./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs --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 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:03:16,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:03:16,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:03:16,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:03:16,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:03:16,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:03:16,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:03:16,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:03:16,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:03:16,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:03:16,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:03:16,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:03:16,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:03:16,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:03:16,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:03:16,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:03:16,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:03:16,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:03:16,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:03:16,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:03:16,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:03:16,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:03:16,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:03:16,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:03:16,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:03:16,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:03:16,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:03:16,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:03:16,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:03:16,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:03:16,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:03:16,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:03:16,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:03:16,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:03:16,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:03:16,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:03:16,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:03:16,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:03:16,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:03:16,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:03:16,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:03:16,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:03:16,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:03:16,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:03:16,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:03:16,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:03:16,652 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:03:16,652 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:03:16,652 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:03:16,653 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:03:16,653 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:03:16,653 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:03:16,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:03:16,654 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:03:16,654 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:03:16,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:03:16,654 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:03:16,655 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:03:16,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:03:16,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:03:16,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:03:16,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:03:16,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:03:16,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:03:16,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:03:16,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:03:16,657 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:03:16,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:03:16,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:03:16,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:03:16,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:03:16,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:03:16,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:03:16,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:16,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:03:16,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:03:16,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:03:16,660 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:03:16,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:03:16,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:03:16,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:03:16,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:03:16,661 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_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 [2021-11-19 14:03:16,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:03:16,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:03:16,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:03:16,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:03:16,924 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:03:16,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-19 14:03:17,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data/c29e3127a/4f17e7e5648a488a98bb8186d0a4c7ae/FLAGdacb9c5d6 [2021-11-19 14:03:17,499 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:03:17,500 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-19 14:03:17,515 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data/c29e3127a/4f17e7e5648a488a98bb8186d0a4c7ae/FLAGdacb9c5d6 [2021-11-19 14:03:17,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data/c29e3127a/4f17e7e5648a488a98bb8186d0a4c7ae [2021-11-19 14:03:17,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:03:17,876 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:03:17,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:17,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:03:17,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:03:17,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:17" (1/1) ... [2021-11-19 14:03:17,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c439c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:17, skipping insertion in model container [2021-11-19 14:03:17,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:17" (1/1) ... [2021-11-19 14:03:17,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:03:17,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:03:18,167 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-19 14:03:18,178 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:18,188 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) [2021-11-19 14:03:18,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@616417f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:18, skipping insertion in model container [2021-11-19 14:03:18,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:18,190 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:03:18,192 INFO L158 Benchmark]: Toolchain (without parser) took 314.94ms. Allocated memory is still 111.1MB. Free memory was 78.5MB in the beginning and 85.2MB in the end (delta: -6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:03:18,193 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:03:18,194 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.43ms. Allocated memory is still 111.1MB. Free memory was 78.2MB in the beginning and 85.2MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:03:18,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.43ms. Allocated memory is still 111.1MB. Free memory was 78.2MB in the beginning and 85.2MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 151]: 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs --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 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:03:20,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:03:20,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:03:20,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:03:20,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:03:20,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:03:20,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:03:20,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:03:20,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:03:20,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:03:20,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:03:20,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:03:20,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:03:20,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:03:20,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:03:20,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:03:20,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:03:20,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:03:20,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:03:20,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:03:20,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:03:20,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:03:20,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:03:20,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:03:20,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:03:20,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:03:20,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:03:20,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:03:20,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:03:20,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:03:20,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:03:20,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:03:20,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:03:20,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:03:20,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:03:20,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:03:20,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:03:20,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:03:20,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:03:20,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:03:20,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:03:20,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:03:21,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:03:21,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:03:21,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:03:21,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:03:21,052 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:03:21,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:03:21,052 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:03:21,052 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:03:21,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:03:21,053 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:03:21,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:03:21,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:03:21,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:03:21,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:03:21,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:03:21,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:03:21,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:03:21,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:03:21,058 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:03:21,059 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:03:21,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:03:21,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:03:21,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:03:21,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:03:21,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:03:21,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:03:21,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:03:21,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:21,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:03:21,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:03:21,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:03:21,062 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:03:21,062 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:21,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:03:21,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:03:21,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:03:21,064 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_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 [2021-11-19 14:03:21,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:03:21,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:03:21,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:03:21,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:03:21,605 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:03:21,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-19 14:03:21,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data/000f7ce24/9ae7a1ff37e74fde98d2449bef0f030e/FLAG8058c8d27 [2021-11-19 14:03:22,406 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:03:22,411 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-19 14:03:22,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data/000f7ce24/9ae7a1ff37e74fde98d2449bef0f030e/FLAG8058c8d27 [2021-11-19 14:03:22,701 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/data/000f7ce24/9ae7a1ff37e74fde98d2449bef0f030e [2021-11-19 14:03:22,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:03:22,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:03:22,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:22,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:03:22,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:03:22,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:22" (1/1) ... [2021-11-19 14:03:22,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d30615d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:22, skipping insertion in model container [2021-11-19 14:03:22,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:22" (1/1) ... [2021-11-19 14:03:22,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:03:22,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:03:23,108 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-19 14:03:23,131 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:23,176 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:03:23,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:03:23,253 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-19 14:03:23,259 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:23,269 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:03:23,330 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-19 14:03:23,352 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:23,383 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:03:23,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23 WrapperNode [2021-11-19 14:03:23,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:23,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:03:23,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:03:23,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:03:23,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,493 INFO L137 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 350 [2021-11-19 14:03:23,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:03:23,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:03:23,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:03:23,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:03:23,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:03:23,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:03:23,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:03:23,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:03:23,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (1/1) ... [2021-11-19 14:03:23,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:23,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:03:23,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:03:23,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:03:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:03:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:03:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:03:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:03:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-19 14:03:23,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-19 14:03:23,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-19 14:03:23,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-19 14:03:23,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-19 14:03:23,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-19 14:03:23,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:03:23,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:03:23,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:03:23,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:03:23,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:03:23,718 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-19 14:03:23,852 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:03:23,855 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:03:24,712 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:03:24,745 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:03:24,745 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 14:03:24,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:03:24 BoogieIcfgContainer [2021-11-19 14:03:24,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:03:24,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:03:24,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:03:24,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:03:24,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:03:22" (1/3) ... [2021-11-19 14:03:24,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cccf0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:03:24, skipping insertion in model container [2021-11-19 14:03:24,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:23" (2/3) ... [2021-11-19 14:03:24,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cccf0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:03:24, skipping insertion in model container [2021-11-19 14:03:24,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:03:24" (3/3) ... [2021-11-19 14:03:24,766 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2021-11-19 14:03:24,774 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-19 14:03:24,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:03:24,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:03:24,775 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-19 14:03:24,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,892 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,892 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,892 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,893 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,893 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,895 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,895 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,895 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,896 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,896 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,896 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,896 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,897 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,897 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,897 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,898 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,899 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,900 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,901 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,901 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,901 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,902 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,902 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,903 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,903 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,903 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,911 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,912 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,920 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,920 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,920 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,927 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,927 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,932 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,932 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,933 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,933 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,934 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,934 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,934 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,934 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,935 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,935 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,935 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,935 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,936 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,936 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,936 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,936 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,936 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,937 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,938 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,938 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,938 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,939 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,939 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,939 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,939 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,939 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,940 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,940 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,940 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,940 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,940 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,941 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,941 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,941 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,941 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,941 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,942 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,942 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,942 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,942 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,943 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,943 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,943 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,943 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,943 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,944 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,945 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,945 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,945 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,945 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,946 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,947 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,947 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,953 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,953 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,953 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,966 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,966 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,966 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,967 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,968 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,968 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,968 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,969 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,969 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,972 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,973 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,975 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,984 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,985 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,985 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,985 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,985 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,985 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,986 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,986 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,986 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,986 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,986 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,987 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,987 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,987 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,987 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,987 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,987 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,988 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,989 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,989 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,989 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,990 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,990 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,990 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,990 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,990 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,990 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,991 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,991 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,991 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,991 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,991 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,991 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,992 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,992 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,992 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,993 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,996 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,996 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,996 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,996 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:24,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,002 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,002 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,002 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,002 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,002 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,003 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,007 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,007 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,007 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,013 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,013 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,013 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,013 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,013 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,013 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,013 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,015 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,015 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,015 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,016 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,016 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,016 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,016 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,016 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,017 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,017 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,017 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,017 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,017 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,018 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,018 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,018 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,018 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,018 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,018 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,019 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,019 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,019 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,019 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,019 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,019 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,020 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,020 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,020 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,020 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,020 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,021 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,021 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,021 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,021 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,021 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,021 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,022 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,022 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,022 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,022 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,022 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,023 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,023 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,023 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,023 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,023 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,023 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,024 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,024 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,024 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,024 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,025 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,025 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,025 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,025 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,025 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,027 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,027 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,027 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,027 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,027 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,027 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,028 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,028 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,028 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,028 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,028 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,029 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,029 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,029 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,029 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,029 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,030 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,030 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,030 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,030 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,030 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,030 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,031 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,031 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,031 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,031 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,031 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,031 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,032 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,032 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,032 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,032 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,032 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,033 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,033 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,033 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,033 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,033 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,034 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,034 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,034 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,034 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,034 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,034 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,035 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,035 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,035 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,035 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,035 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,035 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,036 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,036 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,036 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,036 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,036 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,037 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,037 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,037 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,037 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,037 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,037 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,038 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,038 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,038 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,038 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,038 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,040 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,040 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,040 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,040 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,040 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,040 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,041 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,041 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,041 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,041 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,041 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,042 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,042 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,042 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,042 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,042 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,042 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,043 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,043 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,043 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,043 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,043 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,043 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,044 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,044 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,044 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,044 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,044 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,044 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,045 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,045 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,045 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,045 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,045 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,048 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,049 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,049 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,070 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,071 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,071 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,071 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,071 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,071 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,072 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,072 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,072 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,072 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,073 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,073 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,073 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,073 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,073 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,074 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,074 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,077 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,077 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,078 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,078 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,078 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,078 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,078 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,079 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:03:25,088 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-19 14:03:25,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:03:25,166 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:03:25,167 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-19 14:03:25,201 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-19 14:03:25,216 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 412 places, 446 transitions, 916 flow [2021-11-19 14:03:25,220 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 412 places, 446 transitions, 916 flow [2021-11-19 14:03:25,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 412 places, 446 transitions, 916 flow [2021-11-19 14:03:25,513 INFO L129 PetriNetUnfolder]: 44/443 cut-off events. [2021-11-19 14:03:25,513 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-19 14:03:25,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 443 events. 