11-03 03:55:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:10,575 INFO L470 AbstractCegarLoop]: Abstraction has 6599 states and 9395 transitions. [2021-11-03 03:55:10,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6599 states and 9395 transitions. [2021-11-03 03:55:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-03 03:55:10,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:10,580 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:10,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 03:55:10,581 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:55:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:10,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1928959065, now seen corresponding path program 1 times [2021-11-03 03:55:10,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:55:10,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807386] [2021-11-03 03:55:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:10,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:55:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:55:10,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:55:10,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807386] [2021-11-03 03:55:10,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:10,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:10,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:55:10,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589822391] [2021-11-03 03:55:10,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:55:10,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:55:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:55:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:55:10,628 INFO L87 Difference]: Start difference. First operand 6599 states and 9395 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:11,221 INFO L93 Difference]: Finished difference Result 10488 states and 14950 transitions. [2021-11-03 03:55:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:55:11,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-03 03:55:11,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:11,231 INFO L225 Difference]: With dead ends: 10488 [2021-11-03 03:55:11,232 INFO L226 Difference]: Without dead ends: 6623 [2021-11-03 03:55:11,238 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:55:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6623 states. [2021-11-03 03:55:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6623 to 6551. [2021-11-03 03:55:11,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6551 states, 6550 states have (on average 1.4195419847328243) internal successors, (9298), 6550 states have internal predecessors, (9298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 9298 transitions. [2021-11-03 03:55:12,003 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 9298 transitions. Word has length 132 [2021-11-03 03:55:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:12,004 INFO L470 AbstractCegarLoop]: Abstraction has 6551 states and 9298 transitions. [2021-11-03 03:55:12,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 9298 transitions. [2021-11-03 03:55:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-03 03:55:12,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:12,010 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:12,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 03:55:12,010 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:55:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1644653967, now seen corresponding path program 1 times [2021-11-03 03:55:12,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:55:12,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978257770] [2021-11-03 03:55:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:12,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:55:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:55:12,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:55:12,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978257770] [2021-11-03 03:55:12,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978257770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:12,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:12,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:55:12,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583901151] [2021-11-03 03:55:12,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:55:12,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:55:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:55:12,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:55:12,059 INFO L87 Difference]: Start difference. First operand 6551 states and 9298 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:12,853 INFO L93 Difference]: Finished difference Result 11541 states and 16342 transitions. [2021-11-03 03:55:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:55:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-03 03:55:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:12,862 INFO L225 Difference]: With dead ends: 11541 [2021-11-03 03:55:12,862 INFO L226 Difference]: Without dead ends: 7160 [2021-11-03 03:55:12,867 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:55:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7160 states. [2021-11-03 03:55:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7160 to 6503. [2021-11-03 03:55:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6503 states, 6502 states have (on average 1.4151030452168563) internal successors, (9201), 6502 states have internal predecessors, (9201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6503 states to 6503 states and 9201 transitions. [2021-11-03 03:55:13,534 INFO L78 Accepts]: Start accepts. Automaton has 6503 states and 9201 transitions. Word has length 132 [2021-11-03 03:55:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:13,534 INFO L470 AbstractCegarLoop]: Abstraction has 6503 states and 9201 transitions. [2021-11-03 03:55:13,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 6503 states and 9201 transitions. [2021-11-03 03:55:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-03 03:55:13,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:13,538 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:13,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 03:55:13,539 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:55:13,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:13,539 INFO L85 PathProgramCache]: Analyzing trace with hash 980274033, now seen corresponding path program 1 times [2021-11-03 03:55:13,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:55:13,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125898347] [2021-11-03 03:55:13,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:13,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:55:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:55:13,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:55:13,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125898347] [2021-11-03 03:55:13,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125898347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:13,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:13,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:55:13,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637398702] [2021-11-03 03:55:13,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:55:13,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:55:13,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:55:13,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:55:13,586 INFO L87 Difference]: Start difference. First operand 6503 states and 9201 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:14,295 INFO L93 Difference]: Finished difference Result 11361 