./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs --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 e33de91abae94de1988a656d08db3fbf5372a298 ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs --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 e33de91abae94de1988a656d08db3fbf5372a298 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:23:54,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:23:55,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:23:55,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:23:55,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:23:55,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:23:55,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:23:55,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:23:55,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:23:55,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:23:55,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:23:55,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:23:55,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:23:55,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:23:55,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:23:55,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:23:55,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:23:55,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:23:55,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:23:55,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:23:55,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:23:55,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:23:55,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:23:55,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:23:55,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:23:55,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:23:55,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:23:55,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:23:55,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:23:55,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:23:55,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:23:55,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:23:55,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:23:55,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:23:55,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:23:55,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:23:55,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:23:55,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:23:55,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:23:55,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:23:55,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:23:55,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:23:55,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:23:55,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:23:55,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:23:55,219 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:23:55,219 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:23:55,220 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:23:55,220 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:23:55,220 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:23:55,221 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:23:55,221 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:23:55,222 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:23:55,222 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:23:55,223 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:23:55,223 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:23:55,223 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:23:55,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:23:55,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:23:55,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:23:55,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:23:55,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:23:55,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:23:55,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:23:55,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:23:55,226 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:23:55,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:23:55,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:23:55,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:23:55,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:23:55,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:23:55,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:23:55,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:23:55,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:23:55,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:23:55,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:23:55,231 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:23:55,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:23:55,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:23:55,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:23:55,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:23:55,232 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_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e33de91abae94de1988a656d08db3fbf5372a298 [2021-10-16 02:23:55,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:23:55,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:23:55,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:23:55,632 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:23:55,633 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:23:55,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-10-16 02:23:55,721 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data/cce17aa6e/6338f61000f64f14b4b5b118c75e375d/FLAG4f460649f [2021-10-16 02:23:56,314 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:23:56,317 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-10-16 02:23:56,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data/cce17aa6e/6338f61000f64f14b4b5b118c75e375d/FLAG4f460649f [2021-10-16 02:23:56,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data/cce17aa6e/6338f61000f64f14b4b5b118c75e375d [2021-10-16 02:23:56,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:23:56,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:23:56,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:23:56,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:23:56,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:23:56,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:23:56" (1/1) ... [2021-10-16 02:23:56,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ff4991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:23:56, skipping insertion in model container [2021-10-16 02:23:56,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:23:56" (1/1) ... [2021-10-16 02:23:56,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:23:56,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:23:56,928 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-10-16 02:23:56,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:23:56,950 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-10-16 02:23:56,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16a5ddc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:23:56, skipping insertion in model container [2021-10-16 02:23:56,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:23:56,951 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-16 02:23:56,954 INFO L168 Benchmark]: Toolchain (without parser) took 298.32 ms. Allocated memory is still 102.8 MB. Free memory was 72.2 MB in the beginning and 79.5 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:23:56,955 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:23:56,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.71 ms. Allocated memory is still 102.8 MB. Free memory was 71.9 MB in the beginning and 79.5 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:23:56,958 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.71 ms. Allocated memory is still 102.8 MB. Free memory was 71.9 MB in the beginning and 79.5 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 104]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:23:59,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:23:59,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:23:59,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:23:59,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:23:59,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:23:59,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:23:59,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:23:59,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:23:59,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:23:59,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:23:59,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:23:59,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:23:59,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:23:59,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:23:59,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:23:59,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:23:59,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:23:59,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:23:59,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:23:59,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:23:59,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:23:59,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:23:59,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:23:59,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:23:59,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:23:59,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:23:59,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:23:59,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:23:59,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:23:59,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:23:59,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:23:59,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:23:59,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:23:59,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:23:59,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:23:59,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:23:59,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:23:59,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:23:59,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:23:59,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:23:59,557 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:23:59,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:23:59,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:23:59,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:23:59,586 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:23:59,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:23:59,586 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:23:59,586 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:23:59,587 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:23:59,587 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:23:59,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:23:59,588 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:23:59,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:23:59,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:23:59,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:23:59,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:23:59,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:23:59,590 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:23:59,590 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:23:59,590 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:23:59,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:23:59,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:23:59,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:23:59,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:23:59,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:23:59,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:23:59,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:23:59,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:23:59,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:23:59,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:23:59,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:23:59,593 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:23:59,594 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:23:59,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:23:59,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:23:59,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:23:59,595 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_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e33de91abae94de1988a656d08db3fbf5372a298 [2021-10-16 02:24:00,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:24:00,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:24:00,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:24:00,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:24:00,099 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:24:00,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-10-16 02:24:00,180 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data/e23293a15/ea8cc86b3f5347a18bcf624f2fa1b912/FLAG79f7046fa [2021-10-16 02:24:00,847 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:24:00,847 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2021-10-16 02:24:00,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data/e23293a15/ea8cc86b3f5347a18bcf624f2fa1b912/FLAG79f7046fa [2021-10-16 02:24:01,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/data/e23293a15/ea8cc86b3f5347a18bcf624f2fa1b912 [2021-10-16 02:24:01,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:24:01,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:24:01,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:24:01,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:24:01,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:24:01,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de164c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01, skipping insertion in model container [2021-10-16 02:24:01,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:24:01,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:24:01,424 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-10-16 02:24:01,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:24:01,451 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-16 02:24:01,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:24:01,474 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-10-16 02:24:01,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:24:01,503 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:24:01,551 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2021-10-16 02:24:01,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:24:01,577 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:24:01,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01 WrapperNode [2021-10-16 02:24:01,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:24:01,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:24:01,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:24:01,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:24:01,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:24:01,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:24:01,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:24:01,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:24:01,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:24:01,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:24:01,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:24:01,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:24:01,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (1/1) ... [2021-10-16 02:24:01,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:24:01,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:24:01,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:24:01,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:24:01,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:24:01,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:24:01,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:24:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-16 