44/443 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1296 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 316. Up to 2 conditions per place. [2021-11-19 14:03:25,579 INFO L116 LiptonReduction]: Number of co-enabled transitions 65934 [2021-11-19 14:04:05,495 INFO L131 LiptonReduction]: Checked pairs total: 56997 [2021-11-19 14:04:05,495 INFO L133 LiptonReduction]: Total number of compositions: 544 [2021-11-19 14:04:05,506 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 28 transitions, 80 flow [2021-11-19 14:04:05,527 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) [2021-11-19 14:04:05,530 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) [2021-11-19 14:04:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 14:04:05,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:05,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:05,543 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash 501354084, now seen corresponding path program 1 times [2021-11-19 14:04:05,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:05,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895813606] [2021-11-19 14:04:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:05,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:05,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:05,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:04:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:04:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:05,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:06,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:06,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895813606] [2021-11-19 14:04:06,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895813606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:06,013 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:06,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 14:04:06,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290278066] [2021-11-19 14:04:06,016 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:06,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:04:06,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:04:06,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:04:06,052 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, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-11-19 14:04:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:06,365 INFO L93 Difference]: Finished difference Result 109 states and 329 transitions. [2021-11-19 14:04:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:04:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 20 [2021-11-19 14:04:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:06,383 INFO L225 Difference]: With dead ends: 109 [2021-11-19 14:04:06,383 INFO L226 Difference]: Without dead ends: 109 [2021-11-19 14:04:06,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:04:06,393 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:06,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:04:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-19 14:04:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-19 14:04:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 3.0462962962962963) internal successors, (329), 108 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 329 transitions. [2021-11-19 14:04:06,482 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 329 transitions. Word has length 20 [2021-11-19 14:04:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:06,483 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 329 transitions. [2021-11-19 14:04:06,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2021-11-19 14:04:06,489 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 329 transitions. [2021-11-19 14:04:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 14:04:06,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:06,494 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:06,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:06,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:06,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:06,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:06,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1422639108, now seen corresponding path program 1 times [2021-11-19 14:04:06,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:06,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800772642] [2021-11-19 14:04:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:06,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:06,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:06,714 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:06,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:04:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:04:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:07,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:07,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:07,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800772642] [2021-11-19 14:04:07,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800772642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:07,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064717725] [2021-11-19 14:04:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:07,214 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:07,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:04:07,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:04:07,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-19 14:04:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:07,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:04:07,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:07,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:07,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064717725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:07,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618483219] [2021-11-19 14:04:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:07,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:04:07,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:04:07,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:04:07,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:04:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:07,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:04:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:07,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:08,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618483219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:08,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:04:08,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-19 14:04:08,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890290430] [2021-11-19 14:04:08,011 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:04:08,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:04:08,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:08,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:04:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:04:08,014 INFO L87 Difference]: Start difference. First operand 109 states and 329 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:08,453 INFO L93 Difference]: Finished difference Result 110 states and 330 transitions. [2021-11-19 14:04:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:04:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-11-19 14:04:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:08,456 INFO L225 Difference]: With dead ends: 110 [2021-11-19 14:04:08,456 INFO L226 Difference]: Without dead ends: 110 [2021-11-19 14:04:08,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:04:08,458 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:08,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:04:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-19 14:04:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-19 14:04:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 3.0275229357798166) internal successors, (330), 109 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 330 transitions. [2021-11-19 14:04:08,474 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 330 transitions. Word has length 22 [2021-11-19 14:04:08,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:08,474 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 330 transitions. [2021-11-19 14:04:08,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 330 transitions. [2021-11-19 14:04:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 14:04:08,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:08,477 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:08,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:08,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:08,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:09,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:09,084 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1441128017, now seen corresponding path program 2 times [2021-11-19 14:04:09,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:09,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441753251] [2021-11-19 14:04:09,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:04:09,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:09,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:09,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:09,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:04:09,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 14:04:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:09,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:04:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:10,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:11,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:11,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441753251] [2021-11-19 14:04:11,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441753251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:11,929 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:11,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:04:11,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913013107] [2021-11-19 14:04:11,930 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:11,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:04:11,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:11,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:04:11,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:04:11,932 INFO L87 Difference]: Start difference. First operand 110 states and 330 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:13,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:13,236 INFO L93 Difference]: Finished difference Result 183 states and 543 transitions. [2021-11-19 14:04:13,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:04:13,237 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2021-11-19 14:04:13,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:13,241 INFO L225 Difference]: With dead ends: 183 [2021-11-19 14:04:13,241 INFO L226 Difference]: Without dead ends: 172 [2021-11-19 14:04:13,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:13,243 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:13,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:04:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-19 14:04:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 134. [2021-11-19 14:04:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.030075187969925) internal successors, (403), 133 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 403 transitions. [2021-11-19 14:04:13,262 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 403 transitions. Word has length 23 [2021-11-19 14:04:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:13,264 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 403 transitions. [2021-11-19 14:04:13,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 403 transitions. [2021-11-19 14:04:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 14:04:13,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:13,267 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:13,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:13,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:13,494 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:13,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1393800115, now seen corresponding path program 3 times [2021-11-19 14:04:13,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:13,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63603209] [2021-11-19 14:04:13,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:04:13,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:13,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:13,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:13,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:04:13,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-19 14:04:13,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:04:13,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:14,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:17,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:17,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63603209] [2021-11-19 14:04:17,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63603209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:17,443 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:17,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 14:04:17,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085112735] [2021-11-19 14:04:17,444 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:17,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:04:17,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:17,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:04:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:04:17,450 INFO L87 Difference]: Start difference. First operand 134 states and 403 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:19,155 INFO L93 Difference]: Finished difference Result 221 states and 653 transitions. [2021-11-19 14:04:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:04:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2021-11-19 14:04:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:19,159 INFO L225 Difference]: With dead ends: 221 [2021-11-19 14:04:19,159 INFO L226 Difference]: Without dead ends: 210 [2021-11-19 14:04:19,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:19,161 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:19,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:04:19,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-19 14:04:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 152. [2021-11-19 14:04:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.1059602649006623) internal successors, (469), 151 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 469 transitions. [2021-11-19 14:04:19,210 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 469 transitions. Word has length 23 [2021-11-19 14:04:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:19,211 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 469 transitions. [2021-11-19 14:04:19,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 469 transitions. [2021-11-19 14:04:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 14:04:19,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:19,218 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:19,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:19,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:19,420 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:19,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2064294553, now seen corresponding path program 4 times [2021-11-19 14:04:19,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:19,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499023938] [2021-11-19 14:04:19,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:04:19,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:19,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:19,423 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:19,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:04:19,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:04:19,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:04:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:20,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:23,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:23,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499023938] [2021-11-19 14:04:23,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499023938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:23,133 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:23,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 14:04:23,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097669599] [2021-11-19 14:04:23,133 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:23,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:04:23,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:04:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:04:23,135 INFO L87 Difference]: Start difference. First operand 152 states and 469 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:24,478 INFO L93 Difference]: Finished difference Result 209 states and 628 transitions. [2021-11-19 14:04:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:04:24,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2021-11-19 14:04:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:24,488 INFO L225 Difference]: With dead ends: 209 [2021-11-19 14:04:24,488 INFO L226 Difference]: Without dead ends: 198 [2021-11-19 14:04:24,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:24,490 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:24,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:04:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-19 14:04:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 152. [2021-11-19 14:04:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.1059602649006623) internal successors, (469), 151 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 469 transitions. [2021-11-19 14:04:24,515 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 469 transitions. Word has length 23 [2021-11-19 14:04:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:24,516 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 469 transitions. [2021-11-19 14:04:24,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 469 transitions. [2021-11-19 14:04:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 14:04:24,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:24,524 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:24,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:24,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:24,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:24,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1365569937, now seen corresponding path program 5 times [2021-11-19 14:04:24,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:24,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40660220] [2021-11-19 14:04:24,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:04:24,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:24,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:24,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:24,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:04:24,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:04:24,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:04:24,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:25,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:27,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:27,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40660220] [2021-11-19 14:04:27,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40660220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:27,034 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:27,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:04:27,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907074648] [2021-11-19 14:04:27,034 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:27,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:04:27,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:27,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:04:27,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:04:27,040 INFO L87 Difference]: Start difference. First operand 152 states and 469 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:28,287 INFO L93 Difference]: Finished difference Result 241 states and 728 transitions. [2021-11-19 14:04:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:04:28,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2021-11-19 14:04:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:28,290 INFO L225 Difference]: With dead ends: 241 [2021-11-19 14:04:28,291 INFO L226 Difference]: Without dead ends: 230 [2021-11-19 14:04:28,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:28,292 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:28,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:04:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-19 14:04:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 182. [2021-11-19 14:04:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 3.110497237569061) internal successors, (563), 181 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 563 transitions. [2021-11-19 14:04:28,306 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 563 transitions. Word has length 23 [2021-11-19 14:04:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:28,307 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 563 transitions. [2021-11-19 14:04:28,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 563 transitions. [2021-11-19 14:04:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 14:04:28,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:28,309 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:28,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:28,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:28,524 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash -834938329, now seen corresponding path program 6 times [2021-11-19 14:04:28,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:28,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548810062] [2021-11-19 14:04:28,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:04:28,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:28,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:28,526 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:28,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:04:28,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-11-19 14:04:28,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:28,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:04:28,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:29,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:31,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:31,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548810062] [2021-11-19 14:04:31,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548810062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:31,943 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:31,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 14:04:31,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278178394] [2021-11-19 14:04:31,943 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:31,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:04:31,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:31,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:04:31,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:04:31,945 INFO L87 Difference]: Start difference. First operand 182 states and 563 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:33,478 INFO L93 Difference]: Finished difference Result 279 states and 836 transitions. [2021-11-19 14:04:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:04:33,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2021-11-19 14:04:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:33,482 INFO L225 Difference]: With dead ends: 279 [2021-11-19 14:04:33,482 INFO L226 Difference]: Without dead ends: 268 [2021-11-19 14:04:33,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:33,483 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:33,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:04:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-19 14:04:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 190. [2021-11-19 14:04:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 3.2063492063492065) internal successors, (606), 189 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 606 transitions. [2021-11-19 14:04:33,499 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 606 transitions. Word has length 23 [2021-11-19 14:04:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:33,500 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 606 transitions. [2021-11-19 14:04:33,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 606 transitions. [2021-11-19 14:04:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 14:04:33,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:33,502 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:33,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:33,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:33,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:33,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1671810957, now seen corresponding path program 7 times [2021-11-19 14:04:33,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:33,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574320857] [2021-11-19 14:04:33,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:04:33,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:33,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:33,718 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:33,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:04:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:33,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:04:33,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:34,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:37,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:37,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574320857] [2021-11-19 14:04:37,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574320857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:37,013 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:37,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 14:04:37,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014816979] [2021-11-19 14:04:37,013 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:37,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:04:37,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:37,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:04:37,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:04:37,014 INFO L87 Difference]: Start difference. First operand 190 states and 606 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:38,355 INFO L93 Difference]: Finished difference Result 257 states and 788 transitions. [2021-11-19 14:04:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:04:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 23 [2021-11-19 14:04:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:38,358 INFO L225 Difference]: With dead ends: 257 [2021-11-19 14:04:38,358 INFO L226 Difference]: Without dead ends: 246 [2021-11-19 14:04:38,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:38,359 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:38,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:04:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-19 14:04:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 182. [2021-11-19 14:04:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 3.110497237569061) internal successors, (563), 181 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 563 transitions. [2021-11-19 14:04:38,370 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 563 transitions. Word has length 23 [2021-11-19 14:04:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:38,371 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 563 transitions. [2021-11-19 14:04:38,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 563 transitions. [2021-11-19 14:04:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:04:38,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:38,373 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:38,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:38,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:38,585 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:38,585 INFO L85 PathProgramCache]: Analyzing trace with hash 232461433, now seen corresponding path program 1 times [2021-11-19 14:04:38,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:38,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113445394] [2021-11-19 14:04:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:38,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:38,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:38,587 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:38,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:04:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:38,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:04:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:39,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:39,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:39,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113445394] [2021-11-19 14:04:39,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113445394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:39,571 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:39,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:04:39,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111514219] [2021-11-19 14:04:39,571 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:39,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:04:39,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:39,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:04:39,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:04:39,572 INFO L87 Difference]: Start difference. First operand 182 states and 563 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:41,079 INFO L93 Difference]: Finished difference Result 362 states and 1089 transitions. [2021-11-19 14:04:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:04:41,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:04:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:41,084 INFO L225 Difference]: With dead ends: 362 [2021-11-19 14:04:41,084 INFO L226 Difference]: Without dead ends: 354 [2021-11-19 14:04:41,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:04:41,085 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:41,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:04:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-19 14:04:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 200. [2021-11-19 14:04:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 3.0854271356783918) internal successors, (614), 199 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) [2021-11-19 14:04:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 614 transitions. [2021-11-19 14:04:41,096 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 614 transitions. Word has length 24 [2021-11-19 14:04:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:41,097 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 614 transitions. [2021-11-19 14:04:41,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 614 transitions. [2021-11-19 14:04:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:04:41,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:41,099 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:41,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:41,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:41,311 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1375397838, now seen corresponding path program 1 times [2021-11-19 14:04:41,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:41,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070699477] [2021-11-19 14:04:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:41,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:41,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:41,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:41,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:04:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:04:41,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:41,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:41,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:41,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070699477] [2021-11-19 14:04:41,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070699477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:41,980 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:41,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:04:41,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531610066] [2021-11-19 14:04:41,980 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:41,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:04:41,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:41,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:04:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:04:41,981 INFO L87 Difference]: Start difference. First operand 200 states and 614 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:42,849 INFO L93 Difference]: Finished difference Result 392 states and 1173 transitions. [2021-11-19 14:04:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:04:42,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:04:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:42,855 INFO L225 Difference]: With dead ends: 392 [2021-11-19 14:04:42,855 INFO L226 Difference]: Without dead ends: 392 [2021-11-19 14:04:42,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:04:42,856 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:42,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:04:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-19 14:04:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 208. [2021-11-19 14:04:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 3.111111111111111) internal successors, (644), 207 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 644 transitions. [2021-11-19 14:04:42,871 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 644 transitions. Word has length 24 [2021-11-19 14:04:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:42,874 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 644 transitions. [2021-11-19 14:04:42,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 644 transitions. [2021-11-19 14:04:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:04:42,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:42,876 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:42,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:43,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:43,090 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:43,091 INFO L85 PathProgramCache]: Analyzing trace with hash 19371598, now seen corresponding path program 2 times [2021-11-19 14:04:43,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:43,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171140897] [2021-11-19 14:04:43,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:04:43,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:43,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:43,093 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:43,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:04:43,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:04:43,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:43,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:04:43,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:43,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:44,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:44,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171140897] [2021-11-19 14:04:44,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171140897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:44,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:44,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:04:44,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574226872] [2021-11-19 14:04:44,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:44,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:04:44,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:04:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:04:44,088 INFO L87 Difference]: Start difference. First operand 208 states and 644 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:45,205 INFO L93 Difference]: Finished difference Result 402 states and 1191 transitions. [2021-11-19 14:04:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:04:45,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:04:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:45,211 INFO L225 Difference]: With dead ends: 402 [2021-11-19 14:04:45,211 INFO L226 Difference]: Without dead ends: 396 [2021-11-19 14:04:45,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:04:45,212 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:45,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:04:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-19 14:04:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 222. [2021-11-19 14:04:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.1176470588235294) internal successors, (689), 221 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 689 transitions. [2021-11-19 14:04:45,229 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 689 transitions. Word has length 24 [2021-11-19 14:04:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:45,230 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 689 transitions. [2021-11-19 14:04:45,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 689 transitions. [2021-11-19 14:04:45,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:04:45,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:45,235 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:45,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:45,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:45,448 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1924212431, now seen corresponding path program 2 times [2021-11-19 14:04:45,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:45,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456470316] [2021-11-19 14:04:45,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:04:45,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:45,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:45,451 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:45,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:04:45,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:04:45,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:45,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:04:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:46,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:46,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:46,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456470316] [2021-11-19 14:04:46,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456470316] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:46,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:46,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:04:46,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447586289] [2021-11-19 14:04:46,778 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:46,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:04:46,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:46,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:04:46,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:04:46,779 INFO L87 Difference]: Start difference. First operand 222 states and 689 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:48,911 INFO L93 Difference]: Finished difference Result 388 states and 1179 transitions. [2021-11-19 14:04:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:04:48,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:04:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:48,916 INFO L225 Difference]: With dead ends: 388 [2021-11-19 14:04:48,917 INFO L226 Difference]: Without dead ends: 384 [2021-11-19 14:04:48,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:04:48,918 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:48,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:04:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-19 14:04:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 230. [2021-11-19 14:04:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.1048034934497815) internal successors, (711), 229 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 711 transitions. [2021-11-19 14:04:48,938 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 711 transitions. Word has length 24 [2021-11-19 14:04:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:48,939 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 711 transitions. [2021-11-19 