./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl --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 b178b656343d0e2ffc6b5c87d592ef5d1e640f986fa3fd9fab639777f6d58eb8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:53:19,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:53:19,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:53:19,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:53:19,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:53:19,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:53:19,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:53:19,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:53:19,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:53:19,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:53:19,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:53:19,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:53:19,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:53:19,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:53:19,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:53:19,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:53:19,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:53:19,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:53:19,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:53:19,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:53:19,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:53:19,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:53:19,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:53:19,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:53:19,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:53:19,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:53:19,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:53:19,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:53:19,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:53:19,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:53:19,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:53:19,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:53:19,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:53:19,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:53:19,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:53:19,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:53:19,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:53:19,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:53:19,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:53:19,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:53:19,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:53:19,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:53:19,801 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:53:19,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:53:19,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:53:19,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:53:19,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:53:19,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:53:19,812 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:53:19,812 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:53:19,813 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:53:19,813 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:53:19,814 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:53:19,815 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:53:19,815 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:53:19,815 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:53:19,816 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:53:19,816 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:53:19,816 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:53:19,816 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:53:19,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:53:19,819 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:53:19,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:53:19,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:53:19,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:53:19,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:53:19,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:53:19,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:53:19,822 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:53:19,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:53:19,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:53:19,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:53:19,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:53:19,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:53:19,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:53:19,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:53:19,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:53:19,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:53:19,826 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:53:19,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:53:19,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:53:19,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:53:19,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:53:19,827 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_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b178b656343d0e2ffc6b5c87d592ef5d1e640f986fa3fd9fab639777f6d58eb8 [2021-11-23 16:53:20,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:53:20,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:53:20,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:53:20,221 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:53:20,222 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:53:20,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 16:53:20,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data/433bd9054/72387c0a227045bab5d56fd30724ddf8/FLAG60a84d88b [2021-11-23 16:53:20,870 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:53:20,871 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 16:53:20,885 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data/433bd9054/72387c0a227045bab5d56fd30724ddf8/FLAG60a84d88b [2021-11-23 16:53:21,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data/433bd9054/72387c0a227045bab5d56fd30724ddf8 [2021-11-23 16:53:21,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:53:21,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:53:21,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:53:21,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:53:21,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:53:21,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:21,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d8d0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21, skipping insertion in model container [2021-11-23 16:53:21,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:21,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:53:21,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:53:21,609 WARN L230 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_33224e21-befb-45d1-9689-e176c044aed8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2021-11-23 16:53:21,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:53:21,723 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:53:21,837 WARN L230 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_33224e21-befb-45d1-9689-e176c044aed8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2021-11-23 16:53:21,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:53:21,902 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:53:21,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21 WrapperNode [2021-11-23 16:53:21,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:53:21,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:53:21,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:53:21,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:53:21,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:21,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:22,045 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 590 [2021-11-23 16:53:22,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:53:22,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:53:22,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:53:22,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:53:22,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:22,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:22,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:22,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:22,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:22,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:22,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:22,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:53:22,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:53:22,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:53:22,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:53:22,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:21" (1/1) ... [2021-11-23 16:53:22,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:53:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:22,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:53:22,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:53:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:53:22,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:53:22,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:53:22,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:53:22,410 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:53:22,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:53:23,150 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:53:23,206 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:53:23,213 INFO L158 Benchmark]: Toolchain (without parser) took 2015.11ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 52.0MB in the beginning and 36.4MB in the end (delta: 15.6MB). Peak memory consumption was 33.7MB. Max. memory is 16.1GB. [2021-11-23 16:53:23,214 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 69.4MB in the beginning and 69.4MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:53:23,215 INFO L158 Benchmark]: CACSL2BoogieTranslator took 700.93ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 51.8MB in the beginning and 77.0MB in the end (delta: -25.3MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-11-23 16:53:23,216 INFO L158 Benchmark]: Boogie Procedure Inliner took 141.40ms. Allocated memory is still 111.1MB. Free memory was 77.0MB in the beginning and 74.2MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:53:23,218 INFO L158 Benchmark]: Boogie Preprocessor took 80.93ms. Allocated memory is still 111.1MB. Free memory was 74.0MB in the beginning and 72.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:53:23,219 INFO L158 Benchmark]: RCFGBuilder took 1081.88ms. Allocated memory is still 111.1MB. Free memory was 71.9MB in the beginning and 36.4MB in the end (delta: 35.5MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2021-11-23 16:53:23,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 69.4MB in the beginning and 69.4MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 700.93ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 51.8MB in the beginning and 77.0MB in the end (delta: -25.3MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 141.40ms. Allocated memory is still 111.1MB. Free memory was 77.0MB in the beginning and 74.2MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 80.93ms. Allocated memory is still 111.1MB. Free memory was 74.0MB in the beginning and 72.