02:24:01,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-16 02:24:01,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-16 02:24:01,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-16 02:24:01,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-16 02:24:01,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-16 02:24:01,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-16 02:24:01,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-16 02:24:01,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:24:01,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:24:01,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:24:01,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:24:01,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:24:01,822 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-16 02:24:03,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:24:03,205 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2021-10-16 02:24:03,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:24:03 BoogieIcfgContainer [2021-10-16 02:24:03,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:24:03,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:24:03,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:24:03,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:24:03,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:24:01" (1/3) ... [2021-10-16 02:24:03,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8e82fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:24:03, skipping insertion in model container [2021-10-16 02:24:03,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:24:01" (2/3) ... [2021-10-16 02:24:03,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8e82fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:24:03, skipping insertion in model container [2021-10-16 02:24:03,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:24:03" (3/3) ... [2021-10-16 02:24:03,216 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2021-10-16 02:24:03,230 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-16 02:24:03,230 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:24:03,230 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:24:03,230 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-16 02:24:03,277 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,277 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,278 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,278 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,278 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,279 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,279 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,279 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,279 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,279 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,279 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,279 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,280 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,280 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,280 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,280 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,281 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,281 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,282 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,283 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,283 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,283 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,283 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,284 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,284 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,284 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,284 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,284 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,285 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,285 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,285 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,285 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,285 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,285 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,286 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,286 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,286 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,286 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,286 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,286 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,287 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,287 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,288 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,288 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,288 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,289 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,289 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,289 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,289 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,289 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,289 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,290 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,290 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,290 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,290 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,290 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,291 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,292 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,292 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,292 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,292 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,292 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,292 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,293 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,293 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,293 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,293 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,293 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,294 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,294 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,294 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,294 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,294 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,295 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,295 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,295 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,296 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,297 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,299 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,299 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,300 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,301 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,301 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,302 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,302 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,302 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,302 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,308 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,309 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,309 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,309 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,309 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,309 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,309 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,310 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,310 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,310 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,311 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,311 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,311 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,312 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,312 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,312 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,312 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,312 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,312 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,312 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,313 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,313 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,313 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,317 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,318 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,318 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,318 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,318 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,318 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,318 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,318 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,319 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,319 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,322 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,323 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,323 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,323 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,323 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,323 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,323 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,324 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,324 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,324 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,324 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,325 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,325 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,327 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,327 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,327 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,327 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,328 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,328 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,328 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,328 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,328 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,329 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,329 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,329 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,329 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,332 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,332 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,332 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,333 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,333 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,334 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,335 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,335 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,335 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,335 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,335 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,335 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,336 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:24:03,341 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-16 02:24:03,416 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:24:03,423 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, mConcurrency=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 [2021-10-16 02:24:03,423 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-16 02:24:03,440 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-16 02:24:03,450 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 136 transitions, 296 flow [2021-10-16 02:24:03,453 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 136 transitions, 296 flow [2021-10-16 02:24:03,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 136 transitions, 296 flow [2021-10-16 02:24:03,515 INFO L129 PetriNetUnfolder]: 12/133 cut-off events. [2021-10-16 02:24:03,515 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-16 02:24:03,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 133 events. 12/133 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 98. Up to 2 conditions per place. [2021-10-16 02:24:03,530 INFO L116 LiptonReduction]: Number of co-enabled transitions 1320 [2021-10-16 02:24:26,687 INFO L131 LiptonReduction]: Checked pairs total: 1652 [2021-10-16 02:24:26,687 INFO L133 LiptonReduction]: Total number of compositions: 129 [2021-10-16 02:24:26,700 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 28 transitions, 80 flow [2021-10-16 02:24:26,720 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:24:26,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:26,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:26,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash 92896510, now seen corresponding path program 1 times [2021-10-16 02:24:26,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:26,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285994586] [2021-10-16 02:24:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:26,762 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:26,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:26,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:26,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:24:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:26,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:24:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:27,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:27,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:27,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285994586] [2021-10-16 02:24:27,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285994586] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:24:27,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:24:27,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-16 02:24:27,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88382538] [2021-10-16 02:24:27,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:24:27,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:24:27,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:24:27,506 INFO L87 Difference]: Start difference. First operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:27,617 INFO L93 Difference]: Finished difference Result 204 states and 632 transitions. [2021-10-16 02:24:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:24:27,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 20 [2021-10-16 02:24:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:27,643 INFO L225 Difference]: With dead ends: 204 [2021-10-16 02:24:27,643 INFO L226 Difference]: Without dead ends: 197 [2021-10-16 02:24:27,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:24:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-16 02:24:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-10-16 02:24:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 3.13265306122449) internal successors, (614), 196 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 614 transitions. [2021-10-16 02:24:27,737 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 614 transitions. Word has length 20 [2021-10-16 02:24:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:27,738 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 614 transitions. [2021-10-16 02:24:27,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 614 transitions. [2021-10-16 02:24:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:24:27,742 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:27,743 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:27,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:27,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:27,946 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:27,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:27,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2079561210, now seen corresponding path program 1 times [2021-10-16 02:24:27,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:27,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824098175] [2021-10-16 02:24:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:27,948 