14:04:48,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 711 transitions. [2021-11-19 14:04:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:04:48,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:48,941 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:48,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:49,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:49,157 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:49,157 INFO L85 PathProgramCache]: Analyzing trace with hash -342637305, now seen corresponding path program 3 times [2021-11-19 14:04:49,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:49,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116515509] [2021-11-19 14:04:49,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:04:49,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:49,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:49,159 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:49,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:04:49,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:04:49,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:49,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:04:49,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:49,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:50,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:50,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116515509] [2021-11-19 14:04:50,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116515509] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:04:50,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:04:50,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:04:50,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912317326] [2021-11-19 14:04:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:50,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:04:50,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:04:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:04:50,337 INFO L87 Difference]: Start difference. First operand 230 states and 711 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) [2021-11-19 14:04:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:51,941 INFO L93 Difference]: Finished difference Result 464 states and 1334 transitions. [2021-11-19 14:04:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:04:51,943 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 24 [2021-11-19 14:04:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:51,947 INFO L225 Difference]: With dead ends: 464 [2021-11-19 14:04:51,948 INFO L226 Difference]: Without dead ends: 464 [2021-11-19 14:04:51,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:04:51,949 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:51,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:04:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-19 14:04:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 226. [2021-11-19 14:04:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.111111111111111) internal successors, (700), 225 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 700 transitions. [2021-11-19 14:04:51,967 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 700 transitions. Word has length 24 [2021-11-19 14:04:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:51,968 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 700 transitions. [2021-11-19 14:04:51,968 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) [2021-11-19 14:04:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 700 transitions. [2021-11-19 14:04:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:04:51,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:51,970 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:51,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:52,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:52,185 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1470033398, now seen corresponding path program 3 times [2021-11-19 14:04:52,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:52,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227081674] [2021-11-19 14:04:52,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:04:52,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:52,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:52,189 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:52,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:04:52,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:04:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:52,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:04:52,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:52,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:53,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:53,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227081674] [2021-11-19 14:04:53,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227081674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:53,036 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:53,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:04:53,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68648364] [2021-11-19 14:04:53,036 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:53,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:04:53,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:04:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:04:53,037 INFO L87 Difference]: Start difference. First operand 226 states and 700 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:54,224 INFO L93 Difference]: Finished difference Result 394 states and 1189 transitions. [2021-11-19 14:04:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:04:54,225 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:04:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:54,230 INFO L225 Difference]: With dead ends: 394 [2021-11-19 14:04:54,230 INFO L226 Difference]: Without dead ends: 394 [2021-11-19 14:04:54,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:04:54,231 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:54,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:04:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-19 14:04:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 216. [2021-11-19 14:04:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.116279069767442) internal successors, (670), 215 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 670 transitions. [2021-11-19 14:04:54,244 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 670 transitions. Word has length 24 [2021-11-19 14:04:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:54,245 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 670 transitions. [2021-11-19 14:04:54,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 670 transitions. [2021-11-19 14:04:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:04:54,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:54,247 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:54,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 14:04:54,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:54,472 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:54,473 INFO L85 PathProgramCache]: Analyzing trace with hash -339502710, now seen corresponding path program 4 times [2021-11-19 14:04:54,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:54,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070476447] [2021-11-19 14:04:54,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:04:54,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:54,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:54,476 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:54,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:04:54,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:04:54,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:54,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:04:54,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:54,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:55,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:55,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070476447] [2021-11-19 14:04:55,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070476447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:55,405 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:55,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:04:55,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655872616] [2021-11-19 14:04:55,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:55,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:04:55,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:04:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:04:55,407 INFO L87 Difference]: Start difference. First operand 216 states and 670 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:56,332 INFO L93 Difference]: Finished difference Result 390 states and 1170 transitions. [2021-11-19 14:04:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:04:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:04:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:56,337 INFO L225 Difference]: With dead ends: 390 [2021-11-19 14:04:56,338 INFO L226 Difference]: Without dead ends: 376 [2021-11-19 14:04:56,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:04:56,339 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:56,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:04:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-19 14:04:56,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 222. [2021-11-19 14:04:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.0995475113122173) internal successors, (685), 221 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 685 transitions. [2021-11-19 14:04:56,354 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 685 transitions. Word has length 24 [2021-11-19 14:04:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:56,355 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 685 transitions. [2021-11-19 14:04:56,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 685 transitions. [2021-11-19 14:04:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:04:56,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:56,357 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:56,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:56,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:56,581 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:56,581 INFO L85 PathProgramCache]: Analyzing trace with hash 164217780, now seen corresponding path program 5 times [2021-11-19 14:04:56,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:56,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801350388] [2021-11-19 14:04:56,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:04:56,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:56,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:56,583 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:56,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:04:56,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:04:56,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:04:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:57,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:57,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:57,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801350388] [2021-11-19 14:04:57,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801350388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:57,646 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:57,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:04:57,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487082570] [2021-11-19 14:04:57,646 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:57,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:04:57,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:04:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:04:57,648 INFO L87 Difference]: Start difference. First operand 222 states and 685 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:59,066 INFO L93 Difference]: Finished difference Result 412 states and 1225 transitions. [2021-11-19 14:04:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:04:59,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:04:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:59,076 INFO L225 Difference]: With dead ends: 412 [2021-11-19 14:04:59,076 INFO L226 Difference]: Without dead ends: 406 [2021-11-19 14:04:59,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:04:59,077 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:59,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:04:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-19 14:04:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 236. [2021-11-19 14:04:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.106382978723404) internal successors, (730), 235 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 730 transitions. [2021-11-19 14:04:59,092 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 730 transitions. Word has length 24 [2021-11-19 14:04:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:59,093 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 730 transitions. [2021-11-19 14:04:59,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 730 transitions. [2021-11-19 14:04:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:04:59,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:59,096 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:59,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:59,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:59,315 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:04:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1779366249, now seen corresponding path program 4 times [2021-11-19 14:04:59,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:59,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718037970] [2021-11-19 14:04:59,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:04:59,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:59,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:59,317 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:59,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:04:59,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:04:59,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:04:59,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:04:59,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:04:59,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:00,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:00,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718037970] [2021-11-19 14:05:00,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718037970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:00,342 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:00,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:05:00,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140047540] [2021-11-19 14:05:00,343 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:00,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:05:00,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:00,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:05:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:05:00,344 INFO L87 Difference]: Start difference. First operand 236 states and 730 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:01,858 INFO L93 Difference]: Finished difference Result 416 states and 1271 transitions. [2021-11-19 14:05:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:05:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:01,862 INFO L225 Difference]: With dead ends: 416 [2021-11-19 14:05:01,862 INFO L226 Difference]: Without dead ends: 412 [2021-11-19 14:05:01,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:05:01,863 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:01,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:05:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-19 14:05:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 250. [2021-11-19 14:05:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.104417670682731) internal successors, (773), 249 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 773 transitions. [2021-11-19 14:05:01,877 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 773 transitions. Word has length 24 [2021-11-19 14:05:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:01,877 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 773 transitions. [2021-11-19 14:05:01,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 773 transitions. [2021-11-19 14:05:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:01,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:01,879 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:01,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:02,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:02,093 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:02,094 INFO L85 PathProgramCache]: Analyzing trace with hash -197791123, now seen corresponding path program 5 times [2021-11-19 14:05:02,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:02,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881051445] [2021-11-19 14:05:02,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:05:02,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:02,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:02,096 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:02,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:05:02,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:05:02,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:02,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:05:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:02,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:03,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:03,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881051445] [2021-11-19 14:05:03,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881051445] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:05:03,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:05:03,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:05:03,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482733236] [2021-11-19 14:05:03,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:03,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:05:03,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:03,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:05:03,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:05:03,145 INFO L87 Difference]: Start difference. First operand 250 states and 773 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) [2021-11-19 14:05:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:05,084 INFO L93 Difference]: Finished difference Result 434 states and 1311 transitions. [2021-11-19 14:05:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:05:05,086 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 24 [2021-11-19 14:05:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:05,089 INFO L225 Difference]: With dead ends: 434 [2021-11-19 14:05:05,090 INFO L226 Difference]: Without dead ends: 434 [2021-11-19 14:05:05,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:05:05,091 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:05,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:05:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-19 14:05:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 250. [2021-11-19 14:05:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.104417670682731) internal successors, (773), 249 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 773 transitions. [2021-11-19 14:05:05,108 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 773 transitions. Word has length 24 [2021-11-19 14:05:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:05,109 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 773 transitions. [2021-11-19 14:05:05,109 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) [2021-11-19 14:05:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 773 transitions. [2021-11-19 14:05:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:05,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:05,111 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:05,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:05,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:05,324 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:05,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1325187216, now seen corresponding path program 6 times [2021-11-19 14:05:05,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:05,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241670842] [2021-11-19 14:05:05,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:05:05,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:05,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:05,340 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:05,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:05:05,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:05:05,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:05,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:05,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:06,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:06,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241670842] [2021-11-19 14:05:06,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241670842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:06,442 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:06,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:05:06,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377500463] [2021-11-19 14:05:06,442 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:06,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:05:06,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:05:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:05:06,443 INFO L87 Difference]: Start difference. First operand 250 states and 773 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:07,746 INFO L93 Difference]: Finished difference Result 402 states and 1226 transitions. [2021-11-19 14:05:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:07,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:07,750 INFO L225 Difference]: With dead ends: 402 [2021-11-19 14:05:07,750 INFO L226 Difference]: Without dead ends: 402 [2021-11-19 14:05:07,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:05:07,751 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:07,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:05:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-19 14:05:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 236. [2021-11-19 14:05:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.1148936170212767) internal successors, (732), 235 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 732 transitions. [2021-11-19 14:05:07,762 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 732 transitions. Word has length 24 [2021-11-19 14:05:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:07,763 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 732 transitions. [2021-11-19 14:05:07,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 732 transitions. [2021-11-19 14:05:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:07,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:07,765 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:07,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-19 14:05:07,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:07,978 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2034226455, now seen corresponding path program 6 times [2021-11-19 14:05:07,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:07,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59115279] [2021-11-19 14:05:07,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:05:07,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:07,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:07,979 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:07,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:05:08,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:05:08,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:08,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:05:08,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:08,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:08,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:08,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59115279] [2021-11-19 14:05:08,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59115279] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:05:08,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:05:08,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-19 14:05:08,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965625379] [2021-11-19 14:05:08,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:08,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:05:08,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:05:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:05:08,734 INFO L87 Difference]: Start difference. First operand 236 states and 732 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) [2021-11-19 14:05:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:09,761 INFO L93 Difference]: Finished difference Result 418 states and 1262 transitions. [2021-11-19 14:05:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:05:09,762 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 24 [2021-11-19 14:05:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:09,765 INFO L225 Difference]: With dead ends: 418 [2021-11-19 14:05:09,766 INFO L226 Difference]: Without dead ends: 418 [2021-11-19 14:05:09,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:05:09,767 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:09,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:05:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-19 14:05:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 228. [2021-11-19 14:05:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.1101321585903086) internal successors, (706), 227 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 706 transitions. [2021-11-19 14:05:09,778 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 706 transitions. Word has length 24 [2021-11-19 14:05:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:09,778 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 706 transitions. [2021-11-19 14:05:09,778 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) [2021-11-19 14:05:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 706 transitions. [2021-11-19 14:05:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:09,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:09,780 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:09,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:09,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:09,992 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:09,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:09,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1032935161, now seen corresponding path program 7 times [2021-11-19 14:05:09,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:09,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30804295] [2021-11-19 14:05:09,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:05:09,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:09,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:09,994 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:09,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:05:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:05:10,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:10,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:11,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:11,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30804295] [2021-11-19 14:05:11,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30804295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:11,261 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:11,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:05:11,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309665104] [2021-11-19 14:05:11,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:11,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:05:11,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:11,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:05:11,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:05:11,262 INFO L87 Difference]: Start difference. First operand 228 states and 706 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:12,765 INFO L93 Difference]: Finished difference Result 468 states and 1396 transitions. [2021-11-19 14:05:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:05:12,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:12,769 INFO L225 Difference]: With dead ends: 468 [2021-11-19 14:05:12,769 INFO L226 Difference]: Without dead ends: 460 [2021-11-19 14:05:12,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:05:12,770 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:12,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:05:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-19 14:05:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 234. [2021-11-19 14:05:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.124463519313305) internal successors, (728), 233 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 728 transitions. [2021-11-19 14:05:12,781 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 728 transitions. Word has length 24 [2021-11-19 14:05:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:12,782 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 728 transitions. [2021-11-19 14:05:12,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 728 transitions. [2021-11-19 14:05:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:12,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:12,783 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:12,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:12,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:12,996 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:12,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:12,996 INFO L85 PathProgramCache]: Analyzing trace with hash 110001244, now seen corresponding path program 7 times [2021-11-19 14:05:12,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:12,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337285020] [2021-11-19 14:05:12,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:05:12,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:12,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:12,998 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:12,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:05:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:13,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:13,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:13,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:13,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337285020] [2021-11-19 14:05:13,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337285020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:13,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:13,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:05:13,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716704033] [2021-11-19 14:05:13,898 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:13,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:05:13,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:13,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:05:13,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:05:13,899 INFO L87 Difference]: Start difference. First operand 234 states and 728 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:14,635 INFO L93 Difference]: Finished difference Result 498 states and 1502 transitions. [2021-11-19 14:05:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:14,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:14,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:14,639 INFO L225 Difference]: With dead ends: 498 [2021-11-19 14:05:14,639 INFO L226 Difference]: Without dead ends: 498 [2021-11-19 14:05:14,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:05:14,640 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:14,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:05:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-19 14:05:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 240. [2021-11-19 14:05:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1548117154811717) internal successors, (754), 239 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 754 transitions. [2021-11-19 14:05:14,649 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 754 transitions. Word has length 24 [2021-11-19 14:05:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:14,649 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 754 transitions. [2021-11-19 14:05:14,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 754 transitions. [2021-11-19 14:05:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:14,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:14,650 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:14,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:14,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:14,851 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:14,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1246024996, now seen corresponding path program 8 times [2021-11-19 14:05:14,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:14,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59530978] [2021-11-19 14:05:14,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:05:14,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:14,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:14,853 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:14,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:05:15,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:05:15,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:15,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:15,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:15,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:15,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:15,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59530978] [2021-11-19 14:05:15,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59530978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:15,977 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:15,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:15,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974268512] [2021-11-19 14:05:15,977 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:15,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:15,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:15,978 INFO L87 Difference]: Start difference. First operand 240 states and 754 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:16,879 INFO L93 Difference]: Finished difference Result 504 states and 1513 transitions. [2021-11-19 14:05:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:16,884 INFO L225 Difference]: With dead ends: 504 [2021-11-19 14:05:16,884 INFO L226 Difference]: Without dead ends: 498 [2021-11-19 14:05:16,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:05:16,886 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:16,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:05:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-19 14:05:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 254. [2021-11-19 14:05:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.158102766798419) internal successors, (799), 253 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 799 transitions. [2021-11-19 14:05:16,899 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 799 transitions. Word has length 24 [2021-11-19 14:05:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:16,899 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 799 transitions. [2021-11-19 14:05:16,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 799 transitions. [2021-11-19 14:05:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:16,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:16,901 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:16,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-19 14:05:17,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:17,115 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1105358271, now seen corresponding path program 8 times [2021-11-19 14:05:17,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:17,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608437021] [2021-11-19 14:05:17,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:05:17,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:17,117 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:17,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:05:17,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:05:17,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:05:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:17,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:18,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:18,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608437021] [2021-11-19 14:05:18,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608437021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:18,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:18,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:18,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438360622] [2021-11-19 14:05:18,818 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:18,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:18,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:18,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:18,819 INFO L87 Difference]: Start difference. First operand 254 states and 799 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:20,766 INFO L93 Difference]: Finished difference Result 484 states and 1475 transitions. [2021-11-19 14:05:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:05:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:20,771 INFO L225 Difference]: With dead ends: 484 [2021-11-19 14:05:20,771 INFO L226 Difference]: Without dead ends: 480 [2021-11-19 14:05:20,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:05:20,772 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 125 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:20,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 0 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:05:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-19 14:05:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 262. [2021-11-19 14:05:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.1455938697318007) internal successors, (821), 261 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 821 transitions. [2021-11-19 14:05:20,786 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 821 transitions. Word has length 24 [2021-11-19 14:05:20,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:20,787 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 821 transitions. [2021-11-19 14:05:20,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 821 transitions. [2021-11-19 14:05:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:20,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:20,789 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:20,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 14:05:21,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:21,017 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:21,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:21,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1608033899, now seen corresponding path program 9 times [2021-11-19 14:05:21,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:21,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997169664] [2021-11-19 14:05:21,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:05:21,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:21,019 