states and 15994 transitions. [2021-11-03 03:55:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:55:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-03 03:55:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:14,303 INFO L225 Difference]: With dead ends: 11361 [2021-11-03 03:55:14,303 INFO L226 Difference]: Without dead ends: 7388 [2021-11-03 03:55:14,308 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:55:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2021-11-03 03:55:14,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6445. [2021-11-03 03:55:14,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6445 states, 6444 states have (on average 1.4115456238361266) internal successors, (9096), 6444 states have internal predecessors, (9096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6445 states to 6445 states and 9096 transitions. [2021-11-03 03:55:14,879 INFO L78 Accepts]: Start accepts. Automaton has 6445 states and 9096 transitions. Word has length 132 [2021-11-03 03:55:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:14,879 INFO L470 AbstractCegarLoop]: Abstraction has 6445 states and 9096 transitions. [2021-11-03 03:55:14,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:14,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6445 states and 9096 transitions. [2021-11-03 03:55:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-03 03:55:14,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:14,884 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:14,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 03:55:14,885 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:55:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash 522978550, now seen corresponding path program 1 times [2021-11-03 03:55:14,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:55:14,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823738332] [2021-11-03 03:55:14,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:14,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:55:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:55:14,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:55:14,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823738332] [2021-11-03 03:55:14,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823738332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:14,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:14,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:55:14,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022879292] [2021-11-03 03:55:14,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:55:14,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:55:14,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:55:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:55:14,952 INFO L87 Difference]: Start difference. First operand 6445 states and 9096 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:15,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:15,728 INFO L93 Difference]: Finished difference Result 14178 states and 19893 transitions. [2021-11-03 03:55:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:55:15,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-03 03:55:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:15,739 INFO L225 Difference]: With dead ends: 14178 [2021-11-03 03:55:15,739 INFO L226 Difference]: Without dead ends: 8029 [2021-11-03 03:55:15,747 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:55:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2021-11-03 03:55:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 6369. [2021-11-03 03:55:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 1.4056218592964824) internal successors, (8951), 6368 states have internal predecessors, (8951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 8951 transitions. [2021-11-03 03:55:16,417 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 8951 transitions. Word has length 132 [2021-11-03 03:55:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:16,418 INFO L470 AbstractCegarLoop]: Abstraction has 6369 states and 8951 transitions. [2021-11-03 03:55:16,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 8951 transitions. [2021-11-03 03:55:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-03 03:55:16,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:16,423 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:16,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 03:55:16,424 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:55:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:16,424 INFO L85 PathProgramCache]: Analyzing trace with hash 713413560, now seen corresponding path program 1 times [2021-11-03 03:55:16,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:55:16,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448467363] [2021-11-03 03:55:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:16,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:55:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:55:16,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:55:16,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448467363] [2021-11-03 03:55:16,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448467363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:16,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:16,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:55:16,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639074144] [2021-11-03 03:55:16,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:55:16,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:55:16,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:55:16,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:55:16,476 INFO L87 Difference]: Start difference. First operand 6369 states and 8951 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:17,235 INFO L93 Difference]: Finished difference Result 11662 states and 16386 transitions. [2021-11-03 03:55:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:55:17,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-03 03:55:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:17,243 INFO L225 Difference]: With dead ends: 11662 [2021-11-03 03:55:17,244 INFO L226 Difference]: Without dead ends: 6934 [2021-11-03 03:55:17,249 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:55:17,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-11-03 03:55:17,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 6301. [2021-11-03 03:55:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6301 states, 6300 states have (on average 1.4003174603174604) internal successors, (8822), 6300 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:17,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6301 states to 6301 states and 8822 transitions. [2021-11-03 03:55:17,842 INFO L78 Accepts]: Start accepts. Automaton has 6301 states and 8822 transitions. Word has length 132 [2021-11-03 03:55:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:17,842 INFO L470 AbstractCegarLoop]: Abstraction has 6301 states and 8822 transitions. [2021-11-03 03:55:17,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 6301 states and 8822 transitions. [2021-11-03 03:55:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-03 03:55:17,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:17,847 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:17,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 03:55:17,848 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:55:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash 228857818, now seen corresponding path program 1 times [2021-11-03 03:55:17,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:55:17,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378710515] [2021-11-03 