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:27,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:27,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:27,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:24:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:24:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:28,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:28,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:28,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824098175] [2021-10-16 02:24:28,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824098175] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:24:28,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:24:28,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-16 02:24:28,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105925080] [2021-10-16 02:24:28,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:24:28,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:28,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:24:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:24:28,567 INFO L87 Difference]: Start difference. First operand 197 states and 614 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:28,787 INFO L93 Difference]: Finished difference Result 379 states and 1141 transitions. [2021-10-16 02:24:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:24:28,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-16 02:24:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:28,794 INFO L225 Difference]: With dead ends: 379 [2021-10-16 02:24:28,795 INFO L226 Difference]: Without dead ends: 375 [2021-10-16 02:24:28,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:24:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-10-16 02:24:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 287. [2021-10-16 02:24:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.1783216783216783) internal successors, (909), 286 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 909 transitions. [2021-10-16 02:24:28,828 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 909 transitions. Word has length 21 [2021-10-16 02:24:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:28,828 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 909 transitions. [2021-10-16 02:24:28,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 909 transitions. [2021-10-16 02:24:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:24:28,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:28,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:28,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:29,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:29,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:29,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:29,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1971778909, now seen corresponding path program 1 times [2021-10-16 02:24:29,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:29,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988700612] [2021-10-16 02:24:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:29,048 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:29,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:29,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:29,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:24:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:29,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:24:29,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:29,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:29,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:29,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988700612] [2021-10-16 02:24:29,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988700612] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:24:29,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:24:29,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 10 [2021-10-16 02:24:29,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212469657] [2021-10-16 02:24:29,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:24:29,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:24:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:24:29,712 INFO L87 Difference]: Start difference. First operand 287 states and 909 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:30,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:30,621 INFO L93 Difference]: Finished difference Result 447 states and 1290 transitions. [2021-10-16 02:24:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:24:30,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 21 [2021-10-16 02:24:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:30,628 INFO L225 Difference]: With dead ends: 447 [2021-10-16 02:24:30,628 INFO L226 Difference]: Without dead ends: 407 [2021-10-16 02:24:30,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:24:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-10-16 02:24:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 299. [2021-10-16 02:24:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0805369127516777) internal successors, (918), 298 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 918 transitions. [2021-10-16 02:24:30,655 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 918 transitions. Word has length 21 [2021-10-16 02:24:30,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:30,655 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 918 transitions. [2021-10-16 02:24:30,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 918 transitions. [2021-10-16 02:24:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:24:30,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:30,660 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:30,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:30,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:30,874 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2113150932, now seen corresponding path program 1 times [2021-10-16 02:24:30,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:30,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348166635] [2021-10-16 02:24:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:30,875 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:30,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:30,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:30,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:24:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:31,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:24:31,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:31,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:31,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:31,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348166635] [2021-10-16 02:24:31,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348166635] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:24:31,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:24:31,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:24:31,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320755215] [2021-10-16 02:24:31,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:24:31,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:24:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:24:31,520 INFO L87 Difference]: Start difference. First operand 299 states and 918 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:32,144 INFO L93 Difference]: Finished difference Result 387 states and 1139 transitions. [2021-10-16 02:24:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:24:32,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 21 [2021-10-16 02:24:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:32,151 INFO L225 Difference]: With dead ends: 387 [2021-10-16 02:24:32,151 INFO L226 Difference]: Without dead ends: 357 [2021-10-16 02:24:32,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:24:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-16 02:24:32,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 307. [2021-10-16 02:24:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.052287581699346) internal successors, (934), 306 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:32,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 934 transitions. [2021-10-16 02:24:32,176 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 934 transitions. Word has length 21 [2021-10-16 02:24:32,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:32,177 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 934 transitions. [2021-10-16 02:24:32,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 934 transitions. [2021-10-16 02:24:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:24:32,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:32,189 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:32,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:32,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:32,403 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash -728276090, now seen corresponding path program 2 times [2021-10-16 02:24:32,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:32,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697638641] [2021-10-16 02:24:32,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:24:32,405 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:32,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:32,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:32,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:24:32,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:32,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:32,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:24:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:32,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:33,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:33,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697638641] [2021-10-16 02:24:33,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697638641] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:24:33,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:24:33,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 10 [2021-10-16 02:24:33,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398130704] [2021-10-16 02:24:33,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:24:33,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:33,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:24:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:24:33,257 INFO L87 Difference]: Start difference. First operand 307 states and 934 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:34,082 INFO L93 Difference]: Finished difference Result 619 states and 1705 transitions. [2021-10-16 02:24:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:24:34,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2021-10-16 02:24:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:34,089 INFO L225 Difference]: With dead ends: 619 [2021-10-16 02:24:34,090 INFO L226 Difference]: Without dead ends: 587 [2021-10-16 02:24:34,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 457.3ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:24:34,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-10-16 02:24:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 323. [2021-10-16 02:24:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.170807453416149) internal successors, (1021), 322 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1021 transitions. [2021-10-16 02:24:34,114 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1021 transitions. Word has length 21 [2021-10-16 02:24:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:34,115 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 1021 transitions. [2021-10-16 02:24:34,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1021 transitions. [2021-10-16 02:24:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:24:34,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:34,118 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:34,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:34,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:34,326 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:34,327 INFO L82 PathProgramCache]: Analyzing trace with hash 491173578, now seen corresponding path program 3 times [2021-10-16 02:24:34,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:34,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538528977] [2021-10-16 02:24:34,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:24:34,328 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:34,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:34,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:24:34,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:24:34,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:24:34,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:35,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:35,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538528977] [2021-10-16 02:24:35,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538528977] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:24:35,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:24:35,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-10-16 02:24:35,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934201339] [2021-10-16 02:24:35,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:24:35,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:24:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:24:35,118 INFO L87 Difference]: Start difference. First operand 323 states and 1021 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:35,553 INFO L93 Difference]: Finished difference Result 471 states and 1427 transitions. [2021-10-16 02:24:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:24:35,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-16 02:24:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:35,560 INFO L225 Difference]: With dead ends: 471 [2021-10-16 02:24:35,561 INFO L226 Difference]: Without dead ends: 455 [2021-10-16 02:24:35,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:24:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-10-16 02:24:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 315. [2021-10-16 02:24:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0636942675159236) internal successors, (962), 314 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 962 transitions. [2021-10-16 02:24:35,583 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 962 transitions. Word has length 21 [2021-10-16 02:24:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:35,583 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 962 transitions. [2021-10-16 02:24:35,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 962 transitions. [2021-10-16 02:24:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:24:35,586 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:35,586 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:35,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:35,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:35,801 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:35,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1568001428, now seen corresponding path program 4 times [2021-10-16 02:24:35,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:35,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072299766] [2021-10-16 02:24:35,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:24:35,802 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:35,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:35,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:35,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:24:36,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:24:36,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:36,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:24:36,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:36,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:36,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:36,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072299766] [2021-10-16 02:24:36,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072299766] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:24:36,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:24:36,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:24:36,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663899159] [2021-10-16 