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1081.88ms. Allocated memory is still 111.1MB. Free memory was 71.9MB in the beginning and 36.4MB in the end (delta: 35.5MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:53:23,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl --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 b178b656343d0e2ffc6b5c87d592ef5d1e640f986fa3fd9fab639777f6d58eb8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:53:26,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:53:26,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:53:26,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:53:26,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:53:26,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:53:26,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:53:26,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:53:26,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:53:26,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:53:26,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:53:26,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:53:26,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:53:26,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:53:26,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:53:26,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:53:26,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:53:26,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:53:26,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:53:26,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:53:26,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:53:26,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:53:26,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:53:26,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:53:26,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:53:26,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:53:26,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:53:26,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:53:26,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:53:26,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:53:26,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:53:26,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:53:26,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:53:26,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:53:26,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:53:26,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:53:26,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:53:26,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:53:26,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:53:26,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:53:26,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:53:26,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:53:26,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:53:26,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:53:26,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:53:26,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:53:26,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:53:26,552 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:53:26,552 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:53:26,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:53:26,553 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:53:26,553 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:53:26,553 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:53:26,554 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:53:26,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:53:26,555 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:53:26,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:53:26,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:53:26,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:53:26,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:53:26,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:53:26,556 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:53:26,556 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:53:26,556 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:53:26,556 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:53:26,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:53:26,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:53:26,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:53:26,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:53:26,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:53:26,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:53:26,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:53:26,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:53:26,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:53:26,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:53:26,559 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:53:26,560 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:26,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:53:26,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:53:26,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:53:26,561 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b178b656343d0e2ffc6b5c87d592ef5d1e640f986fa3fd9fab639777f6d58eb8 [2021-11-23 16:53:26,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:53:27,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:53:27,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:53:27,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:53:27,022 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:53:27,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 16:53:27,106 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data/256a321a1/f102a0a176914e7da40c44c50b5bf8a2/FLAG4a612d423 [2021-11-23 16:53:27,923 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:53:27,929 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 16:53:27,943 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data/256a321a1/f102a0a176914e7da40c44c50b5bf8a2/FLAG4a612d423 [2021-11-23 16:53:28,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/data/256a321a1/f102a0a176914e7da40c44c50b5bf8a2 [2021-11-23 16:53:28,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:53:28,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:53:28,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:53:28,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:53:28,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:53:28,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:28,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bc8866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28, skipping insertion in model container [2021-11-23 16:53:28,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:28,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:53:28,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:53:28,709 WARN L230 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_33224e21-befb-45d1-9689-e176c044aed8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2021-11-23 16:53:28,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:53:28,821 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:53:28,918 WARN L230 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_33224e21-befb-45d1-9689-e176c044aed8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2021-11-23 16:53:28,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:53:28,973 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:53:28,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28 WrapperNode [2021-11-23 16:53:28,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:53:28,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:53:28,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:53:28,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:53:28,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,081 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 575 [2021-11-23 16:53:29,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:53:29,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:53:29,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:53:29,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:53:29,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:53:29,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:53:29,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:53:29,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:53:29,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (1/1) ... [2021-11-23 16:53:29,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:53:29,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:29,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:53:29,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:53:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:53:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:53:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:53:29,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:53:29,494 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:53:29,496 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:53:30,164 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:53:30,174 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:53:30,175 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 16:53:30,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:53:30 BoogieIcfgContainer [2021-11-23 16:53:30,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:53:30,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:53:30,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:53:30,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:53:30,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:53:28" (1/3) ... [2021-11-23 16:53:30,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1c961d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:53:30, skipping insertion in model container [2021-11-23 16:53:30,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:53:28" (2/3) ... [2021-11-23 16:53:30,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1c961d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:53:30, skipping insertion in model container [2021-11-23 16:53:30,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:53:30" (3/3) ... [2021-11-23 16:53:30,187 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-23 16:53:30,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:53:30,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:53:30,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:53:30,271 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 [2021-11-23 16:53:30,271 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:53:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.7608695652173914) internal successors, (243), 139 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 16:53:30,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:30,301 INFO L514 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] [2021-11-23 16:53:30,302 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1890044597, now seen corresponding path program 1 times [2021-11-23 16:53:30,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:30,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542781239] [2021-11-23 16:53:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:30,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:30,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:30,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:30,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:53:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:30,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:30,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:30,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:30,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:30,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542781239] [2021-11-23 16:53:30,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542781239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:30,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:30,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:53:30,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571527470] [2021-11-23 16:53:30,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:30,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:30,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:30,837 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.7608695652173914) internal successors, (243), 139 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:31,018 INFO L93 Difference]: Finished difference Result 293 states and 496 transitions. [2021-11-23 16:53:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-23 16:53:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:31,047 