03:55:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:17,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:55:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:55:17,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:55:17,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378710515] [2021-11-03 03:55:17,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378710515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:17,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:17,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:55:17,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912573095] [2021-11-03 03:55:17,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:55:17,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:55:17,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:55:17,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:55:17,898 INFO L87 Difference]: Start difference. First operand 6301 states and 8822 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:18,589 INFO L93 Difference]: Finished difference Result 10977 states and 15409 transitions. [2021-11-03 03:55:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:55:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-03 03:55:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:18,595 INFO L225 Difference]: With dead ends: 10977 [2021-11-03 03:55:18,596 INFO L226 Difference]: Without dead ends: 6370 [2021-11-03 03:55:18,599 INFO L786 BasicCegarLoop]: 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 [2021-11-03 03:55:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6370 states. [2021-11-03 03:55:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6370 to 6205. [2021-11-03 03:55:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6205 states, 6204 states have (on average 1.3965183752417796) internal successors, (8664), 6204 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6205 states to 6205 states and 8664 transitions. [2021-11-03 03:55:19,071 INFO L78 Accepts]: Start accepts. Automaton has 6205 states and 8664 transitions. Word has length 132 [2021-11-03 03:55:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:19,072 INFO L470 AbstractCegarLoop]: Abstraction has 6205 states and 8664 transitions. [2021-11-03 03:55:19,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 6205 states and 8664 transitions. [2021-11-03 03:55:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 03:55:19,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:19,076 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:19,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-03 03:55:19,077 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:55:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:19,077 INFO L85 PathProgramCache]: Analyzing trace with hash 190276819, now seen corresponding path program 1 times [2021-11-03 03:55:19,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:55:19,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897413479] [2021-11-03 03:55:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:19,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:55:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:55:24,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:55:24,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897413479] [2021-11-03 03:55:24,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897413479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:24,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:24,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-03 03:55:24,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268869506] [2021-11-03 03:55:24,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-03 03:55:24,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:55:24,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-03 03:55:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 03:55:24,166 INFO L87 Difference]: Start difference. First operand 6205 states and 8664 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:55:39,298 INFO L93 Difference]: Finished difference Result 16740 states and 23836 transitions. [2021-11-03 03:55:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-03 03:55:39,301 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 03:55:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:55:39,325 INFO L225 Difference]: With dead ends: 16740 [2021-11-03 03:55:39,325 INFO L226 Difference]: Without dead ends: 15069 [2021-11-03 03:55:39,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1033, Invalid=6449, Unknown=0, NotChecked=0, Total=7482 [2021-11-03 03:55:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15069 states. [2021-11-03 03:55:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15069 to 12981. [2021-11-03 03:55:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12981 states, 12980 states have (on average 1.4339753466872112) internal successors, (18613), 12980 states have internal predecessors, (18613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12981 states to 12981 states and 18613 transitions. [2021-11-03 03:55:41,173 INFO L78 Accepts]: Start accepts. Automaton has 12981 states and 18613 transitions. Word has length 134 [2021-11-03 03:55:41,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:55:41,173 INFO L470 AbstractCegarLoop]: Abstraction has 12981 states and 18613 transitions. [2021-11-03 03:55:41,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:55:41,174 INFO L276 IsEmpty]: Start isEmpty. Operand 12981 states and 18613 transitions. [2021-11-03 03:55:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 03:55:41,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:55:41,178 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:55:41,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-03 03:55:41,179 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:55:41,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:55:41,179 INFO L85 PathProgramCache]: Analyzing trace with hash -664181913, now seen corresponding path program 1 times [2021-11-03 03:55:41,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:55:41,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48150020] [2021-11-03 03:55:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:41,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:55:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:55:47,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:55:47,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48150020] [2021-11-03 03:55:47,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48150020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:55:47,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:55:47,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-11-03 03:55:47,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976291800] [2021-11-03 03:55:47,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-03 03:55:47,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:55:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-03 03:55:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 03:55:47,825 INFO L87 Difference]: Start difference. First operand 12981 states and 18613 transitions. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:56:05,098 INFO L93 Difference]: Finished difference Result 34061 states and 49659 transitions. [2021-11-03 03:56:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-03 03:56:05,099 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 03:56:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:56:05,141 INFO L225 Difference]: With dead ends: 34061 [2021-11-03 03:56:05,141 INFO L226 Difference]: Without dead ends: 26643 [2021-11-03 03:56:05,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=808, Invalid=4304, Unknown=0, NotChecked=0, Total=5112 [2021-11-03 03:56:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26643 states. [2021-11-03 03:56:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26643 to 20545. [2021-11-03 03:56:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 1.4446066978193146) internal successors, (29678), 20544 states have internal predecessors, (29678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 29678 transitions. [2021-11-03 03:56:08,521 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 29678 transitions. Word has length 134 [2021-11-03 03:56:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:56:08,521 INFO L470 AbstractCegarLoop]: Abstraction has 20545 states and 29678 transitions. [2021-11-03 03:56:08,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:56:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 29678 transitions. [2021-11-03 03:56:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 03:56:08,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:56:08,526 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:56:08,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-03 03:56:08,526 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:56:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:56:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1187251943, now seen corresponding path program 1 times [2021-11-03 03:56:08,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:56:08,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165013088] [2021-11-03 03:56:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:56:08,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:56:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:56:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:56:13,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:56:13,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165013088] [2021-11-03 03:56:13,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165013088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:56:13,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:56:13,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-03 03:56:13,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967240300] [2021-11-03 03:56:13,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-03 03:56:13,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:56:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-03 03:56:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 03:56:13,871 INFO L87 Difference]: Start difference. First operand 20545 states and 29678 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:57:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:57:31,659 INFO L93 Difference]: Finished difference Result 91096 states and 131242 transitions. [2021-11-03 03:57:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-11-03 03:57:31,660 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 03:57:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:57:31,830 INFO L225 Difference]: With dead ends: 91096 [2021-11-03 03:57:31,830 INFO L226 Difference]: Without dead ends: 86799 [2021-11-03 03:57:31,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14000 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=5219, Invalid=32611, Unknown=0, NotChecked=0, Total=37830 [2021-11-03 03:57:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86799 states. [2021-11-03 03:57:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86799 to 31662. [2021-11-03 03:57:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31662 states, 31661 states have (on average 1.4636303338492151) internal successors, (46340), 31661 states have internal predecessors, (46340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:57:39,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31662 states to 31662 states and 46340 transitions. [2021-11-03 03:57:39,121 INFO L78 Accepts]: Start accepts. Automaton has 31662 states and 46340 transitions. Word has length 134 [2021-11-03 03:57:39,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:57:39,121 INFO L470 AbstractCegarLoop]: Abstraction has 31662 states and 46340 transitions. [2021-11-03 03:57:39,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:57:39,121 INFO L276 IsEmpty]: Start isEmpty. Operand 31662 states and 46340 transitions. [2021-11-03 03:57:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 03:57:39,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:57:39,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:57:39,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-03 03:57:39,127 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:57:39,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:57:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1080483705, now seen corresponding path program 1 times [2021-11-03 03:57:39,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:57:39,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212342103] [2021-11-03 03:57:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:57:39,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:57:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:57:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:57:45,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:57:45,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212342103] [2021-11-03 03:57:45,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212342103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:57:45,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:57:45,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-11-03 03:57:45,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749441213] [2021-11-03 03:57:45,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-03 03:57:45,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:57:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-03 03:57:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 03:57:45,435 INFO L87 Difference]: Start difference. First operand 31662 states and 46340 transitions. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:02,743 INFO L93 Difference]: Finished difference Result 43536 states and 63717 transitions. [2021-11-03 03:58:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-03 03:58:02,744 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 03:58:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:02,807 INFO L225 Difference]: With dead ends: 43536 [2021-11-03 03:58:02,807 INFO L226 Difference]: Without dead ends: 37659 [2021-11-03 03:58:02,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=597, Invalid=3825, Unknown=0, NotChecked=0, Total=4422 [2021-11-03 03:58:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37659 states. [2021-11-03 03:58:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37659 to 34678. [2021-11-03 03:58:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34678 states, 34677 states have (on average 1.4620930299622228) internal successors, (50701), 34677 states have internal predecessors, (50701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34678 states to 34678 states and 50701 transitions. [2021-11-03 03:58:09,513 INFO L78 Accepts]: Start accepts. Automaton has 34678 states and 50701 transitions. Word has length 134 [2021-11-03 03:58:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:09,514 INFO L470 AbstractCegarLoop]: Abstraction has 34678 states and 50701 transitions. [2021-11-03 03:58:09,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 34678 states and 50701 transitions. [2021-11-03 03:58:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 03:58:09,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:09,517 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:58:09,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-03 03:58:09,518 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:58:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:09,519 