02:24:36,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:24:36,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:24:36,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:24:36,551 INFO L87 Difference]: Start difference. First operand 315 states and 962 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:37,124 INFO L93 Difference]: Finished difference Result 477 states and 1447 transitions. [2021-10-16 02:24:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:24:37,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 21 [2021-10-16 02:24:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:37,131 INFO L225 Difference]: With dead ends: 477 [2021-10-16 02:24:37,131 INFO L226 Difference]: Without dead ends: 455 [2021-10-16 02:24:37,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:24:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-10-16 02:24:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 327. [2021-10-16 02:24:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.1134969325153374) internal successors, (1015), 326 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 1015 transitions. [2021-10-16 02:24:37,149 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 1015 transitions. Word has length 21 [2021-10-16 02:24:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:37,150 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 1015 transitions. [2021-10-16 02:24:37,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 1015 transitions. [2021-10-16 02:24:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:24:37,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:37,152 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:37,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:37,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:37,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash 780865942, now seen corresponding path program 5 times [2021-10-16 02:24:37,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:37,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393292679] [2021-10-16 02:24:37,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:24:37,369 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:37,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:37,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:37,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:24:37,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:37,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:37,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:24:37,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:37,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:38,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:38,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393292679] [2021-10-16 02:24:38,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393292679] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:38,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [465897033] [2021-10-16 02:24:38,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:24:38,151 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:38,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:24:38,153 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:24:38,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:24:38,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:38,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:38,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:24:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:38,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:39,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [465897033] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:39,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754790639] [2021-10-16 02:24:39,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:24:39,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:24:39,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:24:39,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:24:39,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:24:39,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:39,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:24:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:39,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:39,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754790639] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:39,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:24:39,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 20 [2021-10-16 02:24:39,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351920964] [2021-10-16 02:24:39,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:24:39,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:39,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:24:39,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:24:39,754 INFO L87 Difference]: Start difference. First operand 327 states and 1015 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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) [2021-10-16 02:24:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:40,376 INFO L93 Difference]: Finished difference Result 561 states and 1699 transitions. [2021-10-16 02:24:40,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:24:40,379 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 21 [2021-10-16 02:24:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:40,384 INFO L225 Difference]: With dead ends: 561 [2021-10-16 02:24:40,384 INFO L226 Difference]: Without dead ends: 478 [2021-10-16 02:24:40,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:24:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-10-16 02:24:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 262. [2021-10-16 02:24:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.2298850574712645) internal successors, (843), 261 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 843 transitions. [2021-10-16 02:24:40,411 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 843 transitions. Word has length 21 [2021-10-16 02:24:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:40,413 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 843 transitions. [2021-10-16 02:24:40,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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) [2021-10-16 02:24:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 843 transitions. [2021-10-16 02:24:40,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:24:40,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:40,417 INFO L512 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] [2021-10-16 02:24:40,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-10-16 02:24:40,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:40,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:41,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:41,021 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash 222500957, now seen corresponding path program 1 times [2021-10-16 02:24:41,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:41,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781213020] [2021-10-16 02:24:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:41,022 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:41,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:41,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:41,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:24:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:41,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:24:41,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:41,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:42,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:42,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781213020] [2021-10-16 02:24:42,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781213020] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:42,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [125573921] [2021-10-16 02:24:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:42,256 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:42,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:24:42,258 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:24:42,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:24:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:24:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:43,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:43,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [125573921] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:43,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409063692] [2021-10-16 02:24:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:43,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:24:43,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:24:43,226 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:24:43,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:24:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:24:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:44,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:44,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409063692] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:24:44,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:24:44,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8, 7, 7, 8] total 28 [2021-10-16 02:24:44,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047268023] [2021-10-16 02:24:44,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:24:44,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:44,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:24:44,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-10-16 02:24:44,234 INFO L87 Difference]: Start difference. First operand 262 states and 843 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:44,784 INFO L93 Difference]: Finished difference Result 360 states and 1123 transitions. [2021-10-16 02:24:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:24:44,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:24:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:44,789 INFO L225 Difference]: With dead ends: 360 [2021-10-16 02:24:44,790 INFO L226 Difference]: Without dead ends: 360 [2021-10-16 02:24:44,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 869.0ms TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-10-16 02:24:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-16 02:24:44,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-10-16 02:24:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.3018181818181818) internal successors, (908), 275 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 908 transitions. [2021-10-16 02:24:44,807 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 908 transitions. Word has length 22 [2021-10-16 02:24:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:44,808 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 908 transitions. [2021-10-16 02:24:44,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 908 transitions. [2021-10-16 02:24:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:24:44,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:44,810 INFO L512 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] [2021-10-16 02:24:44,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:45,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:45,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:45,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:45,427 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:45,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:45,427 INFO L82 PathProgramCache]: Analyzing trace with hash 663686447, now seen corresponding path program 2 times [2021-10-16 02:24:45,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:45,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470376421] [2021-10-16 02:24:45,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:24:45,428 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:45,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:45,429 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:45,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:24:45,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:45,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:45,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:24:45,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:46,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:46,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:46,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470376421] [2021-10-16 02:24:46,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470376421] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:46,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2039415640] [2021-10-16 02:24:46,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:24:46,473 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:46,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:24:46,474 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:24:46,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:24:47,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:47,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:47,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:24:47,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:47,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:47,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2039415640] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:24:47,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:24:47,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 19 [2021-10-16 02:24:47,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795057627] [2021-10-16 02:24:47,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:24:47,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:24:47,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:24:47,635 INFO L87 Difference]: Start difference. First operand 276 states and 908 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:47,997 INFO L93 Difference]: Finished difference Result 432 states and 1370 transitions. [2021-10-16 02:24:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:24:47,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:24:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:48,001 INFO L225 Difference]: With dead ends: 432 [2021-10-16 02:24:48,003 INFO L226 Difference]: Without dead ends: 432 [2021-10-16 02:24:48,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:24:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-10-16 02:24:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 298. [2021-10-16 02:24:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.393939393939394) internal successors, (1008), 297 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 1008 transitions. [2021-10-16 02:24:48,024 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 1008 transitions. Word has length 22 [2021-10-16 02:24:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:48,025 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 1008 transitions. [2021-10-16 02:24:48,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 1008 transitions. [2021-10-16 02:24:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:24:48,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:48,028 INFO L512 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] [2021-10-16 02:24:48,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:48,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:48,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:48,446 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:48,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1508884119, now seen corresponding path program 3 times [2021-10-16 02:24:48,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:48,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092448175] [2021-10-16 02:24:48,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:24:48,446 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:48,448 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:48,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:24:48,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:24:48,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:48,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:24:48,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:49,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:49,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:49,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092448175] [2021-10-16 