INFO L225 Difference]: With dead ends: 293 [2021-11-23 16:53:31,047 INFO L226 Difference]: Without dead ends: 201 [2021-11-23 16:53:31,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:31,056 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 138 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:31,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 402 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:53:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-23 16:53:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2021-11-23 16:53:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.5786802030456852) internal successors, (311), 197 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 311 transitions. [2021-11-23 16:53:31,156 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 311 transitions. Word has length 56 [2021-11-23 16:53:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:31,158 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 311 transitions. [2021-11-23 16:53:31,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 311 transitions. [2021-11-23 16:53:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 16:53:31,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:31,172 INFO L514 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] [2021-11-23 16:53:31,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:31,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:31,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1610685192, now seen corresponding path program 1 times [2021-11-23 16:53:31,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:31,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722340433] [2021-11-23 16:53:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:31,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:31,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:31,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:53:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:31,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:53:31,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:31,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:31,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:31,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722340433] [2021-11-23 16:53:31,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722340433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:31,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:31,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:31,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837054507] [2021-11-23 16:53:31,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:31,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:31,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:31,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:53:31,755 INFO L87 Difference]: Start difference. First operand 198 states and 311 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:31,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:31,876 INFO L93 Difference]: Finished difference Result 573 states and 898 transitions. [2021-11-23 16:53:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:53:31,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 16:53:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:31,884 INFO L225 Difference]: With dead ends: 573 [2021-11-23 16:53:31,884 INFO L226 Difference]: Without dead ends: 384 [2021-11-23 16:53:31,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:31,891 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 458 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:31,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 491 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-23 16:53:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 382. [2021-11-23 16:53:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.5643044619422573) internal successors, (596), 381 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 596 transitions. [2021-11-23 16:53:31,946 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 596 transitions. Word has length 58 [2021-11-23 16:53:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:31,947 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 596 transitions. [2021-11-23 16:53:31,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 596 transitions. [2021-11-23 16:53:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 16:53:31,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:31,950 INFO L514 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] [2021-11-23 16:53:31,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:32,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:32,161 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash 523855628, now seen corresponding path program 1 times [2021-11-23 16:53:32,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:32,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028557472] [2021-11-23 16:53:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:32,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:32,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:32,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:32,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:53:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:32,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:32,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028557472] [2021-11-23 16:53:32,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028557472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:32,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:32,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:53:32,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196144267] [2021-11-23 16:53:32,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:32,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:32,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:32,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:32,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:32,384 INFO L87 Difference]: Start difference. First operand 382 states and 596 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:32,490 INFO L93 Difference]: Finished difference Result 1108 states and 1726 transitions. [2021-11-23 16:53:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:32,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-23 16:53:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:32,496 INFO L225 Difference]: With dead ends: 1108 [2021-11-23 16:53:32,496 INFO L226 Difference]: Without dead ends: 754 [2021-11-23 16:53:32,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:32,499 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 201 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:32,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 613 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-11-23 16:53:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 384. [2021-11-23 16:53:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.5613577023498695) internal successors, (598), 383 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 598 transitions. [2021-11-23 16:53:32,569 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 598 transitions. Word has length 59 [2021-11-23 16:53:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:32,571 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 598 transitions. [2021-11-23 16:53:32,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 598 transitions. [2021-11-23 16:53:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 16:53:32,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:32,573 INFO L514 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] [2021-11-23 16:53:32,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:32,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:32,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash 707697610, now seen corresponding path program 1 times [2021-11-23 16:53:32,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:32,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647975951] [2021-11-23 16:53:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:32,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:32,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:32,789 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:32,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:53:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:32,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:53:32,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:33,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:33,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:33,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647975951] [2021-11-23 16:53:33,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647975951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:33,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:33,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:33,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471024344] [2021-11-23 16:53:33,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:33,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:33,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:53:33,072 INFO L87 Difference]: Start difference. First operand 384 states and 598 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:33,176 INFO L93 Difference]: Finished difference Result 1114 states and 1736 transitions. [2021-11-23 16:53:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:53:33,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-23 16:53:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:33,183 INFO L225 Difference]: With dead ends: 1114 [2021-11-23 16:53:33,183 INFO L226 Difference]: Without dead ends: 742 [2021-11-23 16:53:33,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:33,186 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 461 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:33,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 480 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-23 16:53:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 740. [2021-11-23 16:53:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.5493910690121786) internal successors, (1145), 739 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1145 transitions. [2021-11-23 16:53:33,246 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1145 transitions. Word has length 60 [2021-11-23 16:53:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:33,247 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1145 transitions. [2021-11-23 16:53:33,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1145 transitions. [2021-11-23 16:53:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 16:53:33,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:33,250 INFO L514 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] [2021-11-23 16:53:33,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:33,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:33,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:33,462 INFO L85 PathProgramCache]: Analyzing trace with hash 153022585, now seen corresponding path program 1 times [2021-11-23 16:53:33,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:33,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592823143] [2021-11-23 16:53:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:33,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:33,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:33,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:33,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:53:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:33,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:53:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:33,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:33,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592823143] [2021-11-23 16:53:33,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592823143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:33,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:33,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:33,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436988608] [2021-11-23 