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:21,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:05:21,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:05:21,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:21,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:05:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:21,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:22,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:22,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997169664] [2021-11-19 14:05:22,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997169664] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:05:22,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:05:22,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:05:22,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123133573] [2021-11-19 14:05:22,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:22,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:05:22,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:05:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:22,906 INFO L87 Difference]: Start difference. First operand 262 states and 821 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) [2021-11-19 14:05:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:25,408 INFO L93 Difference]: Finished difference Result 594 states and 1693 transitions. [2021-11-19 14:05:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:05:25,409 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 24 [2021-11-19 14:05:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:25,414 INFO L225 Difference]: With dead ends: 594 [2021-11-19 14:05:25,414 INFO L226 Difference]: Without dead ends: 594 [2021-11-19 14:05:25,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:05:25,415 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:25,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:05:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-19 14:05:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 254. [2021-11-19 14:05:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.142292490118577) internal successors, (795), 253 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 795 transitions. [2021-11-19 14:05:25,431 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 795 transitions. Word has length 24 [2021-11-19 14:05:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:25,431 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 795 transitions. [2021-11-19 14:05:25,432 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) [2021-11-19 14:05:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 795 transitions. [2021-11-19 14:05:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:25,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:25,434 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:25,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:25,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:25,660 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:25,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1559537304, now seen corresponding path program 9 times [2021-11-19 14:05:25,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:25,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083647913] [2021-11-19 14:05:25,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:05:25,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:25,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:25,663 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:25,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:05:25,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:05:25,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:26,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:26,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:26,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083647913] [2021-11-19 14:05:26,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083647913] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:26,955 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:26,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:26,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492174035] [2021-11-19 14:05:26,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:26,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:26,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:26,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:26,957 INFO L87 Difference]: Start difference. First operand 254 states and 795 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:28,017 INFO L93 Difference]: Finished difference Result 518 states and 1559 transitions. [2021-11-19 14:05:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:28,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:28,022 INFO L225 Difference]: With dead ends: 518 [2021-11-19 14:05:28,022 INFO L226 Difference]: Without dead ends: 518 [2021-11-19 14:05:28,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:05:28,023 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:28,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:05:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-19 14:05:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 246. [2021-11-19 14:05:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.1551020408163266) internal successors, (773), 245 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 773 transitions. [2021-11-19 14:05:28,036 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 773 transitions. Word has length 24 [2021-11-19 14:05:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:28,037 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 773 transitions. [2021-11-19 14:05:28,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 773 transitions. [2021-11-19 14:05:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:28,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:28,039 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:28,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:28,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:28,252 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1661594281, now seen corresponding path program 10 times [2021-11-19 14:05:28,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:28,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294265444] [2021-11-19 14:05:28,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:05:28,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:28,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:28,254 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:28,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:05:28,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:05:28,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:05:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:28,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:29,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:29,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294265444] [2021-11-19 14:05:29,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294265444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:29,811 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:29,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:05:29,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572069037] [2021-11-19 14:05:29,812 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:29,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:05:29,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:29,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:05:29,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:05:29,814 INFO L87 Difference]: Start difference. First operand 246 states and 773 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:31,539 INFO L93 Difference]: Finished difference Result 440 states and 1339 transitions. [2021-11-19 14:05:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:05:31,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:31,544 INFO L225 Difference]: With dead ends: 440 [2021-11-19 14:05:31,545 INFO L226 Difference]: Without dead ends: 432 [2021-11-19 14:05:31,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:05:31,546 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:31,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:05:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-19 14:05:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 248. [2021-11-19 14:05:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.1497975708502026) internal successors, (778), 247 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 778 transitions. [2021-11-19 14:05:31,569 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 778 transitions. Word has length 24 [2021-11-19 14:05:31,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:31,569 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 778 transitions. [2021-11-19 14:05:31,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 778 transitions. [2021-11-19 14:05:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:31,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:31,571 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:31,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:31,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:31,787 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:31,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1115861375, now seen corresponding path program 11 times [2021-11-19 14:05:31,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:31,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127456292] [2021-11-19 14:05:31,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:05:31,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:31,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:31,790 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:31,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:05:31,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:05:31,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:31,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:05:31,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:32,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:33,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:33,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127456292] [2021-11-19 14:05:33,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127456292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:33,628 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:33,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:33,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445980819] [2021-11-19 14:05:33,629 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:33,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:33,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:33,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:33,631 INFO L87 Difference]: Start difference. First operand 248 states and 778 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:35,583 INFO L93 Difference]: Finished difference Result 428 states and 1328 transitions. [2021-11-19 14:05:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:05:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:35,588 INFO L225 Difference]: With dead ends: 428 [2021-11-19 14:05:35,588 INFO L226 Difference]: Without dead ends: 424 [2021-11-19 14:05:35,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:05:35,589 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:35,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:05:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-19 14:05:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 256. [2021-11-19 14:05:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.1333333333333333) internal successors, (799), 255 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 799 transitions. [2021-11-19 14:05:35,601 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 799 transitions. Word has length 24 [2021-11-19 14:05:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:35,601 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 799 transitions. [2021-11-19 14:05:35,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 799 transitions. [2021-11-19 14:05:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:35,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:35,604 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:35,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:35,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:35,819 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:35,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2478357, now seen corresponding path program 12 times [2021-11-19 14:05:35,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:35,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100780277] [2021-11-19 14:05:35,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:05:35,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:35,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:35,822 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:35,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:05:35,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:05:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:36,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:05:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:36,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:37,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:37,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100780277] [2021-11-19 14:05:37,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100780277] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:05:37,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:05:37,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:05:37,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220825421] [2021-11-19 14:05:37,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:37,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:05:37,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:05:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:37,481 INFO L87 Difference]: Start difference. First operand 256 states and 799 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) [2021-11-19 14:05:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:39,123 INFO L93 Difference]: Finished difference Result 548 states and 1589 transitions. [2021-11-19 14:05:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:05:39,124 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 24 [2021-11-19 14:05:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:39,128 INFO L225 Difference]: With dead ends: 548 [2021-11-19 14:05:39,128 INFO L226 Difference]: Without dead ends: 548 [2021-11-19 14:05:39,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:05:39,129 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:39,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:05:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-19 14:05:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 254. [2021-11-19 14:05:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.1343873517786562) internal successors, (793), 253 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 793 transitions. [2021-11-19 14:05:39,142 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 793 transitions. Word has length 24 [2021-11-19 14:05:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:39,142 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 793 transitions. [2021-11-19 14:05:39,142 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) [2021-11-19 14:05:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 793 transitions. [2021-11-19 14:05:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:39,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:39,143 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:39,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:39,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:39,344 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:39,344 INFO L85 PathProgramCache]: Analyzing trace with hash 697746566, now seen corresponding path program 10 times [2021-11-19 14:05:39,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:39,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104070599] [2021-11-19 14:05:39,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:05:39,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:39,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:39,345 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:39,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:05:39,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:05:39,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:39,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:39,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:39,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:40,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:40,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104070599] [2021-11-19 14:05:40,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104070599] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:05:40,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:05:40,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:05:40,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465156084] [2021-11-19 14:05:40,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:40,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:05:40,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:40,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:05:40,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:05:40,764 INFO L87 Difference]: Start difference. First operand 254 states and 793 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) [2021-11-19 14:05:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:42,103 INFO L93 Difference]: Finished difference Result 502 states and 1525 transitions. [2021-11-19 14:05:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:42,104 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 24 [2021-11-19 14:05:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:42,107 INFO L225 Difference]: With dead ends: 502 [2021-11-19 14:05:42,107 INFO L226 Difference]: Without dead ends: 502 [2021-11-19 14:05:42,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:05:42,108 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:42,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:05:42,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-19 14:05:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 242. [2021-11-19 14:05:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.132780082987552) internal successors, (755), 241 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:42,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 755 transitions. [2021-11-19 14:05:42,120 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 755 transitions. Word has length 24 [2021-11-19 14:05:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:42,121 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 755 transitions. [2021-11-19 14:05:42,121 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) [2021-11-19 14:05:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 755 transitions. [2021-11-19 14:05:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:42,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:42,122 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:42,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:42,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:42,335 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1073768544, now seen corresponding path program 11 times [2021-11-19 14:05:42,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:42,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30971235] [2021-11-19 14:05:42,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:05:42,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:42,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:42,337 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:42,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:05:42,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:05:42,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:42,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:42,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:42,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:43,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:43,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30971235] [2021-11-19 14:05:43,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30971235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:43,864 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:43,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:43,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341664385] [2021-11-19 14:05:43,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:43,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:43,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:43,865 INFO L87 Difference]: Start difference. First operand 242 states and 755 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:44,948 INFO L93 Difference]: Finished difference Result 486 states and 1491 transitions. [2021-11-19 14:05:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:44,952 INFO L225 Difference]: With dead ends: 486 [2021-11-19 14:05:44,952 INFO L226 Difference]: Without dead ends: 486 [2021-11-19 14:05:44,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:05:44,953 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:44,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:05:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-19 14:05:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 248. [2021-11-19 14:05:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.174089068825911) internal successors, (784), 247 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 784 transitions. [2021-11-19 14:05:44,965 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 784 transitions. Word has length 24 [2021-11-19 14:05:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:44,965 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 784 transitions. [2021-11-19 14:05:44,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 784 transitions. [2021-11-19 14:05:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:44,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:44,967 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:44,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-19 14:05:45,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:45,184 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:45,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:45,185 INFO L85 PathProgramCache]: Analyzing trace with hash -618410738, now seen corresponding path program 12 times [2021-11-19 14:05:45,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:45,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101132520] [2021-11-19 14:05:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:05:45,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:45,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:45,187 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:45,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:05:45,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:05:45,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:45,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:45,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:46,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:46,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101132520] [2021-11-19 14:05:46,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101132520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:46,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:46,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:46,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890416243] [2021-11-19 14:05:46,818 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:46,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:46,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:46,819 INFO L87 Difference]: Start difference. First operand 248 states and 784 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:47,812 INFO L93 Difference]: Finished difference Result 472 states and 1459 transitions. [2021-11-19 14:05:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:47,818 INFO L225 Difference]: With dead ends: 472 [2021-11-19 14:05:47,818 INFO L226 Difference]: Without dead ends: 472 [2021-11-19 14:05:47,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:05:47,819 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:47,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:05:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-19 14:05:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 248. [2021-11-19 14:05:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.174089068825911) internal successors, (784), 247 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 784 transitions. [2021-11-19 14:05:47,830 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 784 transitions. Word has length 24 [2021-11-19 14:05:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:47,830 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 784 transitions. [2021-11-19 14:05:47,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 784 transitions. [2021-11-19 14:05:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:47,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:47,832 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:47,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-19 14:05:48,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:48,036 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1702776216, now seen corresponding path program 13 times [2021-11-19 14:05:48,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:48,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335253768] [2021-11-19 14:05:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:05:48,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:48,038 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:05:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:48,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:48,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:49,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:49,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335253768] [2021-11-19 14:05:49,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335253768] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:49,650 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:49,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:49,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925857677] [2021-11-19 14:05:49,650 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:49,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:49,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:49,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:49,651 INFO L87 Difference]: Start difference. First operand 248 states and 784 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:50,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:50,609 INFO L93 Difference]: Finished difference Result 500 states and 1521 transitions. [2021-11-19 14:05:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:50,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:50,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:50,613 INFO L225 Difference]: With dead ends: 500 [2021-11-19 14:05:50,613 INFO L226 Difference]: Without dead ends: 494 [2021-11-19 14:05:50,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:05:50,614 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:50,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:05:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-19 14:05:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 262. [2021-11-19 14:05:50,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.1992337164750957) internal successors, (835), 261 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 835 transitions. [2021-11-19 14:05:50,622 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 835 transitions. Word has length 24 [2021-11-19 14:05:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:50,622 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 835 transitions. [2021-11-19 14:05:50,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 835 transitions. [2021-11-19 14:05:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:50,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:50,623 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:50,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:50,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:50,823 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1131321410, now seen corresponding path program 14 times [2021-11-19 14:05:50,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:50,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516778980] [2021-11-19 14:05:50,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:05:50,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:50,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:50,826 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:50,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:05:50,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:05:50,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:51,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:51,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:51,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:52,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:52,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516778980] [2021-11-19 14:05:52,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516778980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:52,451 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:52,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:52,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529357956] [2021-11-19 14:05:52,451 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:52,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:52,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:52,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:52,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:52,452 INFO L87 Difference]: Start difference. First operand 262 states and 835 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:53,402 INFO L93 Difference]: Finished difference Result 508 states and 1551 transitions. [2021-11-19 14:05:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:53,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:53,407 INFO L225 Difference]: With dead ends: 508 [2021-11-19 14:05:53,407 INFO L226 Difference]: Without dead ends: 508 [2021-11-19 14:05:53,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:05:53,408 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:53,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:05:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-19 14:05:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 262. [2021-11-19 14:05:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.1992337164750957) internal successors, (835), 261 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 835 transitions. [2021-11-19 14:05:53,417 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 835 transitions. Word has length 24 [2021-11-19 14:05:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:53,418 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 835 transitions. [2021-11-19 14:05:53,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:53,418 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 835 transitions. [2021-11-19 14:05:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:53,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:53,420 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:53,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:53,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:53,620 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash -983875898, now seen corresponding path program 15 times [2021-11-19 14:05:53,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:53,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770294257] [2021-11-19 14:05:53,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:05:53,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:53,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:53,622 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:53,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 14:05:53,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:05:53,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:53,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:05:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:54,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:55,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:55,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770294257] [2021-11-19 14:05:55,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770294257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:55,321 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:55,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:55,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200326411] [2021-11-19 14:05:55,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:55,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:55,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:55,322 INFO L87 Difference]: Start difference. First operand 262 states and 835 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:56,620 INFO L93 Difference]: Finished difference Result 502 states and 1524 transitions. [2021-11-19 14:05:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:56,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:05:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:56,625 INFO L225 Difference]: With dead ends: 502 [2021-11-19 14:05:56,625 INFO L226 Difference]: Without dead ends: 496 [2021-11-19 14:05:56,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:05:56,626 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:56,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:05:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-19 14:05:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 270. [2021-11-19 14:05:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2304832713754648) internal successors, (869), 269 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 869 transitions. [2021-11-19 14:05:56,639 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 869 transitions. Word has length 24 [2021-11-19 14:05:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:56,639 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 869 transitions. [2021-11-19 14:05:56,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 869 transitions. [2021-11-19 14:05:56,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:05:56,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:56,641 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:56,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:56,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:56,874 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:05:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:56,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1367507369, now seen corresponding path program 13 times [2021-11-19 14:05:56,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:56,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259619884] [2021-11-19 14:05:56,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:05:56,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:56,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:56,876 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:56,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 14:05:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:57,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:05:57,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:05:58,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:58,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259619884] [2021-11-19 14:05:58,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259619884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:58,860 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:58,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:05:58,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372344988] [2021-11-19 14:05:58,860 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:58,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:05:58,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:05:58,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:58,861 INFO L87 Difference]: Start difference. First operand 270 states and 869 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:01,858 INFO L93 Difference]: Finished difference Result 516 states and 1592 transitions. [2021-11-19 14:06:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:06:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:01,862 INFO L225 Difference]: With dead ends: 516 [2021-11-19 14:06:01,862 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 14:06:01,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:06:01,863 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 118 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:01,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 0 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 14:06:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 14:06:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 280. [2021-11-19 14:06:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.240143369175627) internal successors, (904), 279 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 904 transitions. [2021-11-19 14:06:01,873 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 904 transitions. Word has length 24 [2021-11-19 14:06:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:01,873 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 904 transitions. [2021-11-19 14:06:01,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 904 transitions. [2021-11-19 14:06:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:01,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:01,874 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:01,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:02,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:02,075 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:02,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1345884801, now seen corresponding path program 14 times [2021-11-19 14:06:02,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:02,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765189555] [2021-11-19 14:06:02,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:06:02,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:02,078 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:02,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 14:06:02,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:06:02,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:02,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:06:02,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:02,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:04,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:04,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765189555] [2021-11-19 14:06:04,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765189555] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:06:04,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:06:04,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:06:04,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32247262] [2021-11-19 14:06:04,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:04,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:06:04,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:06:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:04,183 INFO L87 Difference]: Start difference. First operand 280 states and 904 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) [2021-11-19 14:06:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:06,577 INFO L93 Difference]: Finished difference Result 580 states and 1728 transitions. [2021-11-19 14:06:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:06:06,579 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 24 [2021-11-19 14:06:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:06,583 INFO L225 Difference]: With dead ends: 580 [2021-11-19 14:06:06,583 INFO L226 Difference]: Without dead ends: 580 [2021-11-19 14:06:06,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:06:06,584 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:06,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:06:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-19 