02:24:49,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092448175] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:49,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1856819253] [2021-10-16 02:24:49,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:24:49,639 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:49,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:24:49,642 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:24:49,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-16 02:24:50,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:24:50,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:50,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:24:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:50,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:50,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1856819253] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:24:50,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:24:50,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 18 [2021-10-16 02:24:50,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98898937] [2021-10-16 02:24:50,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:24:50,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:50,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:24:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:24:50,763 INFO L87 Difference]: Start difference. First operand 298 states and 1008 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:51,030 INFO L93 Difference]: Finished difference Result 366 states and 1206 transitions. [2021-10-16 02:24:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:24:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:24:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:51,035 INFO L225 Difference]: With dead ends: 366 [2021-10-16 02:24:51,035 INFO L226 Difference]: Without dead ends: 366 [2021-10-16 02:24:51,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:24:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-10-16 02:24:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2021-10-16 02:24:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.372937293729373) internal successors, (1022), 303 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1022 transitions. [2021-10-16 02:24:51,051 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1022 transitions. Word has length 22 [2021-10-16 02:24:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:51,051 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1022 transitions. [2021-10-16 02:24:51,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1022 transitions. [2021-10-16 02:24:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:24:51,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:51,053 INFO L512 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] [2021-10-16 02:24:51,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:51,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:51,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:51,468 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1024743413, now seen corresponding path program 4 times [2021-10-16 02:24:51,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:51,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825094769] [2021-10-16 02:24:51,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:24:51,470 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:51,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:51,471 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:51,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:24:51,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:24:51,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:51,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:24:51,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:52,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:52,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:52,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825094769] [2021-10-16 02:24:52,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825094769] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:52,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1026512952] [2021-10-16 02:24:52,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:24:52,780 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:52,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:24:52,786 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:24:52,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-16 02:24:53,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:24:53,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:53,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:24:53,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:53,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:54,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1026512952] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:54,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510938995] [2021-10-16 02:24:54,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:24:54,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:24:54,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:24:54,052 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:24:54,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-16 02:24:54,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:24:54,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:54,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:24:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:54,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:55,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510938995] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:24:55,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:24:55,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8, 7, 7, 8] total 29 [2021-10-16 02:24:55,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632582012] [2021-10-16 02:24:55,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:24:55,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:55,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:24:55,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-10-16 02:24:55,140 INFO L87 Difference]: Start difference. First operand 304 states and 1022 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:55,560 INFO L93 Difference]: Finished difference Result 416 states and 1349 transitions. [2021-10-16 02:24:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:24:55,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:24:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:55,575 INFO L225 Difference]: With dead ends: 416 [2021-10-16 02:24:55,576 INFO L226 Difference]: Without dead ends: 416 [2021-10-16 02:24:55,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 819.6ms TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2021-10-16 02:24:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-10-16 02:24:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 326. [2021-10-16 02:24:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.353846153846154) internal successors, (1090), 325 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1090 transitions. [2021-10-16 02:24:55,594 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1090 transitions. Word has length 22 [2021-10-16 02:24:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:55,594 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1090 transitions. [2021-10-16 02:24:55,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1090 transitions. [2021-10-16 02:24:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:24:55,597 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:55,597 INFO L512 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] [2021-10-16 02:24:55,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:55,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:56,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:56,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:56,213 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:24:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash 704303921, now seen corresponding path program 5 times [2021-10-16 02:24:56,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:56,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581377173] [2021-10-16 02:24:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:24:56,214 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:56,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:56,215 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:56,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 02:24:56,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:56,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:56,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:24:56,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:57,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:57,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:57,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581377173] [2021-10-16 02:24:57,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581377173] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:57,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1852389422] [2021-10-16 02:24:57,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:24:57,444 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:57,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:24:57,455 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:24:57,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-16 02:24:58,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:58,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:58,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:24:58,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:58,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:58,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1852389422] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:58,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701912999] [2021-10-16 02:24:58,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:24:58,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:24:58,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:24:58,810 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:24:58,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-16 02:24:59,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:59,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:59,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:24:59,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:59,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:24:59,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701912999] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:24:59,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:24:59,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 8] total 28 [2021-10-16 02:24:59,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213974180] [2021-10-16 02:24:59,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:24:59,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:24:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-10-16 02:24:59,975 INFO L87 Difference]: Start difference. First operand 326 states and 1090 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:00,526 INFO L93 Difference]: Finished difference Result 446 states and 1431 transitions. [2021-10-16 02:25:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:25:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:00,540 INFO L225 Difference]: With dead ends: 446 [2021-10-16 02:25:00,540 INFO L226 Difference]: Without dead ends: 446 [2021-10-16 02:25:00,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 794.0ms TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-10-16 02:25:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-10-16 02:25:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 332. [2021-10-16 02:25:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.389728096676737) internal successors, (1122), 331 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1122 transitions. [2021-10-16 02:25:00,559 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1122 transitions. Word has length 22 [2021-10-16 02:25:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:00,560 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1122 transitions. [2021-10-16 02:25:00,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1122 transitions. [2021-10-16 02:25:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:00,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:00,572 INFO L512 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] [2021-10-16 02:25:00,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:00,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:01,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:01,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:01,202 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:01,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1145489411, now seen corresponding path program 6 times [2021-10-16 02:25:01,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:01,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676298461] [2021-10-16 02:25:01,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:25:01,203 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:01,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:01,205 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:01,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-16 02:25:02,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:25:02,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:25:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:02,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:02,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:02,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676298461] [2021-10-16 02:25:02,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676298461] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:02,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640616357] [2021-10-16 02:25:02,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:25:02,837 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:02,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:02,862 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:02,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-10-16 02:25:03,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:25:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:03,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:25:03,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:04,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:04,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640616357] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:25:04,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:25:04,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-16 02:25:04,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447007641] [2021-10-16 02:25:04,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:25:04,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:25:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:25:04,262 INFO L87 Difference]: Start difference. First operand 332 states and 1122 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:04,592 INFO L93 Difference]: Finished difference Result 450 states and 1455 transitions. [2021-10-16 02:25:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:25:04,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:04,596 INFO L225 Difference]: With dead ends: 450 [2021-10-16 02:25:04,597 INFO L226 Difference]: Without dead ends: 450 [2021-10-16 02:25:04,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 561.3ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:25:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-10-16 02:25:04,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 328. [2021-10-16 02:25:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.3211009174311927) internal successors, (1086), 327 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1086 transitions. [2021-10-16 02:25:04,612 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1086 