16:53:33,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:33,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:33,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:33,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:33,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:53:33,730 INFO L87 Difference]: Start difference. First operand 740 states and 1145 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:33,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:33,795 INFO L93 Difference]: Finished difference Result 1286 states and 1986 transitions. [2021-11-23 16:53:33,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:53:33,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-23 16:53:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:33,799 INFO L225 Difference]: With dead ends: 1286 [2021-11-23 16:53:33,800 INFO L226 Difference]: Without dead ends: 562 [2021-11-23 16:53:33,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:33,802 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 69 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:33,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 667 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:33,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-23 16:53:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-23 16:53:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 1.5401069518716577) internal successors, (864), 561 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 864 transitions. [2021-11-23 16:53:33,849 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 864 transitions. Word has length 60 [2021-11-23 16:53:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:33,849 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 864 transitions. [2021-11-23 16:53:33,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 864 transitions. [2021-11-23 16:53:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 16:53:33,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:33,852 INFO L514 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] [2021-11-23 16:53:33,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:34,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:34,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash -572674500, now seen corresponding path program 1 times [2021-11-23 16:53:34,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:34,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590235928] [2021-11-23 16:53:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:34,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:34,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:34,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:34,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:53:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:34,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:34,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:34,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:34,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590235928] [2021-11-23 16:53:34,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590235928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:34,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:34,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:53:34,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524807569] [2021-11-23 16:53:34,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:34,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:34,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:34,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:34,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:34,252 INFO L87 Difference]: Start difference. First operand 562 states and 864 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:34,329 INFO L93 Difference]: Finished difference Result 1161 states and 1858 transitions. [2021-11-23 16:53:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:34,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-23 16:53:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:34,337 INFO L225 Difference]: With dead ends: 1161 [2021-11-23 16:53:34,337 INFO L226 Difference]: Without dead ends: 745 [2021-11-23 16:53:34,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:34,343 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 122 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:34,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 484 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-11-23 16:53:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2021-11-23 16:53:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.5741239892183287) internal successors, (1168), 742 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1168 transitions. [2021-11-23 16:53:34,404 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1168 transitions. Word has length 60 [2021-11-23 16:53:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:34,405 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1168 transitions. [2021-11-23 16:53:34,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1168 transitions. [2021-11-23 16:53:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 16:53:34,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:34,407 INFO L514 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] [2021-11-23 16:53:34,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:34,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:34,618 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash 745326323, now seen corresponding path program 1 times [2021-11-23 16:53:34,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:34,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183557342] [2021-11-23 16:53:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:34,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:34,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:34,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:34,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:53:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:34,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:53:34,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:35,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:35,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183557342] [2021-11-23 16:53:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183557342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:35,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:35,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:35,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76672996] [2021-11-23 16:53:35,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:35,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:53:35,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:35,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:53:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:35,286 INFO L87 Difference]: Start difference. First operand 743 states and 1168 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:35,451 INFO L93 Difference]: Finished difference Result 1152 states and 1841 transitions. [2021-11-23 16:53:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:53:35,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 16:53:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:35,459 INFO L225 Difference]: With dead ends: 1152 [2021-11-23 16:53:35,459 INFO L226 Difference]: Without dead ends: 753 [2021-11-23 16:53:35,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:53:35,461 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 54 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:35,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 617 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-11-23 16:53:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-23 16:53:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 747. [2021-11-23 16:53:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 1.5723860589812333) internal successors, (1173), 746 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1173 transitions. [2021-11-23 16:53:35,542 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1173 transitions. Word has length 63 [2021-11-23 16:53:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:35,544 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1173 transitions. [2021-11-23 16:53:35,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1173 transitions. [2021-11-23 16:53:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 16:53:35,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:35,546 INFO L514 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] [2021-11-23 16:53:35,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:35,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:35,757 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1923476306, now seen corresponding path program 1 times [2021-11-23 16:53:35,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:35,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75337656] [2021-11-23 16:53:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:35,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:35,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:35,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:35,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:53:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:36,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:36,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:36,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75337656] [2021-11-23 16:53:36,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75337656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:36,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:36,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:53:36,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981861148] [2021-11-23 16:53:36,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:36,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:36,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:36,012 INFO L87 Difference]: Start difference. First operand 747 states and 1173 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:36,130 INFO L93 Difference]: Finished difference Result 1875 states and 3036 transitions. [2021-11-23 16:53:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:36,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 16:53:36,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:36,138 INFO L225 Difference]: With dead ends: 1875 [2021-11-23 16:53:36,139 INFO L226 Difference]: Without dead ends: 1281 [2021-11-23 16:53:36,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:36,141 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 115 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:36,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 395 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-11-23 16:53:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1270. [2021-11-23 16:53:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 1.594956658786446) internal successors, (2024), 1269 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2024 transitions. [2021-11-23 16:53:36,260 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2024 transitions. Word has length 63 [2021-11-23 16:53:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:36,261 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 2024 transitions. [2021-11-23 16:53:36,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2024 transitions. [2021-11-23 16:53:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 16:53:36,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:36,266 INFO L514 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] [2021-11-23 16:53:36,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 16:53:36,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:36,479 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:36,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:36,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1072518113, now seen corresponding path program 1 times [2021-11-23 