14:06:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 280. [2021-11-19 14:06:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.240143369175627) internal successors, (904), 279 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 904 transitions. [2021-11-19 14:06:06,595 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 904 transitions. Word has length 24 [2021-11-19 14:06:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:06,595 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 904 transitions. [2021-11-19 14:06:06,596 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) [2021-11-19 14:06:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 904 transitions. [2021-11-19 14:06:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:06,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:06,597 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:06,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:06,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:06,797 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1821686402, now seen corresponding path program 16 times [2021-11-19 14:06:06,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:06,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190917793] [2021-11-19 14:06:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:06:06,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:06,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:06,799 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:06,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 14:06:06,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:06:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:06,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:06:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:07,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:08,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:08,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190917793] [2021-11-19 14:06:08,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190917793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:08,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:08,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:06:08,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776175967] [2021-11-19 14:06:08,399 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:08,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:06:08,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:08,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:06:08,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:08,401 INFO L87 Difference]: Start difference. First operand 280 states and 904 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:09,716 INFO L93 Difference]: Finished difference Result 508 states and 1576 transitions. [2021-11-19 14:06:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:09,717 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:09,722 INFO L225 Difference]: With dead ends: 508 [2021-11-19 14:06:09,723 INFO L226 Difference]: Without dead ends: 508 [2021-11-19 14:06:09,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:06:09,724 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:09,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:06:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-19 14:06:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 276. [2021-11-19 14:06:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.247272727272727) internal successors, (893), 275 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 893 transitions. [2021-11-19 14:06:09,739 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 893 transitions. Word has length 24 [2021-11-19 14:06:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:09,740 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 893 transitions. [2021-11-19 14:06:09,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 893 transitions. [2021-11-19 14:06:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:09,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:09,742 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:09,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:09,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:09,948 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1316518969, now seen corresponding path program 15 times [2021-11-19 14:06:09,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:09,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033557515] [2021-11-19 14:06:09,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:06:09,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:09,950 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:09,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-19 14:06:10,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:06:10,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:10,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:06:10,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:10,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:12,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:12,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033557515] [2021-11-19 14:06:12,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033557515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:12,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:12,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:06:12,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020539316] [2021-11-19 14:06:12,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:12,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:06:12,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:06:12,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:12,033 INFO L87 Difference]: Start difference. First operand 276 states and 893 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:15,263 INFO L93 Difference]: Finished difference Result 508 states and 1566 transitions. [2021-11-19 14:06:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:06:15,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:15,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:15,269 INFO L225 Difference]: With dead ends: 508 [2021-11-19 14:06:15,269 INFO L226 Difference]: Without dead ends: 504 [2021-11-19 14:06:15,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:06:15,270 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:15,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 14:06:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-19 14:06:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 280. [2021-11-19 14:06:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.25089605734767) internal successors, (907), 279 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) [2021-11-19 14:06:15,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 907 transitions. [2021-11-19 14:06:15,285 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 907 transitions. Word has length 24 [2021-11-19 14:06:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:15,286 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 907 transitions. [2021-11-19 14:06:15,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 907 transitions. [2021-11-19 14:06:15,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:15,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:15,288 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:15,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:15,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:15,504 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1865065309, now seen corresponding path program 16 times [2021-11-19 14:06:15,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:15,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797293337] [2021-11-19 14:06:15,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:06:15,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:15,506 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:15,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:06:15,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:06:15,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:15,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:06:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:16,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:17,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:17,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797293337] [2021-11-19 14:06:17,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797293337] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:06:17,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:06:17,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:06:17,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121554742] [2021-11-19 14:06:17,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:17,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:06:17,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:06:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:17,652 INFO L87 Difference]: Start difference. First operand 280 states and 907 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) [2021-11-19 14:06:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:19,797 INFO L93 Difference]: Finished difference Result 588 states and 1742 transitions. [2021-11-19 14:06:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:06:19,798 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 24 [2021-11-19 14:06:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:19,800 INFO L225 Difference]: With dead ends: 588 [2021-11-19 14:06:19,800 INFO L226 Difference]: Without dead ends: 588 [2021-11-19 14:06:19,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:06:19,807 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:19,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:06:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-19 14:06:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 278. [2021-11-19 14:06:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.256317689530686) internal successors, (902), 277 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 902 transitions. [2021-11-19 14:06:19,820 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 902 transitions. Word has length 24 [2021-11-19 14:06:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:19,821 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 902 transitions. [2021-11-19 14:06:19,821 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) [2021-11-19 14:06:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 902 transitions. [2021-11-19 14:06:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:19,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:19,822 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:19,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-19 14:06:20,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:20,022 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1501019991, now seen corresponding path program 17 times [2021-11-19 14:06:20,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:20,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874527236] [2021-11-19 14:06:20,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:06:20,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:20,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:20,024 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:20,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 14:06:20,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:06:20,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:20,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:06:20,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:20,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:22,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:22,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874527236] [2021-11-19 14:06:22,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874527236] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:06:22,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:06:22,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:06:22,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890508111] [2021-11-19 14:06:22,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:22,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:06:22,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:22,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:06:22,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:22,307 INFO L87 Difference]: Start difference. First operand 278 states and 902 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) [2021-11-19 14:06:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:24,593 INFO L93 Difference]: Finished difference Result 626 states and 1817 transitions. [2021-11-19 14:06:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:06:24,594 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 24 [2021-11-19 14:06:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:24,596 INFO L225 Difference]: With dead ends: 626 [2021-11-19 14:06:24,596 INFO L226 Difference]: Without dead ends: 626 [2021-11-19 14:06:24,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:06:24,597 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:24,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:06:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-19 14:06:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 276. [2021-11-19 14:06:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.2436363636363637) internal successors, (892), 275 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 892 transitions. [2021-11-19 14:06:24,608 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 892 transitions. Word has length 24 [2021-11-19 14:06:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:24,608 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 892 transitions. [2021-11-19 14:06:24,608 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) [2021-11-19 14:06:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 892 transitions. [2021-11-19 14:06:24,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:24,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:24,610 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:24,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:24,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:24,826 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:24,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:24,826 INFO L85 PathProgramCache]: Analyzing trace with hash -645713337, now seen corresponding path program 18 times [2021-11-19 14:06:24,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:24,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68554601] [2021-11-19 14:06:24,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:06:24,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:24,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:24,828 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:24,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 14:06:25,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:06:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:25,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:06:25,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:26,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:27,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:27,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68554601] [2021-11-19 14:06:27,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68554601] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:06:27,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:06:27,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:06:27,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334269021] [2021-11-19 14:06:27,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:27,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:06:27,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:06:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:27,408 INFO L87 Difference]: Start difference. First operand 276 states and 892 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) [2021-11-19 14:06:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:29,605 INFO L93 Difference]: Finished difference Result 598 states and 1757 transitions. [2021-11-19 14:06:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:06:29,606 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 24 [2021-11-19 14:06:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:29,608 INFO L225 Difference]: With dead ends: 598 [2021-11-19 14:06:29,608 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 14:06:29,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:06:29,609 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:29,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:06:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 14:06:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 270. [2021-11-19 14:06:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2565055762081783) internal successors, (876), 269 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 876 transitions. [2021-11-19 14:06:29,621 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 876 transitions. Word has length 24 [2021-11-19 14:06:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:29,621 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 876 transitions. [2021-11-19 14:06:29,622 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) [2021-11-19 14:06:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 876 transitions. [2021-11-19 14:06:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:29,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:29,623 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:29,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:29,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:29,832 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2090560506, now seen corresponding path program 17 times [2021-11-19 14:06:29,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:29,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733457248] [2021-11-19 14:06:29,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:06:29,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:29,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:29,835 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:29,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 14:06:29,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:06:29,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:29,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:06:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:30,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:31,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:31,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733457248] [2021-11-19 14:06:31,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733457248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:31,699 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:31,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:06:31,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89531957] [2021-11-19 14:06:31,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:31,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:06:31,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:31,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:06:31,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:31,701 INFO L87 Difference]: Start difference. First operand 270 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:32,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:32,915 INFO L93 Difference]: Finished difference Result 492 states and 1535 transitions. [2021-11-19 14:06:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:32,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:32,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:32,918 INFO L225 Difference]: With dead ends: 492 [2021-11-19 14:06:32,918 INFO L226 Difference]: Without dead ends: 492 [2021-11-19 14:06:32,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:06:32,919 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:32,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:06:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-19 14:06:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 270. [2021-11-19 14:06:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2565055762081783) internal successors, (876), 269 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 876 transitions. [2021-11-19 14:06:32,933 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 876 transitions. Word has length 24 [2021-11-19 14:06:32,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:32,933 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 876 transitions. [2021-11-19 14:06:32,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 876 transitions. [2021-11-19 14:06:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:32,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:32,935 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:32,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:33,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:33,148 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1286456600, now seen corresponding path program 18 times [2021-11-19 14:06:33,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:33,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870447881] [2021-11-19 14:06:33,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:06:33,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:33,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:33,150 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:33,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 14:06:33,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:06:33,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:33,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:06:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:33,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:34,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:34,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870447881] [2021-11-19 14:06:34,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870447881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:34,936 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:34,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:06:34,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458187515] [2021-11-19 14:06:34,936 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:34,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:06:34,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:34,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:06:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:34,937 INFO L87 Difference]: Start difference. First operand 270 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:36,184 INFO L93 Difference]: Finished difference Result 478 states and 1511 transitions. [2021-11-19 14:06:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:36,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:36,186 INFO L225 Difference]: With dead ends: 478 [2021-11-19 14:06:36,187 INFO L226 Difference]: Without dead ends: 478 [2021-11-19 14:06:36,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:06:36,187 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:36,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:06:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-19 14:06:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 256. [2021-11-19 14:06:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.231372549019608) internal successors, (824), 255 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 824 transitions. [2021-11-19 14:06:36,198 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 824 transitions. Word has length 24 [2021-11-19 14:06:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:36,198 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 824 transitions. [2021-11-19 14:06:36,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 824 transitions. [2021-11-19 14:06:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:36,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:36,200 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:36,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:36,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:36,408 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:36,409 INFO L85 PathProgramCache]: Analyzing trace with hash 272201952, now seen corresponding path program 19 times [2021-11-19 14:06:36,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:36,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669919425] [2021-11-19 14:06:36,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:06:36,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:36,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:36,410 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:36,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-19 14:06:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:36,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:06:36,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:37,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:37,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:37,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669919425] [2021-11-19 14:06:37,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669919425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:37,811 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:37,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:06:37,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730713674] [2021-11-19 14:06:37,811 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:37,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:06:37,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:37,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:06:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:06:37,812 INFO L87 Difference]: Start difference. First operand 256 states and 824 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:38,969 INFO L93 Difference]: Finished difference Result 482 states and 1472 transitions. [2021-11-19 14:06:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:38,971 INFO L225 Difference]: With dead ends: 482 [2021-11-19 14:06:38,971 INFO L226 Difference]: Without dead ends: 468 [2021-11-19 14:06:38,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:06:38,972 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:38,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:06:38,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-19 14:06:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 264. [2021-11-19 14:06:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.247148288973384) internal successors, (854), 263 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 854 transitions. [2021-11-19 14:06:38,982 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 854 transitions. Word has length 24 [2021-11-19 14:06:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:38,982 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 854 transitions. [2021-11-19 14:06:38,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 854 transitions. [2021-11-19 14:06:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:38,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:38,983 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:38,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:39,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:39,184 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:39,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:39,184 INFO L85 PathProgramCache]: Analyzing trace with hash -832392740, now seen corresponding path program 20 times [2021-11-19 14:06:39,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:39,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823556331] [2021-11-19 14:06:39,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:06:39,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:39,186 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:39,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-19 14:06:39,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:06:39,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:39,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:06:39,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:39,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:40,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:40,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823556331] [2021-11-19 14:06:40,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823556331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:40,741 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:40,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:06:40,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153966858] [2021-11-19 14:06:40,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:40,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:06:40,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:06:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:40,743 INFO L87 Difference]: Start difference. First operand 264 states and 854 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:41,901 INFO L93 Difference]: Finished difference Result 494 states and 1494 transitions. [2021-11-19 14:06:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:41,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:41,904 INFO L225 Difference]: With dead ends: 494 [2021-11-19 14:06:41,904 INFO L226 Difference]: Without dead ends: 488 [2021-11-19 14:06:41,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:06:41,905 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:41,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:06:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-19 14:06:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 274. [2021-11-19 14:06:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.21978021978022) internal successors, (879), 273 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 879 transitions. [2021-11-19 14:06:41,915 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 879 transitions. Word has length 24 [2021-11-19 14:06:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:41,915 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 879 transitions. [2021-11-19 14:06:41,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 879 transitions. [2021-11-19 14:06:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:41,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:41,917 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:41,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-11-19 14:06:42,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:42,142 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1403847546, now seen corresponding path program 21 times [2021-11-19 14:06:42,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:42,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733668655] [2021-11-19 14:06:42,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:06:42,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:42,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:42,144 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:42,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-19 14:06:42,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:06:42,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:06:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:42,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:43,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:43,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733668655] [2021-11-19 14:06:43,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733668655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:43,708 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:43,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:06:43,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518124060] [2021-11-19 14:06:43,708 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:43,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:06:43,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:06:43,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:43,709 INFO L87 Difference]: Start difference. First operand 274 states and 879 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:44,646 INFO L93 Difference]: Finished difference Result 474 states and 1465 transitions. [2021-11-19 14:06:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:44,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:44,648 INFO L225 Difference]: With dead ends: 474 [2021-11-19 14:06:44,648 INFO L226 Difference]: Without dead ends: 474 [2021-11-19 14:06:44,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:06:44,649 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:44,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:06:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-19 14:06:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 264. [2021-11-19 14:06:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.247148288973384) internal successors, (854), 263 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 854 transitions. [2021-11-19 14:06:44,659 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 854 transitions. Word has length 24 [2021-11-19 14:06:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:44,659 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 854 transitions. [2021-11-19 14:06:44,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 854 transitions. [2021-11-19 14:06:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:44,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:44,660 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:44,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:44,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:44,872 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1409634958, now seen corresponding path program 22 times [2021-11-19 14:06:44,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:44,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872381634] [2021-11-19 14:06:44,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:06:44,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:44,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:44,874 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:44,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-19 14:06:44,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:06:44,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:44,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:06:44,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:45,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:46,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:46,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872381634] [2021-11-19 14:06:46,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872381634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:46,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:46,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:06:46,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785532911] [2021-11-19 14:06:46,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:46,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:06:46,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:06:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:06:46,214 INFO L87 Difference]: Start difference. First operand 264 states and 854 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:47,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:47,192 INFO L93 Difference]: Finished difference Result 518 states and 1572 transitions. [2021-11-19 14:06:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:47,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:47,194 INFO L225 Difference]: With dead ends: 518 [2021-11-19 14:06:47,194 INFO L226 Difference]: Without dead ends: 504 [2021-11-19 14:06:47,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:06:47,195 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:47,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:06:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-19 14:06:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 270. [2021-11-19 14:06:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2304832713754648) internal successors, (869), 269 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 869 transitions. [2021-11-19 14:06:47,205 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 869 transitions. Word has length 24 [2021-11-19 14:06:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:47,205 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 869 transitions. [2021-11-19 14:06:47,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 869 transitions. [2021-11-19 14:06:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:47,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:47,206 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:47,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:47,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:47,407 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash -905914468, now seen corresponding path program 23 times [2021-11-19 14:06:47,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:47,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464756539] [2021-11-19 14:06:47,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:06:47,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:47,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:47,409 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:47,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-19 14:06:47,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:06:47,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:06:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:48,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:48,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:48,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464756539] [2021-11-19 14:06:48,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464756539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:48,774 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:48,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:06:48,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297326486] [2021-11-19 14:06:48,775 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:48,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:06:48,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:06:48,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:48,776 INFO L87 Difference]: Start difference. First operand 270 states and 869 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:49,971 INFO L93 Difference]: Finished difference Result 520 states and 1592 transitions. [2021-11-19 14:06:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:49,974 INFO L225 Difference]: With dead ends: 520 [2021-11-19 14:06:49,974 INFO L226 Difference]: Without dead ends: 514 [2021-11-19 14:06:49,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:06:49,974 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:49,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:06:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-19 14:06:49,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 284. [2021-11-19 14:06:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.2296819787985864) internal successors, (914), 283 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 914 transitions. [2021-11-19 14:06:49,984 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 914 transitions. Word has length 24 [2021-11-19 14:06:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:49,985 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 914 transitions. [2021-11-19 14:06:49,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 914 transitions. [2021-11-19 14:06:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:49,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:49,987 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:50,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:50,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:50,200 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:50,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1445468799, now seen corresponding path program 19 times [2021-11-19 14:06:50,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:50,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440071599] [2021-11-19 