transitions. Word has length 22 [2021-10-16 02:25:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:04,612 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1086 transitions. [2021-10-16 02:25:04,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1086 transitions. [2021-10-16 02:25:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:04,614 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:04,614 INFO L512 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] [2021-10-16 02:25:04,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-16 02:25:04,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-10-16 02:25:05,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:05,028 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash -104777222, now seen corresponding path program 1 times [2021-10-16 02:25:05,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:05,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189028937] [2021-10-16 02:25:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:05,029 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:05,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:05,031 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:05,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-16 02:25:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:05,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:25:05,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:05,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:06,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:06,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189028937] [2021-10-16 02:25:06,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189028937] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:06,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568838544] [2021-10-16 02:25:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:06,018 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:06,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:06,026 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:06,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-16 02:25:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:06,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:25:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:07,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:07,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568838544] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:07,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462152541] [2021-10-16 02:25:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:07,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:07,269 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:07,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-16 02:25:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:08,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:25:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:08,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:08,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462152541] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:08,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:25:08,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5, 5, 5] total 19 [2021-10-16 02:25:08,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537715906] [2021-10-16 02:25:08,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:25:08,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:08,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:25:08,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:25:08,459 INFO L87 Difference]: Start difference. First operand 328 states and 1086 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:08,985 INFO L93 Difference]: Finished difference Result 572 states and 1751 transitions. [2021-10-16 02:25:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:25:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:08,990 INFO L225 Difference]: With dead ends: 572 [2021-10-16 02:25:08,990 INFO L226 Difference]: Without dead ends: 572 [2021-10-16 02:25:08,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:25:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-10-16 02:25:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 340. [2021-10-16 02:25:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.3805309734513274) internal successors, (1146), 339 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1146 transitions. [2021-10-16 02:25:09,009 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1146 transitions. Word has length 22 [2021-10-16 02:25:09,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:09,010 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1146 transitions. [2021-10-16 02:25:09,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1146 transitions. [2021-10-16 02:25:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:09,012 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:09,012 INFO L512 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] [2021-10-16 02:25:09,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:09,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-16 02:25:09,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:09,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:09,638 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:09,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2069005467, now seen corresponding path program 7 times [2021-10-16 02:25:09,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:09,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232545835] [2021-10-16 02:25:09,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:25:09,639 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:09,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:09,640 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:09,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-16 02:25:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:25:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:10,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:10,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:10,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232545835] [2021-10-16 02:25:10,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232545835] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:10,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1481145164] [2021-10-16 02:25:10,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:25:10,982 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:10,983 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:10,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-16 02:25:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:25:11,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:12,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:12,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1481145164] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:12,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270982676] [2021-10-16 02:25:12,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:25:12,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:12,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:12,511 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:12,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-16 02:25:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:13,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:25:13,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:13,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:13,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270982676] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:25:13,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:25:13,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 27 [2021-10-16 02:25:13,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027559234] [2021-10-16 02:25:13,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:25:13,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:13,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:25:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2021-10-16 02:25:13,943 INFO L87 Difference]: Start difference. First operand 340 states and 1146 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:14,523 INFO L93 Difference]: Finished difference Result 564 states and 1855 transitions. [2021-10-16 02:25:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:25:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:14,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:14,530 INFO L225 Difference]: With dead ends: 564 [2021-10-16 02:25:14,530 INFO L226 Difference]: Without dead ends: 564 [2021-10-16 02:25:14,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 775.9ms TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2021-10-16 02:25:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-10-16 02:25:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 340. [2021-10-16 02:25:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.3805309734513274) internal successors, (1146), 339 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1146 transitions. [2021-10-16 02:25:14,548 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1146 transitions. Word has length 22 [2021-10-16 02:25:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:14,549 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1146 transitions. [2021-10-16 02:25:14,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1146 transitions. [2021-10-16 02:25:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:14,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:14,551 INFO L512 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] [2021-10-16 02:25:14,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-16 02:25:14,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-10-16 02:25:14,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-16 02:25:15,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:15,167 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash -695241353, now seen corresponding path program 8 times [2021-10-16 02:25:15,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:15,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638512576] [2021-10-16 02:25:15,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:25:15,168 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:15,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:15,169 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:15,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-16 02:25:15,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:25:15,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:15,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:25:15,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:16,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:16,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:16,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638512576] [2021-10-16 02:25:16,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638512576] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:16,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [29355784] [2021-10-16 02:25:16,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:25:16,874 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:16,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:16,874 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:16,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-10-16 02:25:18,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:25:18,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:18,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:25:18,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:18,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:18,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [29355784] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:25:18,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:25:18,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 8, 6] total 25 [2021-10-16 02:25:18,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89525864] [2021-10-16 02:25:18,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:25:18,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:25:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-10-16 02:25:18,625 INFO L87 Difference]: Start difference. First operand 340 states and 1146 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:18,892 INFO L93 Difference]: Finished difference Result 442 states and 1490 transitions. [2021-10-16 02:25:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:25:18,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:18,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:18,897 INFO L225 Difference]: With dead ends: 442 [2021-10-16 02:25:18,897 INFO L226 Difference]: Without dead ends: 442 [2021-10-16 02:25:18,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 759.2ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-10-16 02:25:18,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-16 02:25:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 344. [2021-10-16 02:25:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.4081632653061225) internal successors, (1169), 343 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1169 transitions. [2021-10-16 02:25:18,911 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1169 transitions. Word has length 22 [2021-10-16 02:25:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:18,911 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1169 transitions. [2021-10-16 02:25:18,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1169 transitions. [2021-10-16 02:25:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:18,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:18,913 INFO L512 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] [2021-10-16 02:25:18,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:19,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-10-16 02:25:19,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:19,327 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:19,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1502006858, now seen corresponding path program 2 times [2021-10-16 02:25:19,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:19,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431064372] [2021-10-16 02:25:19,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:25:19,328 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:19,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:19,329 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:19,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-16 02:25:20,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:25:20,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:20,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:25:20,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:20,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:20,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:20,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431064372] [2021-10-16 02:25:20,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431064372] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:20,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [169380881] [2021-10-16 02:25:20,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:25:20,532 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:20,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:20,533 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:20,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-16 02:25:21,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:25:21,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:21,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:25:21,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:21,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:22,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [169380881] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:25:22,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:25:22,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 4] total 12 [2021-10-16 02:25:22,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034023213] [2021-10-16 02:25:22,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:25:22,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:25:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:25:22,054 INFO L87 