16:53:36,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:36,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481159570] [2021-11-23 16:53:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:36,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:36,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:36,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:36,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:53:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:53:36,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:36,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:36,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:36,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481159570] [2021-11-23 16:53:36,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481159570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:36,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:36,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:36,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058065884] [2021-11-23 16:53:36,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:36,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:36,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:53:36,799 INFO L87 Difference]: Start difference. First operand 1270 states and 2024 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:37,065 INFO L93 Difference]: Finished difference Result 3671 states and 5859 transitions. [2021-11-23 16:53:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:53:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-23 16:53:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:37,081 INFO L225 Difference]: With dead ends: 3671 [2021-11-23 16:53:37,081 INFO L226 Difference]: Without dead ends: 2436 [2021-11-23 16:53:37,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:37,085 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 425 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:37,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 477 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-11-23 16:53:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2434. [2021-11-23 16:53:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2433 states have (on average 1.5856966707768188) internal successors, (3858), 2433 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3858 transitions. [2021-11-23 16:53:37,315 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3858 transitions. Word has length 65 [2021-11-23 16:53:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:37,316 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 3858 transitions. [2021-11-23 16:53:37,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3858 transitions. [2021-11-23 16:53:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 16:53:37,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:37,319 INFO L514 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] [2021-11-23 16:53:37,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:37,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:37,532 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:37,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1576549935, now seen corresponding path program 1 times [2021-11-23 16:53:37,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:37,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707165027] [2021-11-23 16:53:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:37,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:37,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:37,535 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:37,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:53:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:37,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:37,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:37,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:37,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707165027] [2021-11-23 16:53:37,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707165027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:37,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:37,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:53:37,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490781072] [2021-11-23 16:53:37,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:37,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:37,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:37,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:37,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:37,770 INFO L87 Difference]: Start difference. First operand 2434 states and 3858 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:38,336 INFO L93 Difference]: Finished difference Result 7208 states and 11433 transitions. [2021-11-23 16:53:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-23 16:53:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:38,373 INFO L225 Difference]: With dead ends: 7208 [2021-11-23 16:53:38,373 INFO L226 Difference]: Without dead ends: 4830 [2021-11-23 16:53:38,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:38,379 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 187 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:38,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 508 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-11-23 16:53:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 2440. [2021-11-23 16:53:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 1.5842558425584257) internal successors, (3864), 2439 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3864 transitions. [2021-11-23 16:53:38,705 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3864 transitions. Word has length 66 [2021-11-23 16:53:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:38,707 INFO L470 AbstractCegarLoop]: Abstraction has 2440 states and 3864 transitions. [2021-11-23 16:53:38,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3864 transitions. [2021-11-23 16:53:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 16:53:38,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:38,710 INFO L514 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] [2021-11-23 16:53:38,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 16:53:38,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:38,923 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:38,924 INFO L85 PathProgramCache]: Analyzing trace with hash -669199168, now seen corresponding path program 1 times [2021-11-23 16:53:38,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:38,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791162706] [2021-11-23 16:53:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:38,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:38,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:38,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:38,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:53:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:39,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:53:39,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:39,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:39,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791162706] [2021-11-23 16:53:39,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791162706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:39,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:39,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:39,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985473271] [2021-11-23 16:53:39,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:39,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:39,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:53:39,195 INFO L87 Difference]: Start difference. First operand 2440 states and 3864 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:39,431 INFO L93 Difference]: Finished difference Result 4842 states and 7675 transitions. [2021-11-23 16:53:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:53:39,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 16:53:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:39,450 INFO L225 Difference]: With dead ends: 4842 [2021-11-23 16:53:39,450 INFO L226 Difference]: Without dead ends: 2434 [2021-11-23 16:53:39,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:39,456 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 47 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:39,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 648 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-11-23 16:53:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2434. [2021-11-23 16:53:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2433 states have (on average 1.5832305795314427) internal successors, (3852), 2433 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3852 transitions. [2021-11-23 16:53:39,794 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3852 transitions. Word has length 67 [2021-11-23 16:53:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:39,794 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 3852 transitions. [2021-11-23 16:53:39,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3852 transitions. [2021-11-23 16:53:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 16:53:39,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:39,798 INFO L514 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] [2021-11-23 16:53:39,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:40,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:40,010 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1951337493, now seen corresponding path program 1 times [2021-11-23 16:53:40,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:40,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723514190] [2021-11-23 16:53:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:40,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:40,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:40,013 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:40,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:53:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:40,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:53:40,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:40,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:40,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723514190] [2021-11-23 16:53:40,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723514190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:40,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:40,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:40,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14035423] [2021-11-23 16:53:40,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:40,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:53:40,272 INFO L87 Difference]: Start difference. First operand 2434 states and 3852 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:40,661 INFO L93 Difference]: Finished difference Result 5978 states and 9455 transitions. [2021-11-23 16:53:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:53:40,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 16:53:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:40,697 INFO L225 Difference]: With dead ends: 5978 [2021-11-23 16:53:40,697 INFO L226 Difference]: Without dead ends: 3581 [2021-11-23 16:53:40,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:40,708 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 506 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:40,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 384 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2021-11-23 16:53:41,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 3578. [2021-11-23 16:53:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 1.5582890690522784) internal successors, (5574), 3577 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 5574 transitions. [2021-11-23 16:53:41,080 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 5574 transitions. Word has length 67 [2021-11-23 16:53:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:41,080 INFO L470 AbstractCegarLoop]: Abstraction has 3578 states