14:06:50,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:06:50,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:50,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:50,202 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:50,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-19 14:06:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:06:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:50,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:51,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:51,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440071599] [2021-11-19 14:06:51,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440071599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:51,791 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:51,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:06:51,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291490829] [2021-11-19 14:06:51,791 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:06:51,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:06:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:51,792 INFO L87 Difference]: Start difference. First operand 284 states and 914 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:53,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:53,888 INFO L93 Difference]: Finished difference Result 582 states and 1808 transitions. [2021-11-19 14:06:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:06:53,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:06:53,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:53,891 INFO L225 Difference]: With dead ends: 582 [2021-11-19 14:06:53,891 INFO L226 Difference]: Without dead ends: 578 [2021-11-19 14:06:53,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:06:53,892 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 157 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:53,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 0 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:06:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-19 14:06:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 302. [2021-11-19 14:06:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.249169435215947) internal successors, (978), 301 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 978 transitions. [2021-11-19 14:06:53,902 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 978 transitions. Word has length 24 [2021-11-19 14:06:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:53,903 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 978 transitions. [2021-11-19 14:06:53,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 978 transitions. [2021-11-19 14:06:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:53,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:53,905 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:53,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-11-19 14:06:54,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:54,112 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1267923371, now seen corresponding path program 20 times [2021-11-19 14:06:54,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:54,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427669101] [2021-11-19 14:06:54,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:06:54,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:54,114 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:54,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-19 14:06:54,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:06:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:54,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:06:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:54,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:55,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:55,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427669101] [2021-11-19 14:06:55,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427669101] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:06:55,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:06:55,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:06:55,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398072438] [2021-11-19 14:06:55,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:55,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:06:55,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:06:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:55,732 INFO L87 Difference]: Start difference. First operand 302 states and 978 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) [2021-11-19 14:06:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:57,560 INFO L93 Difference]: Finished difference Result 526 states and 1665 transitions. [2021-11-19 14:06:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:06:57,561 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 24 [2021-11-19 14:06:57,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:57,564 INFO L225 Difference]: With dead ends: 526 [2021-11-19 14:06:57,564 INFO L226 Difference]: Without dead ends: 526 [2021-11-19 14:06:57,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:06:57,565 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:57,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:06:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-19 14:06:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 302. [2021-11-19 14:06:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.249169435215947) internal successors, (978), 301 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 978 transitions. [2021-11-19 14:06:57,576 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 978 transitions. Word has length 24 [2021-11-19 14:06:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:57,576 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 978 transitions. [2021-11-19 14:06:57,576 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) [2021-11-19 14:06:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 978 transitions. [2021-11-19 14:06:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:06:57,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:57,578 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:57,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:57,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:57,778 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:06:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1899647832, now seen corresponding path program 24 times [2021-11-19 14:06:57,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:57,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441920784] [2021-11-19 14:06:57,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:06:57,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:57,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:57,781 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:57,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-19 14:06:57,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:06:57,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:57,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:06:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:58,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:06:59,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:59,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441920784] [2021-11-19 14:06:59,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441920784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:59,332 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:59,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:06:59,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961772017] [2021-11-19 14:06:59,332 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:59,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:06:59,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:59,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:06:59,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:59,333 INFO L87 Difference]: Start difference. First operand 302 states and 978 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:00,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:00,699 INFO L93 Difference]: Finished difference Result 514 states and 1614 transitions. [2021-11-19 14:07:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:07:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:07:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:00,702 INFO L225 Difference]: With dead ends: 514 [2021-11-19 14:07:00,702 INFO L226 Difference]: Without dead ends: 514 [2021-11-19 14:07:00,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:07:00,703 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:00,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:07:00,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-19 14:07:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 288. [2021-11-19 14:07:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.264808362369338) internal successors, (937), 287 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 937 transitions. [2021-11-19 14:07:00,712 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 937 transitions. Word has length 24 [2021-11-19 14:07:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:00,712 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 937 transitions. [2021-11-19 14:07:00,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 937 transitions. [2021-11-19 14:07:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:00,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:00,714 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:00,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:00,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:00,914 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:00,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:00,915 INFO L85 PathProgramCache]: Analyzing trace with hash 964094207, now seen corresponding path program 21 times [2021-11-19 14:07:00,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:00,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480258442] [2021-11-19 14:07:00,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:07:00,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:00,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:00,916 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:00,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-19 14:07:01,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:07:01,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:01,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:01,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:01,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:02,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:02,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480258442] [2021-11-19 14:07:02,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480258442] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:07:02,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:07:02,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:07:02,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821206908] [2021-11-19 14:07:02,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:02,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:07:02,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:02,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:07:02,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:07:02,107 INFO L87 Difference]: Start difference. First operand 288 states and 937 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) [2021-11-19 14:07:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:03,721 INFO L93 Difference]: Finished difference Result 524 states and 1668 transitions. [2021-11-19 14:07:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:07:03,722 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 24 [2021-11-19 14:07:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:03,724 INFO L225 Difference]: With dead ends: 524 [2021-11-19 14:07:03,724 INFO L226 Difference]: Without dead ends: 524 [2021-11-19 14:07:03,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:07:03,724 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:03,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:07:03,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-19 14:07:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 282. [2021-11-19 14:07:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.281138790035587) internal successors, (922), 281 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 922 transitions. [2021-11-19 14:07:03,736 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 922 transitions. Word has length 24 [2021-11-19 14:07:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:03,736 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 922 transitions. [2021-11-19 14:07:03,737 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) [2021-11-19 14:07:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 922 transitions. [2021-11-19 14:07:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:03,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:03,738 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:03,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-11-19 14:07:03,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:03,944 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:03,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1898040562, now seen corresponding path program 25 times [2021-11-19 14:07:03,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:03,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58881960] [2021-11-19 14:07:03,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:07:03,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:03,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:03,946 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:03,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-19 14:07:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:04,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:07:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:04,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:05,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:05,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58881960] [2021-11-19 14:07:05,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58881960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:05,730 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:05,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:07:05,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353461483] [2021-11-19 14:07:05,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:05,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:07:05,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:05,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:07:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:05,730 INFO L87 Difference]: Start difference. First operand 282 states and 922 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:06,880 INFO L93 Difference]: Finished difference Result 536 states and 1667 transitions. [2021-11-19 14:07:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:07:06,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:07:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:06,882 INFO L225 Difference]: With dead ends: 536 [2021-11-19 14:07:06,882 INFO L226 Difference]: Without dead ends: 530 [2021-11-19 14:07:06,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:07:06,883 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:06,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:07:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-19 14:07:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 296. [2021-11-19 14:07:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.298305084745763) internal successors, (973), 295 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 973 transitions. [2021-11-19 14:07:06,898 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 973 transitions. Word has length 24 [2021-11-19 14:07:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:06,898 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 973 transitions. [2021-11-19 14:07:06,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 973 transitions. [2021-11-19 14:07:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:06,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:06,900 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:06,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-19 14:07:07,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:07,122 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:07,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1326585756, now seen corresponding path program 26 times [2021-11-19 14:07:07,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:07,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213767740] [2021-11-19 14:07:07,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:07:07,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:07,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:07,123 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:07,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-19 14:07:07,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:07:07,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:07,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:07:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:07,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:09,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:09,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213767740] [2021-11-19 14:07:09,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213767740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:09,017 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:09,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:07:09,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927577539] [2021-11-19 14:07:09,017 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:07:09,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:07:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:09,018 INFO L87 Difference]: Start difference. First operand 296 states and 973 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:10,064 INFO L93 Difference]: Finished difference Result 540 states and 1687 transitions. [2021-11-19 14:07:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:07:10,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:07:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:10,066 INFO L225 Difference]: With dead ends: 540 [2021-11-19 14:07:10,067 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 14:07:10,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:07:10,067 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:10,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:07:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 14:07:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 294. [2021-11-19 14:07:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.303754266211604) internal successors, (968), 293 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 968 transitions. [2021-11-19 14:07:10,075 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 968 transitions. Word has length 24 [2021-11-19 14:07:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:10,075 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 968 transitions. [2021-11-19 14:07:10,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 968 transitions. [2021-11-19 14:07:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:10,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:10,076 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:10,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:10,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:10,277 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:10,277 INFO L85 PathProgramCache]: Analyzing trace with hash -788611552, now seen corresponding path program 27 times [2021-11-19 14:07:10,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:10,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069344921] [2021-11-19 14:07:10,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:07:10,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:10,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:10,278 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:10,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-19 14:07:10,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:07:10,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:10,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:07:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:10,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:11,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:11,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069344921] [2021-11-19 14:07:11,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069344921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:11,846 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:11,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:07:11,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45750722] [2021-11-19 14:07:11,846 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:11,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:07:11,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:11,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:07:11,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:11,847 INFO L87 Difference]: Start difference. First operand 294 states and 968 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:13,222 INFO L93 Difference]: Finished difference Result 532 states and 1650 transitions. [2021-11-19 14:07:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:07:13,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:07:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:13,226 INFO L225 Difference]: With dead ends: 532 [2021-11-19 14:07:13,226 INFO L226 Difference]: Without dead ends: 526 [2021-11-19 14:07:13,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:07:13,227 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:13,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:07:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-19 14:07:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 302. [2021-11-19 14:07:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.3289036544850497) internal successors, (1002), 301 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1002 transitions. [2021-11-19 14:07:13,242 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1002 transitions. Word has length 24 [2021-11-19 14:07:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:13,243 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1002 transitions. [2021-11-19 14:07:13,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1002 transitions. [2021-11-19 14:07:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:13,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:13,245 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:13,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:13,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:13,461 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:13,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:13,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1562771715, now seen corresponding path program 22 times [2021-11-19 14:07:13,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:13,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797981686] [2021-11-19 14:07:13,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:07:13,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:13,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:13,464 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:13,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-19 14:07:13,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:07:13,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:13,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:14,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:15,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:15,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797981686] [2021-11-19 14:07:15,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797981686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:15,583 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:15,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:07:15,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934514460] [2021-11-19 14:07:15,583 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:15,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:07:15,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:15,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:07:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:15,584 INFO L87 Difference]: Start difference. First operand 302 states and 1002 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:18,154 INFO L93 Difference]: Finished difference Result 558 states and 1770 transitions. [2021-11-19 14:07:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:07:18,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:07:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:18,158 INFO L225 Difference]: With dead ends: 558 [2021-11-19 14:07:18,158 INFO L226 Difference]: Without dead ends: 554 [2021-11-19 14:07:18,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:07:18,159 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 166 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:18,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 0 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:07:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-19 14:07:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2021-11-19 14:07:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.3550488599348536) internal successors, (1030), 307 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1030 transitions. [2021-11-19 14:07:18,174 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1030 transitions. Word has length 24 [2021-11-19 14:07:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:18,175 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 1030 transitions. [2021-11-19 14:07:18,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1030 transitions. [2021-11-19 14:07:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:18,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:18,177 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:18,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:18,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:18,405 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1150620455, now seen corresponding path program 23 times [2021-11-19 14:07:18,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:18,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632981459] [2021-11-19 14:07:18,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:07:18,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:18,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:18,407 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:18,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-19 14:07:18,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:07:18,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:18,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:18,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:19,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:20,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:20,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632981459] [2021-11-19 14:07:20,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632981459] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:07:20,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:07:20,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:07:20,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416138464] [2021-11-19 14:07:20,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:20,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:07:20,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:07:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:20,151 INFO L87 Difference]: Start difference. First operand 308 states and 1030 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) [2021-11-19 14:07:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:22,533 INFO L93 Difference]: Finished difference Result 752 states and 2165 transitions. [2021-11-19 14:07:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:07:22,534 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 24 [2021-11-19 14:07:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:22,536 INFO L225 Difference]: With dead ends: 752 [2021-11-19 14:07:22,536 INFO L226 Difference]: Without dead ends: 752 [2021-11-19 14:07:22,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:07:22,536 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 177 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:22,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 0 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:07:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-11-19 14:07:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 304. [2021-11-19 14:07:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.3366336633663365) internal successors, (1011), 303 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1011 transitions. [2021-11-19 14:07:22,547 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1011 transitions. Word has length 24 [2021-11-19 14:07:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:22,547 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1011 transitions. [2021-11-19 14:07:22,548 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) [2021-11-19 14:07:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1011 transitions. [2021-11-19 14:07:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:22,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:22,549 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:22,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:22,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:22,749 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2016950748, now seen corresponding path program 28 times [2021-11-19 14:07:22,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:22,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868330704] [2021-11-19 14:07:22,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:07:22,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:22,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:22,751 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:22,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-19 14:07:22,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:07:22,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:22,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:07:22,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:23,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:24,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:24,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868330704] [2021-11-19 14:07:24,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868330704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:24,400 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:24,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:07:24,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037581400] [2021-11-19 14:07:24,400 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:24,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:07:24,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:07:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:24,401 INFO L87 Difference]: Start difference. First operand 304 states and 1011 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:25,834 INFO L93 Difference]: Finished difference Result 522 states and 1654 transitions. [2021-11-19 14:07:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:07:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:07:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:25,836 INFO L225 Difference]: With dead ends: 522 [2021-11-19 14:07:25,836 INFO L226 Difference]: Without dead ends: 522 [2021-11-19 14:07:25,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:07:25,837 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:25,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:07:25,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-19 14:07:25,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 300. [2021-11-19 14:07:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.3444816053511706) internal successors, (1000), 299 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 1000 transitions. [2021-11-19 14:07:25,847 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 1000 transitions. Word has length 24 [2021-11-19 14:07:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:25,847 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 1000 transitions. [2021-11-19 14:07:25,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:25,847 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 1000 transitions. [2021-11-19 14:07:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:25,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:25,848 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:25,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:26,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:26,049 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1121254623, now seen corresponding path program 24 times [2021-11-19 14:07:26,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:26,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973903272] [2021-11-19 14:07:26,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:07:26,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:26,051 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:26,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-19 14:07:26,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:07:26,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:26,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:26,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:27,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:27,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973903272] [2021-11-19 14:07:27,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973903272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:27,755 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:27,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:07:27,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107259211] [2021-11-19 14:07:27,755 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:27,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:07:27,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:27,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:07:27,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:27,756 INFO L87 Difference]: Start difference. First operand 300 states and 1000 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:29,906 INFO L93 Difference]: Finished difference Result 568 states and 1764 transitions. [2021-11-19 14:07:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:07:29,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:07:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:29,910 INFO L225 Difference]: With dead ends: 568 [2021-11-19 14:07:29,910 INFO L226 Difference]: Without dead ends: 564 [2021-11-19 14:07:29,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:07:29,911 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:29,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:07:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-19 14:07:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 304. [2021-11-19 14:07:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.3465346534653464) internal successors, (1014), 303 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1014 transitions. [2021-11-19 14:07:29,924 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1014 transitions. Word has length 24 [2021-11-19 14:07:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:29,924 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1014 transitions. [2021-11-19 14:07:29,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1014 transitions. [2021-11-19 14:07:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:29,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:29,926 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:29,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:30,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:30,139 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2060329655, now seen corresponding path program 25 times [2021-11-19 14:07:30,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:30,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762979394] [2021-11-19 14:07:30,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:07:30,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:30,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:30,142 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:30,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-19 14:07:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:30,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:31,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:31,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762979394] [2021-11-19 14:07:31,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762979394] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:07:31,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:07:31,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:07:31,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075540691] [2021-11-19 14:07:31,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:31,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:07:31,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:07:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:31,981 INFO L87 Difference]: Start difference. First operand 304 states and 1014 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) [2021-11-19 14:07:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:33,301 INFO L93 Difference]: Finished difference Result 558 states and 1734 transitions. [2021-11-19 14:07:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:07:33,301 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 24 [2021-11-19 14:07:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:33,303 INFO L225 Difference]: With dead ends: 558 [2021-11-19 14:07:33,303 INFO L226 Difference]: Without dead ends: 558 [2021-11-19 14:07:33,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:07:33,303 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:33,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:07:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-19 14:07:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2021-11-19 14:07:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.352159468438538) internal successors, (1009), 301 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1009 transitions. [2021-11-19 14:07:33,311 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1009 transitions. Word has length 24 [2021-11-19 14:07:33,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:33,311 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1009 transitions. [2021-11-19 14:07:33,311 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) [2021-11-19 14:07:33,311 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1009 transitions. [2021-11-19 14:07:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:33,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:33,312 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:33,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:33,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:33,513 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1305755645, now seen corresponding path program 26 times [2021-11-19 14:07:33,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:33,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938357357] [2021-11-19 14:07:33,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:07:33,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:33,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:33,515 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:33,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-11-19 