Difference]: Start difference. First operand 344 states and 1169 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:22,186 INFO L93 Difference]: Finished difference Result 292 states and 992 transitions. [2021-10-16 02:25:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:25:22,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:22,190 INFO L225 Difference]: With dead ends: 292 [2021-10-16 02:25:22,190 INFO L226 Difference]: Without dead ends: 292 [2021-10-16 02:25:22,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:25:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-16 02:25:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 236. [2021-10-16 02:25:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.3404255319148937) internal successors, (785), 235 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 785 transitions. [2021-10-16 02:25:22,209 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 785 transitions. Word has length 22 [2021-10-16 02:25:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:22,209 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 785 transitions. [2021-10-16 02:25:22,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 785 transitions. [2021-10-16 02:25:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:22,211 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:22,211 INFO L512 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] [2021-10-16 02:25:22,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:22,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-10-16 02:25:22,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:22,618 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:22,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1873326669, now seen corresponding path program 9 times [2021-10-16 02:25:22,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:22,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439243986] [2021-10-16 02:25:22,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:25:22,619 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:22,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:22,619 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:22,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-16 02:25:23,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:25:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:23,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:25:23,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:23,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:24,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:24,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439243986] [2021-10-16 02:25:24,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439243986] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:24,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [637358245] [2021-10-16 02:25:24,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:25:24,201 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:24,202 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:24,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-10-16 02:25:25,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-16 02:25:25,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:25,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:25:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:25,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:25,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [637358245] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:25:25,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:25:25,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2021-10-16 02:25:25,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263091354] [2021-10-16 02:25:25,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:25:25,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:25:25,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:25:25,953 INFO L87 Difference]: Start difference. First operand 236 states and 785 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:26,292 INFO L93 Difference]: Finished difference Result 322 states and 1021 transitions. [2021-10-16 02:25:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:25:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:26,296 INFO L225 Difference]: With dead ends: 322 [2021-10-16 02:25:26,297 INFO L226 Difference]: Without dead ends: 322 [2021-10-16 02:25:26,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:25:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-16 02:25:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 244. [2021-10-16 02:25:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.3045267489711936) internal successors, (803), 243 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 803 transitions. [2021-10-16 02:25:26,308 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 803 transitions. Word has length 22 [2021-10-16 02:25:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 803 transitions. [2021-10-16 02:25:26,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 803 transitions. [2021-10-16 02:25:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:26,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:26,310 INFO L512 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] [2021-10-16 02:25:26,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:26,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:26,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:26,716 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:26,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash 390191731, now seen corresponding path program 10 times [2021-10-16 02:25:26,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:26,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904717484] [2021-10-16 02:25:26,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:25:26,717 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:26,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:26,722 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:26,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-16 02:25:27,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:25:27,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:25:27,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:27,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:28,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:28,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904717484] [2021-10-16 02:25:28,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904717484] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:28,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989786977] [2021-10-16 02:25:28,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:25:28,269 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:28,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:28,270 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:28,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-10-16 02:25:29,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:25:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:25:29,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:29,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:30,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [989786977] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:30,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838853257] [2021-10-16 02:25:30,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:25:30,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:30,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:30,055 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:30,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-16 02:25:31,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:25:31,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:31,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:25:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:31,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:31,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838853257] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:25:31,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:25:31,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 32 [2021-10-16 02:25:31,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157684044] [2021-10-16 02:25:31,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:25:31,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:31,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:25:31,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-10-16 02:25:31,860 INFO L87 Difference]: Start difference. First operand 244 states and 803 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:32,511 INFO L93 Difference]: Finished difference Result 548 states and 1665 transitions. [2021-10-16 02:25:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:25:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:32,519 INFO L225 Difference]: With dead ends: 548 [2021-10-16 02:25:32,519 INFO L226 Difference]: Without dead ends: 548 [2021-10-16 02:25:32,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 983.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1033, Unknown=0, NotChecked=0, Total=1332 [2021-10-16 02:25:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-10-16 02:25:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 260. [2021-10-16 02:25:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.4015444015444016) internal successors, (881), 259 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 881 transitions. [2021-10-16 02:25:32,531 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 881 transitions. Word has length 22 [2021-10-16 02:25:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:32,532 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 881 transitions. [2021-10-16 02:25:32,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 881 transitions. [2021-10-16 02:25:32,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:32,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:32,534 INFO L512 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] [2021-10-16 02:25:32,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-10-16 02:25:32,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-16 02:25:32,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-10-16 02:25:33,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:33,138 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:33,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1251192067, now seen corresponding path program 11 times [2021-10-16 02:25:33,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:33,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062350179] [2021-10-16 02:25:33,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-16 02:25:33,139 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:33,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:33,140 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:33,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-16 02:25:34,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:25:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:34,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:25:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:34,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:34,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:34,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062350179] [2021-10-16 02:25:34,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062350179] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:25:34,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:25:34,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-16 02:25:34,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781586514] [2021-10-16 02:25:34,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:25:34,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:34,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:25:34,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:25:34,844 INFO L87 Difference]: Start difference. First operand 260 states and 881 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:35,196 INFO L93 Difference]: Finished difference Result 284 states and 950 transitions. [2021-10-16 02:25:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:25:35,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:35,198 INFO L225 Difference]: With dead ends: 284 [2021-10-16 02:25:35,199 INFO L226 Difference]: Without dead ends: 282 [2021-10-16 02:25:35,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:25:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-10-16 02:25:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 258. [2021-10-16 02:25:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.4007782101167314) internal successors, (874), 257 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 874 transitions. [2021-10-16 02:25:35,213 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 874 transitions. Word has length 22 [2021-10-16 02:25:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:35,214 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 874 transitions. [2021-10-16 02:25:35,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 874 transitions. [2021-10-16 02:25:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:35,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:35,216 INFO L512 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] [2021-10-16 02:25:35,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:35,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:35,431 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2009010017, now seen corresponding path program 12 times [2021-10-16 02:25:35,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:35,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418349904] [2021-10-16 02:25:35,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:25:35,432 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:35,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:35,433 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:35,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-16 02:25:36,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:25:36,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:36,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:25:36,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:36,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:37,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:37,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418349904] [2021-10-16 02:25:37,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418349904] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:37,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1276846086] [2021-10-16 02:25:37,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:25:37,126 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:37,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:37,127 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:37,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-10-16 02:25:38,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:25:38,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:38,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:25:38,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:38,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:39,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1276846086] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:39,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236015919] [2021-10-16 02:25:39,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-16 02:25:39,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:39,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:39,065 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:39,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-16 02:25:40,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-16 02:25:40,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:40,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:25:40,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:40,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:41,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236015919] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:25:41,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 02:25:41,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7, 7, 9] total 22 [2021-10-16 