and 5574 transitions. [2021-11-23 16:53:41,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 5574 transitions. [2021-11-23 16:53:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 16:53:41,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:41,102 INFO L514 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] [2021-11-23 16:53:41,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:41,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:41,311 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1415451316, now seen corresponding path program 1 times [2021-11-23 16:53:41,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:41,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728141974] [2021-11-23 16:53:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:41,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:41,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:41,314 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:41,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:53:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:41,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:41,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:41,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:41,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728141974] [2021-11-23 16:53:41,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728141974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:41,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:41,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:53:41,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971187657] [2021-11-23 16:53:41,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:41,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:41,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:41,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:41,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:41,546 INFO L87 Difference]: Start difference. First operand 3578 states and 5574 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:42,018 INFO L93 Difference]: Finished difference Result 6570 states and 10448 transitions. [2021-11-23 16:53:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 16:53:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:42,080 INFO L225 Difference]: With dead ends: 6570 [2021-11-23 16:53:42,082 INFO L226 Difference]: Without dead ends: 4867 [2021-11-23 16:53:42,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:42,087 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 114 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:42,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 459 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4867 states. [2021-11-23 16:53:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4867 to 4865. [2021-11-23 16:53:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 1.571546052631579) internal successors, (7644), 4864 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 7644 transitions. [2021-11-23 16:53:42,593 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 7644 transitions. Word has length 67 [2021-11-23 16:53:42,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:42,593 INFO L470 AbstractCegarLoop]: Abstraction has 4865 states and 7644 transitions. [2021-11-23 16:53:42,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 7644 transitions. [2021-11-23 16:53:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 16:53:42,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:42,597 INFO L514 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] [2021-11-23 16:53:42,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:42,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:42,808 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash 783241640, now seen corresponding path program 1 times [2021-11-23 16:53:42,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:42,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735423889] [2021-11-23 16:53:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:42,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:42,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:42,811 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:42,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:53:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:53:42,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:43,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:43,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:43,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735423889] [2021-11-23 16:53:43,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735423889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:43,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:43,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:43,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131207993] [2021-11-23 16:53:43,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:43,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:53:43,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:43,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:53:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:43,457 INFO L87 Difference]: Start difference. First operand 4865 states and 7644 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:43,891 INFO L93 Difference]: Finished difference Result 6878 states and 10866 transitions. [2021-11-23 16:53:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:53:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 16:53:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:43,904 INFO L225 Difference]: With dead ends: 6878 [2021-11-23 16:53:43,904 INFO L226 Difference]: Without dead ends: 4884 [2021-11-23 16:53:43,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:53:43,911 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 57 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:43,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 502 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-23 16:53:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2021-11-23 16:53:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4872. [2021-11-23 16:53:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4871 states have (on average 1.5709299938411003) internal successors, (7652), 4871 states have internal predecessors, (7652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 7652 transitions. [2021-11-23 16:53:44,377 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 7652 transitions. Word has length 70 [2021-11-23 16:53:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:44,377 INFO L470 AbstractCegarLoop]: Abstraction has 4872 states and 7652 transitions. [2021-11-23 16:53:44,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 7652 transitions. [2021-11-23 16:53:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 16:53:44,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:44,381 INFO L514 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] [2021-11-23 16:53:44,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:44,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:44,598 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash 595875277, now seen corresponding path program 1 times [2021-11-23 16:53:44,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:44,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106558424] [2021-11-23 16:53:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:44,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:44,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:44,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:44,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:53:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:44,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:44,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:44,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:44,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106558424] [2021-11-23 16:53:44,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106558424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:44,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:44,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:53:44,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311097468] [2021-11-23 16:53:44,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:44,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:44,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:44,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:44,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:44,857 INFO L87 Difference]: Start difference. First operand 4872 states and 7652 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:45,430 INFO L93 Difference]: Finished difference Result 13129 states and 20983 transitions. [2021-11-23 16:53:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 16:53:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:45,454 INFO L225 Difference]: With dead ends: 13129 [2021-11-23 16:53:45,454 INFO L226 Difference]: Without dead ends: 8744 [2021-11-23 16:53:45,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:45,462 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 107 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:45,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 382 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2021-11-23 16:53:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 8661. [2021-11-23 16:53:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8661 states, 8660 states have (on average 1.5767898383371826) internal successors, (13655), 8660 states have internal predecessors, (13655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8661 states to 8661 states and 13655 transitions. [2021-11-23 16:53:46,196 INFO L78 Accepts]: Start accepts. Automaton has 8661 states and 13655 transitions. Word has length 70 [2021-11-23 16:53:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:46,197 INFO L470 AbstractCegarLoop]: Abstraction has 8661 states and 13655 transitions. [2021-11-23 16:53:46,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 8661 states and 13655 transitions. [2021-11-23 16:53:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 16:53:46,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:46,200 INFO L514 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] [2021-11-23 16:53:46,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:46,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:46,412 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash -747781446, now seen corresponding path program 1 times [2021-11-23 16:53:46,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:46,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251888720] [2021-11-23 16:53:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:46,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:46,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:46,416 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:46,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:53:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:46,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:46,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:46,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:46,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251888720] [2021-11-23 16:53:46,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251888720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:46,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:46,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:53:46,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623895078] [2021-11-23 16:53:46,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:46,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:46,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:46,644 INFO L87 Difference]: Start difference. First operand 8661 states and 13655 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:47,438 INFO L93 Difference]: Finished difference Result 22001 states and 34959 transitions. [2021-11-23 16:53:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:47,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 