14:07:33,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:07:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:34,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:35,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:35,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938357357] [2021-11-19 14:07:35,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938357357] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:07:35,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:07:35,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:07:35,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182524753] [2021-11-19 14:07:35,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:35,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:07:35,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:07:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:35,677 INFO L87 Difference]: Start difference. First operand 302 states and 1009 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) [2021-11-19 14:07:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:37,877 INFO L93 Difference]: Finished difference Result 652 states and 1958 transitions. [2021-11-19 14:07:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:07:37,878 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 24 [2021-11-19 14:07:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:37,879 INFO L225 Difference]: With dead ends: 652 [2021-11-19 14:07:37,880 INFO L226 Difference]: Without dead ends: 652 [2021-11-19 14:07:37,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:07:37,880 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:37,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:07:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-19 14:07:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 306. [2021-11-19 14:07:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.380327868852459) internal successors, (1031), 305 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1031 transitions. [2021-11-19 14:07:37,892 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1031 transitions. Word has length 24 [2021-11-19 14:07:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:37,893 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 1031 transitions. [2021-11-19 14:07:37,893 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) [2021-11-19 14:07:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1031 transitions. [2021-11-19 14:07:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:37,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:37,894 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:37,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:38,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:38,095 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:38,095 INFO L85 PathProgramCache]: Analyzing trace with hash -450448991, now seen corresponding path program 27 times [2021-11-19 14:07:38,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:38,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122759111] [2021-11-19 14:07:38,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:07:38,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:38,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:38,097 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:38,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-19 14:07:38,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:07:38,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:38,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:38,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:38,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:40,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:40,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122759111] [2021-11-19 14:07:40,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122759111] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:07:40,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:07:40,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:07:40,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957054255] [2021-11-19 14:07:40,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:40,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:07:40,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:07:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:40,177 INFO L87 Difference]: Start difference. First operand 306 states and 1031 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) [2021-11-19 14:07:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:42,398 INFO L93 Difference]: Finished difference Result 624 states and 1898 transitions. [2021-11-19 14:07:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:07:42,399 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 24 [2021-11-19 14:07:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:42,400 INFO L225 Difference]: With dead ends: 624 [2021-11-19 14:07:42,400 INFO L226 Difference]: Without dead ends: 624 [2021-11-19 14:07:42,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:07:42,401 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:42,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:07:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-19 14:07:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 302. [2021-11-19 14:07:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.352159468438538) internal successors, (1009), 301 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1009 transitions. [2021-11-19 14:07:42,410 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1009 transitions. Word has length 24 [2021-11-19 14:07:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:42,410 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1009 transitions. [2021-11-19 14:07:42,411 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) [2021-11-19 14:07:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1009 transitions. [2021-11-19 14:07:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:42,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:42,411 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:42,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:42,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:42,616 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1895296160, now seen corresponding path program 29 times [2021-11-19 14:07:42,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:42,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056777345] [2021-11-19 14:07:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:07:42,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:42,618 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:42,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-19 14:07:42,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:07:42,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:42,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:07:42,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:43,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:44,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:44,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056777345] [2021-11-19 14:07:44,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056777345] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:44,625 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:44,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:07:44,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203591867] [2021-11-19 14:07:44,625 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:44,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:07:44,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:07:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:44,627 INFO L87 Difference]: Start difference. First operand 302 states and 1009 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:45,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:45,758 INFO L93 Difference]: Finished difference Result 512 states and 1627 transitions. [2021-11-19 14:07:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:07:45,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:07:45,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:45,760 INFO L225 Difference]: With dead ends: 512 [2021-11-19 14:07:45,761 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 14:07:45,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:07:45,761 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:45,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:07:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 14:07:45,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 302. [2021-11-19 14:07:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.352159468438538) internal successors, (1009), 301 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1009 transitions. [2021-11-19 14:07:45,776 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1009 transitions. Word has length 24 [2021-11-19 14:07:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:45,776 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1009 transitions. [2021-11-19 14:07:45,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1009 transitions. [2021-11-19 14:07:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:45,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:45,778 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:45,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:45,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:45,992 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:45,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1481720946, now seen corresponding path program 30 times [2021-11-19 14:07:45,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:45,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2369245] [2021-11-19 14:07:45,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:07:45,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:45,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:45,994 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:45,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-11-19 14:07:46,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:07:46,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:46,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:07:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:46,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:47,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:47,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2369245] [2021-11-19 14:07:47,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2369245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:47,954 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:47,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:07:47,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673721177] [2021-11-19 14:07:47,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:47,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:07:47,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:07:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:47,956 INFO L87 Difference]: Start difference. First operand 302 states and 1009 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:49,427 INFO L93 Difference]: Finished difference Result 498 states and 1603 transitions. [2021-11-19 14:07:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:07:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 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 24 [2021-11-19 14:07:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:49,429 INFO L225 Difference]: With dead ends: 498 [2021-11-19 14:07:49,429 INFO L226 Difference]: Without dead ends: 498 [2021-11-19 14:07:49,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:07:49,430 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:49,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:07:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-19 14:07:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 286. [2021-11-19 14:07:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.312280701754386) internal successors, (944), 285 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:49,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 944 transitions. [2021-11-19 14:07:49,439 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 944 transitions. Word has length 24 [2021-11-19 14:07:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:49,440 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 944 transitions. [2021-11-19 14:07:49,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 944 transitions. [2021-11-19 14:07:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:49,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:49,441 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:49,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:49,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:49,657 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash 449870613, now seen corresponding path program 28 times [2021-11-19 14:07:49,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:49,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309916662] [2021-11-19 14:07:49,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:07:49,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:49,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:49,660 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:49,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-19 14:07:49,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:07:49,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:49,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:49,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:50,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:51,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:51,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309916662] [2021-11-19 14:07:51,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309916662] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:07:51,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:07:51,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:07:51,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225294258] [2021-11-19 14:07:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:51,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:07:51,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:07:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:07:51,069 INFO L87 Difference]: Start difference. First operand 286 states and 944 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) [2021-11-19 14:07:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:52,836 INFO L93 Difference]: Finished difference Result 652 states and 1937 transitions. [2021-11-19 14:07:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:07:52,837 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 24 [2021-11-19 14:07:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:52,839 INFO L225 Difference]: With dead ends: 652 [2021-11-19 14:07:52,839 INFO L226 Difference]: Without dead ends: 652 [2021-11-19 14:07:52,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:07:52,839 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:52,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:07:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-19 14:07:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 284. [2021-11-19 14:07:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3074204946996466) internal successors, (936), 283 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 936 transitions. [2021-11-19 14:07:52,854 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 936 transitions. Word has length 24 [2021-11-19 14:07:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:52,854 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 936 transitions. [2021-11-19 14:07:52,855 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) [2021-11-19 14:07:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 936 transitions. [2021-11-19 14:07:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:52,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:52,856 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:52,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:53,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:53,056 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash -832687463, now seen corresponding path program 29 times [2021-11-19 14:07:53,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:53,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139231636] [2021-11-19 14:07:53,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:07:53,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:53,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:53,058 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:53,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-19 14:07:53,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:07:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:53,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:53,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:54,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:54,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139231636] [2021-11-19 14:07:54,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139231636] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:07:54,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:07:54,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:07:54,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189603408] [2021-11-19 14:07:54,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:54,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:07:54,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:54,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:07:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:54,958 INFO L87 Difference]: Start difference. First operand 284 states and 936 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) [2021-11-19 14:07:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:57,115 INFO L93 Difference]: Finished difference Result 618 states and 1849 transitions. [2021-11-19 14:07:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:07:57,116 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 24 [2021-11-19 14:07:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:57,117 INFO L225 Difference]: With dead ends: 618 [2021-11-19 14:07:57,117 INFO L226 Difference]: Without dead ends: 618 [2021-11-19 14:07:57,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:07:57,118 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:57,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:07:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-11-19 14:07:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 282. [2021-11-19 14:07:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.295373665480427) internal successors, (926), 281 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 926 transitions. [2021-11-19 14:07:57,130 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 926 transitions. Word has length 24 [2021-11-19 14:07:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:57,130 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 926 transitions. [2021-11-19 14:07:57,130 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) [2021-11-19 14:07:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 926 transitions. [2021-11-19 14:07:57,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:07:57,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:57,131 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:57,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:57,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:57,332 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:07:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:57,332 INFO L85 PathProgramCache]: Analyzing trace with hash 22619191, now seen corresponding path program 30 times [2021-11-19 14:07:57,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:57,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039376323] [2021-11-19 14:07:57,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:07:57,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:57,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:57,333 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:57,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-11-19 14:07:57,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:07:57,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:57,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:07:57,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:58,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:07:58,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:58,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039376323] [2021-11-19 14:07:58,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039376323] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:07:58,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:07:58,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:07:58,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415872376] [2021-11-19 14:07:58,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:58,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:07:58,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:07:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:58,981 INFO L87 Difference]: Start difference. First operand 282 states and 926 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) [2021-11-19 14:08:00,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:00,803 INFO L93 Difference]: Finished difference Result 586 states and 1779 transitions. [2021-11-19 14:08:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:08:00,804 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 24 [2021-11-19 14:08:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:00,805 INFO L225 Difference]: With dead ends: 586 [2021-11-19 14:08:00,805 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 14:08:00,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:08:00,806 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:00,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:08:00,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 14:08:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 272. [2021-11-19 14:08:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.2767527675276753) internal successors, (888), 271 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 888 transitions. [2021-11-19 14:08:00,814 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 888 transitions. Word has length 24 [2021-11-19 14:08:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:00,814 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 888 transitions. [2021-11-19 14:08:00,814 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) [2021-11-19 14:08:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 888 transitions. [2021-11-19 14:08:00,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:00,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:00,815 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:00,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:01,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:01,016 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:01,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2084501753, now seen corresponding path program 31 times [2021-11-19 14:08:01,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:01,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64772133] [2021-11-19 14:08:01,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:08:01,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:01,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:01,018 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:01,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-19 14:08:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:01,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:01,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:02,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:02,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64772133] [2021-11-19 14:08:02,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64772133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:02,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:02,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:08:02,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55482712] [2021-11-19 14:08:02,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:02,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:08:02,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:08:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:08:02,302 INFO L87 Difference]: Start difference. First operand 272 states and 888 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:03,820 INFO L93 Difference]: Finished difference Result 406 states and 1252 transitions. [2021-11-19 14:08:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:08:03,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:03,822 INFO L225 Difference]: With dead ends: 406 [2021-11-19 14:08:03,822 INFO L226 Difference]: Without dead ends: 398 [2021-11-19 14:08:03,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:08:03,823 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:03,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:08:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-19 14:08:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 278. [2021-11-19 14:08:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.2851985559566788) internal successors, (910), 277 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 910 transitions. [2021-11-19 14:08:03,831 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 910 transitions. Word has length 24 [2021-11-19 14:08:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:03,831 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 910 transitions. [2021-11-19 14:08:03,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 910 transitions. [2021-11-19 14:08:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:03,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:03,832 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:03,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:04,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:04,033 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1067529138, now seen corresponding path program 31 times [2021-11-19 14:08:04,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:04,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242391164] [2021-11-19 14:08:04,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:08:04,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:04,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:04,034 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:04,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-19 14:08:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:04,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:04,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:04,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:04,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242391164] [2021-11-19 14:08:04,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242391164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:04,669 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:04,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:08:04,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598149341] [2021-11-19 14:08:04,670 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:04,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:08:04,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:04,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:08:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:08:04,670 INFO L87 Difference]: Start difference. First operand 278 states and 910 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:05,588 INFO L93 Difference]: Finished difference Result 384 states and 1216 transitions. [2021-11-19 14:08:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:05,590 INFO L225 Difference]: With dead ends: 384 [2021-11-19 14:08:05,590 INFO L226 Difference]: Without dead ends: 384 [2021-11-19 14:08:05,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:08:05,590 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:05,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:08:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-19 14:08:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 284. [2021-11-19 14:08:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3074204946996466) internal successors, (936), 283 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 936 transitions. [2021-11-19 14:08:05,603 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 936 transitions. Word has length 24 [2021-11-19 14:08:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:05,603 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 936 transitions. [2021-11-19 14:08:05,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 936 transitions. [2021-11-19 14:08:05,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:05,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:05,604 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:05,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:05,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:05,817 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:05,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1871411918, now seen corresponding path program 32 times [2021-11-19 14:08:05,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:05,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092987358] [2021-11-19 14:08:05,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:08:05,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:05,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:05,819 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:05,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-11-19 14:08:05,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:08:05,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:06,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:06,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:06,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092987358] [2021-11-19 14:08:06,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092987358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:06,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:06,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:06,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377516696] [2021-11-19 14:08:06,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:06,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:06,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:06,614 INFO L87 Difference]: Start difference. First operand 284 states and 936 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:07,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:07,474 INFO L93 Difference]: Finished difference Result 390 states and 1227 transitions. [2021-11-19 14:08:07,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:07,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:07,476 INFO L225 Difference]: With dead ends: 390 [2021-11-19 14:08:07,476 INFO L226 Difference]: Without dead ends: 384 [2021-11-19 14:08:07,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:08:07,476 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:07,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:08:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-19 14:08:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 298. [2021-11-19 14:08:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.303030303030303) internal successors, (981), 297 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 981 transitions. [2021-11-19 14:08:07,484 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 981 transitions. Word has length 24 [2021-11-19 14:08:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:07,484 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 981 transitions. [2021-11-19 14:08:07,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 981 transitions. [2021-11-19 14:08:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:07,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:07,486 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:07,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2021-11-19 14:08:07,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:07,701 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:07,702 INFO L85 PathProgramCache]: Analyzing trace with hash -72172111, now seen corresponding path program 32 times [2021-11-19 14:08:07,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:07,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564028718] [2021-11-19 14:08:07,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:08:07,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:07,704 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:07,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-11-19 14:08:07,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:08:07,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:07,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:08,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:09,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:09,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564028718] [2021-11-19 14:08:09,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564028718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:09,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:09,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:09,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794460807] [2021-11-19 14:08:09,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:09,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:09,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:09,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:09,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:09,302 INFO L87 Difference]: Start difference. First operand 298 states and 981 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:11,184 INFO L93 Difference]: Finished difference Result 422 states and 1331 transitions. [2021-11-19 14:08:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:08:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:11,186 INFO L225 Difference]: With dead ends: 422 [2021-11-19 14:08:11,186 INFO L226 Difference]: Without dead ends: 418 [2021-11-19 14:08:11,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:08:11,187 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:11,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:08:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-19 14:08:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 306. [2021-11-19 14:08:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.2885245901639344) internal successors, (1003), 305 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1003 transitions. [2021-11-19 14:08:11,195 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1003 transitions. Word has length 24 [2021-11-19 14:08:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:11,195 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 1003 transitions. [2021-11-19 14:08:11,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1003 transitions. [2021-11-19 14:08:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:11,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:11,196 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:11,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2021-11-19 14:08:11,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:11,400 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1509403015, now seen corresponding path program 33 times [2021-11-19 14:08:11,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:11,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921344936] [2021-11-19 14:08:11,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:08:11,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:11,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:11,402 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:11,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-19 14:08:11,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:08:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:11,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:11,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:12,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:12,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921344936] [2021-11-19 14:08:12,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921344936] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:08:12,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:08:12,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:08:12,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512398238] [2021-11-19 14:08:12,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:12,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:08:12,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:12,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:08:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:12,602 INFO L87 Difference]: Start difference. First operand 306 states and 1003 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) [2021-11-19 14:08:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:14,213 INFO L93 Difference]: Finished difference Result 518 states and 1533 transitions. [2021-11-19 14:08:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:08:14,214 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 24 [2021-11-19 14:08:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:14,215 INFO L225 Difference]: With dead ends: 518 [2021-11-19 14:08:14,215 INFO L226 Difference]: Without dead ends: 518 [2021-11-19 14:08:14,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:08:14,215 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:14,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:08:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-19 14:08:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 298. [2021-11-19 14:08:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.2895622895622894) internal successors, (977), 297 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 977 transitions. [2021-11-19 14:08:14,223 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 977 transitions. Word has length 24 [2021-11-19 14:08:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:14,223 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 977 transitions. [2021-11-19 14:08:14,223 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) [2021-11-19 14:08:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 977 transitions. [2021-11-19 14:08:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:14,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:14,224 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:14,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:14,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:14,425 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:14,425 INFO L85 PathProgramCache]: Analyzing trace with hash 382006922, now seen corresponding path program 33 times [2021-11-19 14:08:14,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:14,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580803347] [2021-11-19 14:08:14,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:08:14,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:14,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:14,426 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:14,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-11-19 14:08:14,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:08:14,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:14,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:14,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:14,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:15,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:15,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580803347] [2021-11-19 14:08:15,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580803347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:15,178 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:15,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:15,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591885466] [2021-11-19 14:08:15,178 