02:25:41,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191178604] [2021-10-16 02:25:41,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:25:41,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:25:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:25:41,022 INFO L87 Difference]: Start difference. First operand 258 states and 874 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:41,697 INFO L93 Difference]: Finished difference Result 492 states and 1540 transitions. [2021-10-16 02:25:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:25:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:41,701 INFO L225 Difference]: With dead ends: 492 [2021-10-16 02:25:41,701 INFO L226 Difference]: Without dead ends: 492 [2021-10-16 02:25:41,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 676.4ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:25:41,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-10-16 02:25:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 256. [2021-10-16 02:25:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.384313725490196) internal successors, (863), 255 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 863 transitions. [2021-10-16 02:25:41,716 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 863 transitions. Word has length 22 [2021-10-16 02:25:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:41,716 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 863 transitions. [2021-10-16 02:25:41,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 863 transitions. [2021-10-16 02:25:41,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:25:41,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:41,718 INFO L512 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] [2021-10-16 02:25:41,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:41,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-16 02:25:42,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-10-16 02:25:42,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:42,334 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:42,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2135904269, now seen corresponding path program 13 times [2021-10-16 02:25:42,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:42,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487339714] [2021-10-16 02:25:42,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:25:42,335 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:42,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:42,336 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:42,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-16 02:25:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:43,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:25:43,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:43,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:44,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:44,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487339714] [2021-10-16 02:25:44,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487339714] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:44,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [238263268] [2021-10-16 02:25:44,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:25:44,095 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:44,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:44,096 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:44,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-10-16 02:25:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:45,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:25:45,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:45,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:46,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [238263268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:46,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128498205] [2021-10-16 02:25:46,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-16 02:25:46,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:46,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:46,096 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:46,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-16 02:25:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:47,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:25:47,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:47,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:47,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128498205] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:47,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:25:47,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 7] total 28 [2021-10-16 02:25:47,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915917671] [2021-10-16 02:25:47,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-16 02:25:47,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:47,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-16 02:25:47,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2021-10-16 02:25:47,978 INFO L87 Difference]: Start difference. First operand 256 states and 863 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:49,999 INFO L93 Difference]: Finished difference Result 1000 states and 3159 transitions. [2021-10-16 02:25:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 02:25:50,000 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 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 22 [2021-10-16 02:25:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:50,010 INFO L225 Difference]: With dead ends: 1000 [2021-10-16 02:25:50,010 INFO L226 Difference]: Without dead ends: 1000 [2021-10-16 02:25:50,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1529.1ms TimeCoverageRelationStatistics Valid=622, Invalid=1448, Unknown=0, NotChecked=0, Total=2070 [2021-10-16 02:25:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-10-16 02:25:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 274. [2021-10-16 02:25:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.3223443223443225) internal successors, (907), 273 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 907 transitions. [2021-10-16 02:25:50,031 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 907 transitions. Word has length 22 [2021-10-16 02:25:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:50,031 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 907 transitions. [2021-10-16 02:25:50,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 907 transitions. [2021-10-16 02:25:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:25:50,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:50,033 INFO L512 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] [2021-10-16 02:25:50,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-16 02:25:50,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:50,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-10-16 02:25:50,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:50,650 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-16 02:25:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2045958948, now seen corresponding path program 1 times [2021-10-16 02:25:50,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:50,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050886240] [2021-10-16 02:25:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:50,651 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:50,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:50,657 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:50,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-16 02:25:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:51,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-16 02:25:51,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:52,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 85 [2021-10-16 02:25:52,486 INFO L354 Elim1Store]: treesize reduction 163, result has 15.1 percent of original size [2021-10-16 02:25:52,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-10-16 02:26:01,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:26:01,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:26:01,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:26:01,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:26:01,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:26:01,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:28:57,591 WARN L207 SmtUtils]: Spent 2.94 m on a formula simplification. DAG size of input: 347 DAG size of output: 123 [2021-10-16 02:28:57,593 INFO L354 Elim1Store]: treesize reduction 1666, result has 20.1 percent of original size [2021-10-16 02:28:57,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 108 treesize of output 463 [2021-10-16 02:34:03,612 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-16 02:34:03,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:34:03,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050886240] [2021-10-16 02:34:03,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-16 02:34:03,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [607067814] [2021-10-16 02:34:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:03,615 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:34:03,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:34:03,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-16 02:34:03,618 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:34:03,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-10-16 02:34:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-16 02:34:05,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:05,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-16 02:34:05,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61902279] [2021-10-16 02:34:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:34:05,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:34:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:34:05,837 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:34:05,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-16 02:34:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:34:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-16 02:34:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:34:07,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-10-16 02:34:07,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:34:07,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 02:34:07,308 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 02:34:07,308 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 02:34:07,313 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:34:07,314 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-16 02:34:07,314 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-16 02:34:07,314 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-16 02:34:07,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-10-16 02:34:07,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-10-16 02:34:07,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-16 02:34:07,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1532fdb-2d9d-4c7a-be83-cd0780a1c1ec/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:34:07,921 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-16 02:34:07,921 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:34:07,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:34:07 BasicIcfg [2021-10-16 02:34:07,941 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:34:07,941 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:34:07,942 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:34:07,942 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:34:07,942 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:24:03" (3/4) ... [2021-10-16 02:34:07,945 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:34:07,945 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:34:07,947 INFO L168 Benchmark]: Toolchain (without parser) took 606782.32 ms. Allocated memory was 90.2 MB in the beginning and 283.1 MB in the end (delta: 192.9 MB). Free memory was 55.8 MB in the beginning and 88.9 MB in the end (delta: -33.2 MB). Peak memory consumption was 162.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:07,948 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 72.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:34:07,948 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.36 ms. Allocated memory is still 90.2 MB. Free memory was 55.5 MB in the beginning and 72.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:07,948 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.62 ms. Allocated memory is still 90.2 MB. Free memory was 72.9 MB in the beginning and 70.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:07,949 INFO L168 Benchmark]: Boogie Preprocessor took 60.39 ms. Allocated memory is still 90.2 MB. Free memory was 70.7 MB in the beginning and 68.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:07,949 INFO L168 Benchmark]: RCFGBuilder took 1503.17 ms. Allocated memory is still 90.2 MB. Free memory was 68.9 MB in the beginning and 70.9 MB in the end (delta: -2.0 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:07,949 INFO L168 Benchmark]: TraceAbstraction took 604731.50 ms. Allocated memory was 90.2 MB in the beginning and 283.1 MB in the end (delta: 192.9 MB). Free memory was 70.5 MB in the beginning and 88.9 MB in the end (delta: -18.4 MB). Peak memory consumption was 175.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:34:07,950 INFO L168 Benchmark]: Witness Printer took 3.86 ms. Allocated memory is still 283.1 MB. Free memory is still 88.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:34:07,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 72.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 413.36 ms. Allocated memory is still 90.2 MB. Free memory was 55.5 MB in the beginning and 72.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.62 ms. Allocated memory is still 90.2 MB. Free memory was 72.9 MB in the beginning and 70.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.39 ms. Allocated memory is still 90.2 MB. Free memory was 70.7 MB in the beginning and 68.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1503.17 ms. Allocated memory is still 90.2 MB. Free memory was 68.9 MB in the beginning and 70.9 MB in the end (delta: -2.0 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 604731.50 ms. Allocated memory was 90.2 MB in the beginning and 283.1 MB in the end (delta: 192.9 MB). Free memory was 70.5 MB in the beginning and 88.9 MB in the end (delta: -18.4 MB). Peak memory consumption was 175.2 MB. Max. memory is 16.1 GB. * Witness Printer took 3.86 ms. Allocated memory is still 283.1 MB. Free memory is still 88.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 23234.1ms, 134 PlacesBefore, 34 PlacesAfterwards, 136 TransitionsBefore, 28 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 8 FixpointIterations, 74 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 129 TotalNumberOfCompositions, 1652 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1509, positive: 1472, positive conditional: 0, positive unconditional: 1472, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 897, positive: 886, positive conditional: 0, positive unconditional: 886, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 897, positive: 886, positive conditional: 0, positive unconditional: 886, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 570, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 570, negative conditional: 0, negative unconditional: 570, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1509, positive: 586, positive conditional: 0, positive unconditional: 586, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 897, unknown conditional: 0, unknown unconditional: 897] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 95]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L40] 0 int* A; [L41] 0 int res1, res2, M, N; [L77] 0 pthread_t t1, t2, t3; [L80] 0 M = __VERIFIER_nondet_int() [L81] 0 N = __VERIFIER_nondet_int() [L37] COND FALSE 0 !(!cond) [L37] COND FALSE 0 !(!cond) [L104] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L105] 0 int i = 0; [L105] COND TRUE 0 i < size [L106] 0 arr[i] = __VERIFIER_nondet_int() [L105] 0 i++ [L105] COND FALSE 0 !(i < size) [L108] 0 return arr; [L82] 0 A = create_fresh_int_array(N) [L37] COND TRUE 0 !cond [L87] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) [L47] 1 int i=0; [L47] COND TRUE 1 i