16:53:47,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:47,482 INFO L225 Difference]: With dead ends: 22001 [2021-11-23 16:53:47,482 INFO L226 Difference]: Without dead ends: 13827 [2021-11-23 16:53:47,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:47,497 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 129 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:47,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 543 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13827 states. [2021-11-23 16:53:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13827 to 13825. [2021-11-23 16:53:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13825 states, 13824 states have (on average 1.566478587962963) internal successors, (21655), 13824 states have internal predecessors, (21655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13825 states to 13825 states and 21655 transitions. [2021-11-23 16:53:48,477 INFO L78 Accepts]: Start accepts. Automaton has 13825 states and 21655 transitions. Word has length 72 [2021-11-23 16:53:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:48,477 INFO L470 AbstractCegarLoop]: Abstraction has 13825 states and 21655 transitions. [2021-11-23 16:53:48,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 13825 states and 21655 transitions. [2021-11-23 16:53:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 16:53:48,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:48,481 INFO L514 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] [2021-11-23 16:53:48,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:48,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:48,692 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:48,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1221954590, now seen corresponding path program 1 times [2021-11-23 16:53:48,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:48,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881220111] [2021-11-23 16:53:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:48,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:48,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:48,694 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:48,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:53:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:48,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:53:48,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:48,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:48,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881220111] [2021-11-23 16:53:48,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881220111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:48,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:48,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:48,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108620128] [2021-11-23 16:53:48,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:48,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:48,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:53:48,902 INFO L87 Difference]: Start difference. First operand 13825 states and 21655 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:49,792 INFO L93 Difference]: Finished difference Result 28683 states and 44823 transitions. [2021-11-23 16:53:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:53:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 16:53:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:49,830 INFO L225 Difference]: With dead ends: 28683 [2021-11-23 16:53:49,830 INFO L226 Difference]: Without dead ends: 14957 [2021-11-23 16:53:49,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:49,848 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 410 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:49,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 448 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:49,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14957 states. [2021-11-23 16:53:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14957 to 13946. [2021-11-23 16:53:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13946 states, 13945 states have (on average 1.561276443169595) internal successors, (21772), 13945 states have internal predecessors, (21772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13946 states to 13946 states and 21772 transitions. [2021-11-23 16:53:50,999 INFO L78 Accepts]: Start accepts. Automaton has 13946 states and 21772 transitions. Word has length 72 [2021-11-23 16:53:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:50,999 INFO L470 AbstractCegarLoop]: Abstraction has 13946 states and 21772 transitions. [2021-11-23 16:53:51,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 13946 states and 21772 transitions. [2021-11-23 16:53:51,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 16:53:51,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:51,005 INFO L514 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] [2021-11-23 16:53:51,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:51,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:51,217 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2071763586, now seen corresponding path program 1 times [2021-11-23 16:53:51,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:51,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433505553] [2021-11-23 16:53:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:51,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:51,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:51,219 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:51,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:53:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:51,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:53:51,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:51,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:51,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433505553] [2021-11-23 16:53:51,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433505553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:51,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:51,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:51,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015731276] [2021-11-23 16:53:51,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:51,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:51,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:51,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:51,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:53:51,424 INFO L87 Difference]: Start difference. First operand 13946 states and 21772 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:53,034 INFO L93 Difference]: Finished difference Result 36223 states and 56615 transitions. [2021-11-23 16:53:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:53:53,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-23 16:53:53,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:53,078 INFO L225 Difference]: With dead ends: 36223 [2021-11-23 16:53:53,078 INFO L226 Difference]: Without dead ends: 22425 [2021-11-23 16:53:53,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:53,105 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 519 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:53,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 406 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22425 states. [2021-11-23 16:53:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22425 to 22423. [2021-11-23 16:53:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22423 states, 22422 states have (on average 1.5457140308625457) internal successors, (34658), 22422 states have internal predecessors, (34658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22423 states to 22423 states and 34658 transitions. [2021-11-23 16:53:54,880 INFO L78 Accepts]: Start accepts. Automaton has 22423 states and 34658 transitions. Word has length 73 [2021-11-23 16:53:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:54,880 INFO L470 AbstractCegarLoop]: Abstraction has 22423 states and 34658 transitions. [2021-11-23 16:53:54,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 22423 states and 34658 transitions. [2021-11-23 16:53:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 16:53:54,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:54,888 INFO L514 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] [2021-11-23 16:53:54,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:55,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:55,102 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:55,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1386081746, now seen corresponding path program 1 times [2021-11-23 16:53:55,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:55,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382609465] [2021-11-23 16:53:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:55,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:55,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:55,105 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:55,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 16:53:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:55,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:53:55,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:55,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:55,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:55,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382609465] [2021-11-23 16:53:55,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382609465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:55,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:55,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:55,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432197096] [2021-11-23 16:53:55,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:55,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:53:55,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:53:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:53:55,323 INFO L87 Difference]: Start difference. First operand 22423 states and 34658 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:56,599 INFO L93 Difference]: Finished difference Result 36625 states and 56692 transitions. [2021-11-23 16:53:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:53:56,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-23 16:53:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:56,629 INFO L225 Difference]: With dead ends: 36625 [2021-11-23 16:53:56,629 INFO L226 Difference]: Without dead ends: 19056 [2021-11-23 16:53:56,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:56,644 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 47 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:56,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 634 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:53:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19056 states. [2021-11-23 16:53:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19056 to 19056. [2021-11-23 16:53:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19056 states, 19055 states have (on average 1.5415376541590133) internal successors, (29374), 19055 states have internal predecessors, (29374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19056 states to 19056 states and 29374 transitions. [2021-11-23 16:53:58,466 INFO L78 Accepts]: Start accepts. Automaton has 19056 states and 29374 transitions. Word has length 74 [2021-11-23 16:53:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:58,466 INFO L470 AbstractCegarLoop]: Abstraction has 19056 states and 29374 transitions. [2021-11-23 16:53:58,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19056 states and 29374 transitions. [2021-11-23 16:53:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 16:53:58,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:58,471 INFO L514 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] [2021-11-23 16:53:58,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:58,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:58,683 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash 16608702, now seen corresponding path program 1 times [2021-11-23 16:53:58,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:58,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963795162] [2021-11-23 16:53:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:58,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:58,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:58,685 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:58,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:53:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:58,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:58,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:58,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:58,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963795162] [2021-11-23 16:53:58,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963795162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:58,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:58,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:53:58,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664380102] [2021-11-23 16:53:58,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:58,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:58,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:58,884 INFO L87 Difference]: Start difference. First operand 19056 states and 29374 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:00,379 INFO L93 Difference]: Finished difference Result 35507 states and 55529 transitions. [2021-11-23 16:54:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:54:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 16:54:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:00,425 INFO L225 Difference]: With dead ends: 35507 [2021-11-23 16:54:00,426 INFO L226 Difference]: Without dead ends: 25743 [2021-11-23 16:54:00,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:00,439 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 106 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:00,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 442 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:54:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25743 states. [2021-11-23 16:54:02,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25743 to 25741. [2021-11-23 16:54:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25741 states, 25740 states have (on average 1.5491841491841492) internal successors, (39876), 25740 states have internal predecessors, (39876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25741 states to 25741 states and 39876 transitions. [2021-11-23 16:54:02,188 INFO L78 Accepts]: Start accepts. Automaton has 25741 states and 39876 transitions. Word has length 75 [2021-11-23 16:54:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:02,188 INFO L470 AbstractCegarLoop]: Abstraction has 25741 states and 39876 transitions. [2021-11-23 16:54:02,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 25741 states and 39876 transitions. [2021-11-23 16:54:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 16:54:02,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:02,192 INFO L514 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] [2021-11-23 16:54:02,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:02,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:02,403 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:02,404 INFO L85 PathProgramCache]: Analyzing trace with hash -397173006, now seen corresponding path program 1 times [2021-11-23 16:54:02,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:02,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44490825] [2021-11-23 16:54:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:02,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:02,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:02,405 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:02,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 16:54:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:02,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:54:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:02,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:02,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:02,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44490825] [2021-11-23 16:54:02,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44490825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:02,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:02,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:54:02,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672282411] [2021-11-23 16:54:02,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:02,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:54:02,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:02,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:54:02,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:54:02,620 INFO L87 Difference]: Start difference. First operand 25741 states and 39876 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:04,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:04,471 INFO L93 Difference]: Finished difference Result 36866 states and 57092 transitions. [2021-11-23 16:54:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:54:04,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 16:54:04,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:04,513 INFO L225 Difference]: With dead ends: 36866 [2021-11-23 16:54:04,513 INFO L226 Difference]: Without dead ends: 22296 [2021-11-23 16:54:04,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:54:04,531 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 23 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:04,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 614 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:54:04,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22296 states. [2021-11-23 16:54:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22296 to 22296. [2021-11-23 16:54:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22296 states, 22295 states have (on average 1.5454586230096434) internal successors, (34456), 22295 states have internal predecessors, (34456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22296 states to 22296 states and 34456 transitions. [2021-11-23 16:54:06,278 INFO L78 Accepts]: Start accepts. Automaton has 22296 states and 34456 transitions. Word has length 75 [2021-11-23 16:54:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:06,278 INFO L470 AbstractCegarLoop]: Abstraction has 22296 states and 34456 transitions. [2021-11-23 16:54:06,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 22296 states and 34456 transitions. [2021-11-23 16:54:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:54:06,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:06,282 INFO L514 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] [2021-11-23 16:54:06,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:06,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:06,493 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:06,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1822443776, now seen corresponding path program 1 times [2021-11-23 16:54:06,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:06,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429601910] [2021-11-23 16:54:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:06,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:06,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:06,495 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:06,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 16:54:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:06,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:54:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:06,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:06,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429601910] [2021-11-23 16:54:06,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429601910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:06,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:06,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:54:06,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726057418] [2021-11-23 16:54:06,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:54:06,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:54:06,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:54:06,923 INFO L87 Difference]: Start difference. First operand 22296 states and 34456 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:11,796 INFO L93 Difference]: Finished difference Result 92372 states and 144668 transitions. [2021-11-23 16:54:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:54:11,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 16:54:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:11,938 INFO L225 Difference]: With dead ends: 92372 [2021-11-23 16:54:11,939 INFO L226 Difference]: Without dead ends: 71112 [2021-11-23 16:54:11,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:54:11,965 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 526 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:11,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 714 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:54:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71112 states. [2021-11-23 16:54:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71112 to 57114. [2021-11-23 16:54:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57114 states, 57113 states have (on average 1.5407000157582338) internal successors, (87994), 57113 states have internal predecessors, (87994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57114 states to 57114 states and 87994 transitions. [2021-11-23 16:54:16,857 INFO L78 Accepts]: Start accepts. Automaton has 57114 states and 87994 transitions. Word has length 77 [2021-11-23 16:54:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:16,857 INFO L470 AbstractCegarLoop]: Abstraction has 57114 states and 87994 transitions. [2021-11-23 16:54:16,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 57114 states and 87994 transitions. [2021-11-23 16:54:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 16:54:16,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:16,861 INFO L514 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] [2021-11-23 16:54:16,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:17,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:17,072 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:17,073 INFO L85 PathProgramCache]: Analyzing trace with hash -723686396, now seen corresponding path program 1 times [2021-11-23 16:54:17,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:17,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361232039] [2021-11-23 16:54:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:17,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:17,074 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:17,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33224e21-befb-45d1-9689-e176c044aed8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:54:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:54:17,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:17,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:17,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:17,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361232039] [2021-11-23 16:54:17,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361232039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:17,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:17,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:54:17,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062566703] [2021-11-23 16:54:17,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:17,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:54:17,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:54:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:54:17,394 INFO L87 Difference]: Start difference. First operand 57114 states and 87994 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)