INFO L85 PathProgramCache]: Analyzing trace with hash -689081663, now seen corresponding path program 1 times [2021-11-03 03:58:09,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:58:09,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111131310] [2021-11-03 03:58:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:09,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:58:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:16,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:58:16,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111131310] [2021-11-03 03:58:16,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111131310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:16,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:16,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-03 03:58:16,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647399008] [2021-11-03 03:58:16,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-03 03:58:16,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:58:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-03 03:58:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 03:58:16,262 INFO L87 Difference]: Start difference. First operand 34678 states and 50701 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:58:40,709 INFO L93 Difference]: Finished difference Result 65621 states and 96346 transitions. [2021-11-03 03:58:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-03 03:58:40,709 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 03:58:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:58:40,823 INFO L225 Difference]: With dead ends: 65621 [2021-11-03 03:58:40,823 INFO L226 Difference]: Without dead ends: 58297 [2021-11-03 03:58:40,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=707, Invalid=4405, Unknown=0, NotChecked=0, Total=5112 [2021-11-03 03:58:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58297 states. [2021-11-03 03:58:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58297 to 34611. [2021-11-03 03:58:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34611 states, 34610 states have (on average 1.4625541750939035) internal successors, (50619), 34610 states have internal predecessors, (50619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34611 states to 34611 states and 50619 transitions. [2021-11-03 03:58:48,293 INFO L78 Accepts]: Start accepts. Automaton has 34611 states and 50619 transitions. Word has length 134 [2021-11-03 03:58:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:58:48,294 INFO L470 AbstractCegarLoop]: Abstraction has 34611 states and 50619 transitions. [2021-11-03 03:58:48,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:58:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 34611 states and 50619 transitions. [2021-11-03 03:58:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 03:58:48,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:58:48,297 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:58:48,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-03 03:58:48,297 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:58:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:58:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1860384615, now seen corresponding path program 1 times [2021-11-03 03:58:48,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:58:48,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461513200] [2021-11-03 03:58:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:58:48,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:58:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:58:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:58:54,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:58:54,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461513200] [2021-11-03 03:58:54,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461513200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:58:54,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:58:54,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-03 03:58:54,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661810532] [2021-11-03 03:58:54,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-03 03:58:54,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:58:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-03 03:58:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 03:58:54,081 INFO L87 Difference]: Start difference. First operand 34611 states and 50619 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:59:20,521 INFO L93 Difference]: Finished difference Result 63672 states and 93564 transitions. [2021-11-03 03:59:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-03 03:59:20,521 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 03:59:20,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:59:20,625 INFO L225 Difference]: With dead ends: 63672 [2021-11-03 03:59:20,625 INFO L226 Difference]: Without dead ends: 58004 [2021-11-03 03:59:20,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=854, Invalid=5626, Unknown=0, NotChecked=0, Total=6480 [2021-11-03 03:59:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58004 states. [2021-11-03 03:59:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58004 to 34616. [2021-11-03 03:59:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34616 states, 34615 states have (on average 1.4625162501805575) internal successors, (50625), 34615 states have internal predecessors, (50625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34616 states to 34616 states and 50625 transitions. [2021-11-03 03:59:27,811 INFO L78 Accepts]: Start accepts. Automaton has 34616 states and 50625 transitions. Word has length 134 [2021-11-03 03:59:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:59:27,812 INFO L470 AbstractCegarLoop]: Abstraction has 34616 states and 50625 transitions. [2021-11-03 03:59:27,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:59:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 34616 states and 50625 transitions. [2021-11-03 03:59:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-03 03:59:27,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:59:27,815 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:59:27,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-03 03:59:27,815 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:59:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:59:27,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1664892636, now seen corresponding path program 1 times [2021-11-03 03:59:27,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:59:27,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536325099] [2021-11-03 03:59:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:59:27,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:59:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:59:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:59:27,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:59:27,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536325099] [2021-11-03 03:59:27,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536325099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:59:27,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:59:27,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:59:27,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297485698] [2021-11-03 03:59:27,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:59:27,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:59:27,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:59:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:59:27,883 INFO L87 Difference]: Start difference. First operand 34616 states and 50625 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)