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:15,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:15,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:15,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:15,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:15,179 INFO L87 Difference]: Start difference. First operand 298 states and 977 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:16,039 INFO L93 Difference]: Finished difference Result 404 states and 1273 transitions. [2021-11-19 14:08:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:16,041 INFO L225 Difference]: With dead ends: 404 [2021-11-19 14:08:16,041 INFO L226 Difference]: Without dead ends: 404 [2021-11-19 14:08:16,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:08:16,042 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:16,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:08:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-19 14:08:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 290. [2021-11-19 14:08:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.3044982698961936) internal successors, (955), 289 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 955 transitions. [2021-11-19 14:08:16,052 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 955 transitions. Word has length 24 [2021-11-19 14:08:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:16,052 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 955 transitions. [2021-11-19 14:08:16,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 955 transitions. [2021-11-19 14:08:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:16,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:16,053 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:16,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:16,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:16,254 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:16,254 INFO L85 PathProgramCache]: Analyzing trace with hash 484063899, now seen corresponding path program 34 times [2021-11-19 14:08:16,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:16,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346834497] [2021-11-19 14:08:16,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:08:16,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:16,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:16,256 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:16,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-11-19 14:08:16,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:08:16,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:16,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:17,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:17,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346834497] [2021-11-19 14:08:17,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346834497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:17,367 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:17,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:08:17,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315549461] [2021-11-19 14:08:17,367 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:17,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:08:17,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:08:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:08:17,368 INFO L87 Difference]: Start difference. First operand 290 states and 955 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:19,182 INFO L93 Difference]: Finished difference Result 454 states and 1383 transitions. [2021-11-19 14:08:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:08:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:19,184 INFO L225 Difference]: With dead ends: 454 [2021-11-19 14:08:19,185 INFO L226 Difference]: Without dead ends: 446 [2021-11-19 14:08:19,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:08:19,187 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:19,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:08:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-19 14:08:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 292. [2021-11-19 14:08:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.2989690721649483) internal successors, (960), 291 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 960 transitions. [2021-11-19 14:08:19,198 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 960 transitions. Word has length 24 [2021-11-19 14:08:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:19,199 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 960 transitions. [2021-11-19 14:08:19,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 960 transitions. [2021-11-19 14:08:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:19,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:19,200 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:19,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:19,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:19,404 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:19,404 INFO L85 PathProgramCache]: Analyzing trace with hash -61669007, now seen corresponding path program 35 times [2021-11-19 14:08:19,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:19,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602839800] [2021-11-19 14:08:19,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:08:19,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:19,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:19,406 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:19,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-19 14:08:19,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:08:19,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:19,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:19,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:19,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:20,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:20,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602839800] [2021-11-19 14:08:20,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602839800] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:20,607 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:20,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:20,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124082429] [2021-11-19 14:08:20,607 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:20,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:20,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:20,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:20,608 INFO L87 Difference]: Start difference. First operand 292 states and 960 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:22,737 INFO L93 Difference]: Finished difference Result 442 states and 1372 transitions. [2021-11-19 14:08:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:08:22,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:22,739 INFO L225 Difference]: With dead ends: 442 [2021-11-19 14:08:22,739 INFO L226 Difference]: Without dead ends: 438 [2021-11-19 14:08:22,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:08:22,741 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:22,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:08:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-19 14:08:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 300. [2021-11-19 14:08:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.280936454849498) internal successors, (981), 299 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 981 transitions. [2021-11-19 14:08:22,749 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 981 transitions. Word has length 24 [2021-11-19 14:08:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:22,749 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 981 transitions. [2021-11-19 14:08:22,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 981 transitions. [2021-11-19 14:08:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:22,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:22,751 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:22,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:22,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:22,951 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:22,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1175052025, now seen corresponding path program 36 times [2021-11-19 14:08:22,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:22,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705261038] [2021-11-19 14:08:22,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:08:22,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:22,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:22,953 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:22,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-11-19 14:08:23,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:08:23,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:23,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:24,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:24,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705261038] [2021-11-19 14:08:24,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705261038] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:08:24,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:08:24,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:08:24,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222116390] [2021-11-19 14:08:24,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:24,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:08:24,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:24,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:08:24,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:24,614 INFO L87 Difference]: Start difference. First operand 300 states and 981 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) [2021-11-19 14:08:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:27,004 INFO L93 Difference]: Finished difference Result 540 states and 1575 transitions. [2021-11-19 14:08:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:08:27,005 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 24 [2021-11-19 14:08:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:27,006 INFO L225 Difference]: With dead ends: 540 [2021-11-19 14:08:27,007 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 14:08:27,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:08:27,007 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:27,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:08:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 14:08:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 290. [2021-11-19 14:08:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.3044982698961936) internal successors, (955), 289 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 955 transitions. [2021-11-19 14:08:27,017 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 955 transitions. Word has length 24 [2021-11-19 14:08:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:27,017 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 955 transitions. [2021-11-19 14:08:27,017 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) [2021-11-19 14:08:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 955 transitions. [2021-11-19 14:08:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:27,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:27,018 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:27,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:27,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:27,219 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash -479783816, now seen corresponding path program 34 times [2021-11-19 14:08:27,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:27,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195961744] [2021-11-19 14:08:27,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:08:27,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:27,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:27,221 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:27,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-11-19 14:08:27,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:08:27,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:27,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:27,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:27,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:28,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:28,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195961744] [2021-11-19 14:08:28,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195961744] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:08:28,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:08:28,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:08:28,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908040757] [2021-11-19 14:08:28,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:28,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:08:28,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:08:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:08:28,052 INFO L87 Difference]: Start difference. First operand 290 states and 955 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) [2021-11-19 14:08:29,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:29,248 INFO L93 Difference]: Finished difference Result 476 states and 1488 transitions. [2021-11-19 14:08:29,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:29,249 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 24 [2021-11-19 14:08:29,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:29,250 INFO L225 Difference]: With dead ends: 476 [2021-11-19 14:08:29,250 INFO L226 Difference]: Without dead ends: 476 [2021-11-19 14:08:29,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:08:29,251 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:29,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:08:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-19 14:08:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 294. [2021-11-19 14:08:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.3208191126279862) internal successors, (973), 293 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 973 transitions. [2021-11-19 14:08:29,262 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 973 transitions. Word has length 24 [2021-11-19 14:08:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:29,263 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 973 transitions. [2021-11-19 14:08:29,263 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) [2021-11-19 14:08:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 973 transitions. [2021-11-19 14:08:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:29,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:29,264 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:29,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:29,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:29,464 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash -103761838, now seen corresponding path program 35 times [2021-11-19 14:08:29,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:29,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992199112] [2021-11-19 14:08:29,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:08:29,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:29,466 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:29,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-11-19 14:08:29,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:08:29,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:29,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:29,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:29,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:30,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:30,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992199112] [2021-11-19 14:08:30,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992199112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:30,582 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:30,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:30,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494070716] [2021-11-19 14:08:30,583 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:30,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:30,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:30,583 INFO L87 Difference]: Start difference. First operand 294 states and 973 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:31,486 INFO L93 Difference]: Finished difference Result 460 states and 1454 transitions. [2021-11-19 14:08:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:31,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:31,488 INFO L225 Difference]: With dead ends: 460 [2021-11-19 14:08:31,488 INFO L226 Difference]: Without dead ends: 460 [2021-11-19 14:08:31,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:08:31,488 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:31,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:08:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-19 14:08:31,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 298. [2021-11-19 14:08:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.3501683501683504) internal successors, (995), 297 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 995 transitions. [2021-11-19 14:08:31,496 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 995 transitions. Word has length 24 [2021-11-19 14:08:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:31,496 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 995 transitions. [2021-11-19 14:08:31,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 995 transitions. [2021-11-19 14:08:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:31,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:31,498 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:31,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2021-11-19 14:08:31,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:31,715 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:31,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:31,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1795941120, now seen corresponding path program 36 times [2021-11-19 14:08:31,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:31,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611349471] [2021-11-19 14:08:31,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:08:31,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:31,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:31,718 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:31,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-11-19 14:08:31,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:08:31,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:31,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:31,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:32,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:33,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:33,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611349471] [2021-11-19 14:08:33,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611349471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:33,255 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:33,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:33,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439084006] [2021-11-19 14:08:33,256 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:33,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:33,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:33,257 INFO L87 Difference]: Start difference. First operand 298 states and 995 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:34,508 INFO L93 Difference]: Finished difference Result 446 states and 1422 transitions. [2021-11-19 14:08:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:34,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:34,510 INFO L225 Difference]: With dead ends: 446 [2021-11-19 14:08:34,510 INFO L226 Difference]: Without dead ends: 446 [2021-11-19 14:08:34,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:08:34,511 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:34,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:08:34,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-19 14:08:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 290. [2021-11-19 14:08:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.3044982698961936) internal successors, (955), 289 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 955 transitions. [2021-11-19 14:08:34,523 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 955 transitions. Word has length 24 [2021-11-19 14:08:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:34,523 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 955 transitions. [2021-11-19 14:08:34,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 955 transitions. [2021-11-19 14:08:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:34,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:34,525 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:34,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:34,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:34,740 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash 525245834, now seen corresponding path program 37 times [2021-11-19 14:08:34,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:34,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487970078] [2021-11-19 14:08:34,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:08:34,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:34,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:34,742 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:34,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-19 14:08:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:34,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:35,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:35,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:35,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487970078] [2021-11-19 14:08:35,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487970078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:35,948 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:35,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:35,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497919147] [2021-11-19 14:08:35,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:35,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:35,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:35,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:35,949 INFO L87 Difference]: Start difference. First operand 290 states and 955 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:37,063 INFO L93 Difference]: Finished difference Result 462 states and 1451 transitions. [2021-11-19 14:08:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:37,065 INFO L225 Difference]: With dead ends: 462 [2021-11-19 14:08:37,065 INFO L226 Difference]: Without dead ends: 456 [2021-11-19 14:08:37,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:08:37,066 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:37,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:08:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-19 14:08:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 298. [2021-11-19 14:08:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.3501683501683504) internal successors, (995), 297 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 995 transitions. [2021-11-19 14:08:37,072 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 995 transitions. Word has length 24 [2021-11-19 14:08:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:37,072 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 995 transitions. [2021-11-19 14:08:37,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 995 transitions. [2021-11-19 14:08:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:37,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:37,073 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:37,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:37,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:37,274 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:37,274 INFO L85 PathProgramCache]: Analyzing trace with hash -46208972, now seen corresponding path program 38 times [2021-11-19 14:08:37,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:37,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274807987] [2021-11-19 14:08:37,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:08:37,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:37,275 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:37,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-11-19 14:08:37,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:08:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:37,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:38,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:38,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274807987] [2021-11-19 14:08:38,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274807987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:38,407 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:38,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:38,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853473938] [2021-11-19 14:08:38,407 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:38,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:38,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:38,408 INFO L87 Difference]: Start difference. First operand 298 states and 995 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:39,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:39,459 INFO L93 Difference]: Finished difference Result 464 states and 1470 transitions. [2021-11-19 14:08:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:39,460 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:39,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:39,461 INFO L225 Difference]: With dead ends: 464 [2021-11-19 14:08:39,461 INFO L226 Difference]: Without dead ends: 464 [2021-11-19 14:08:39,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:08:39,461 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:39,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:08:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-19 14:08:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 296. [2021-11-19 14:08:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.3559322033898304) internal successors, (990), 295 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 990 transitions. [2021-11-19 14:08:39,469 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 990 transitions. Word has length 24 [2021-11-19 14:08:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:39,469 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 990 transitions. [2021-11-19 14:08:39,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 990 transitions. [2021-11-19 14:08:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:39,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:39,470 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:39,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:39,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:39,670 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:39,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2133561016, now seen corresponding path program 39 times [2021-11-19 14:08:39,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:39,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180939534] [2021-11-19 14:08:39,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:08:39,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:39,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:39,673 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:39,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-11-19 14:08:39,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:08:39,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:39,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:39,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:40,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:40,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:40,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180939534] [2021-11-19 14:08:40,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180939534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:40,786 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:40,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:40,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127172760] [2021-11-19 14:08:40,787 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:40,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:40,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:40,787 INFO L87 Difference]: Start difference. First operand 296 states and 990 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:41,750 INFO L93 Difference]: Finished difference Result 476 states and 1472 transitions. [2021-11-19 14:08:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:41,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:41,751 INFO L225 Difference]: With dead ends: 476 [2021-11-19 14:08:41,752 INFO L226 Difference]: Without dead ends: 470 [2021-11-19 14:08:41,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:08:41,752 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:41,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:08:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-19 14:08:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 304. [2021-11-19 14:08:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.3795379537953796) internal successors, (1024), 303 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1024 transitions. [2021-11-19 14:08:41,759 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1024 transitions. Word has length 24 [2021-11-19 14:08:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:41,759 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1024 transitions. [2021-11-19 14:08:41,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:41,759 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1024 transitions. [2021-11-19 14:08:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:41,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:41,761 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:41,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:41,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:41,965 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:41,966 INFO L85 PathProgramCache]: Analyzing trace with hash 189976987, now seen corresponding path program 37 times [2021-11-19 14:08:41,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:41,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896059254] [2021-11-19 14:08:41,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:08:41,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:41,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:41,967 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:41,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-11-19 14:08:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:42,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:42,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:43,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:43,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896059254] [2021-11-19 14:08:43,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896059254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:43,405 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:43,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:43,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882528044] [2021-11-19 14:08:43,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:43,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:43,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:43,406 INFO L87 Difference]: Start difference. First operand 304 states and 1024 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:46,075 INFO L93 Difference]: Finished difference Result 506 states and 1577 transitions. [2021-11-19 14:08:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:08:46,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:46,077 INFO L225 Difference]: With dead ends: 506 [2021-11-19 14:08:46,078 INFO L226 Difference]: Without dead ends: 502 [2021-11-19 14:08:46,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:08:46,078 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:46,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:08:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-19 14:08:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 314. [2021-11-19 14:08:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3833865814696487) internal successors, (1059), 313 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1059 transitions. [2021-11-19 14:08:46,087 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1059 transitions. Word has length 24 [2021-11-19 14:08:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:46,087 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1059 transitions. [2021-11-19 14:08:46,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1059 transitions. [2021-11-19 14:08:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:46,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:46,089 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:46,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2021-11-19 14:08:46,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:46,290 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1771552113, now seen corresponding path program 38 times [2021-11-19 14:08:46,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:46,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327316181] [2021-11-19 14:08:46,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:08:46,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:46,297 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:46,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-11-19 14:08:46,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:08:46,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:47,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:47,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:47,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327316181] [2021-11-19 14:08:47,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327316181] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:08:47,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:08:47,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:08:47,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644160042] [2021-11-19 14:08:47,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:47,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:08:47,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:08:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:47,969 INFO L87 Difference]: Start difference. First operand 314 states and 1059 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) [2021-11-19 14:08:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:50,110 INFO L93 Difference]: Finished difference Result 572 states and 1722 transitions. [2021-11-19 14:08:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:08:50,112 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 24 [2021-11-19 14:08:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:50,113 INFO L225 Difference]: With dead ends: 572 [2021-11-19 14:08:50,113 INFO L226 Difference]: Without dead ends: 572 [2021-11-19 14:08:50,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:08:50,113 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:50,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:08:50,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-19 14:08:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 314. [2021-11-19 14:08:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3833865814696487) internal successors, (1059), 313 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1059 transitions. [2021-11-19 14:08:50,123 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1059 transitions. Word has length 24 [2021-11-19 14:08:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:50,124 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1059 transitions. [2021-11-19 14:08:50,124 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) [2021-11-19 14:08:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1059 transitions. [2021-11-19 14:08:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:50,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:50,125 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:50,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2021-11-19 14:08:50,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:50,326 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:50,326 INFO L85 PathProgramCache]: Analyzing trace with hash 644156020, now seen corresponding path program 40 times [2021-11-19 14:08:50,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:50,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826861410] [2021-11-19 14:08:50,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:08:50,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:50,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:50,328 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:50,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2021-11-19 14:08:50,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:08:50,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:50,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:08:50,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:50,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:51,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:51,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826861410] [2021-11-19 14:08:51,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826861410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:51,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:51,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:51,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913372346] [2021-11-19 14:08:51,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:51,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:51,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:51,501 INFO L87 Difference]: Start difference. First operand 314 states and 1059 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:52,519 INFO L93 Difference]: Finished difference Result 482 states and 1524 transitions. [2021-11-19 14:08:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:08:52,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:52,521 INFO L225 Difference]: With dead ends: 482 [2021-11-19 14:08:52,521 INFO L226 Difference]: Without dead ends: 482 [2021-11-19 14:08:52,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:08:52,522 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:52,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:08:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-19 14:08:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 306. [2021-11-19 14:08:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 305 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1029 transitions. [2021-11-19 14:08:52,533 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1029 transitions. Word has length 24 [2021-11-19 14:08:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:52,534 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 1029 transitions. [2021-11-19 14:08:52,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1029 transitions. [2021-11-19 14:08:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:52,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:52,536 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:52,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2021-11-19 14:08:52,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:52,750 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1800917945, now seen corresponding path program 39 times [2021-11-19 14:08:52,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:52,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219177265] [2021-11-19 14:08:52,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:08:52,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:52,753 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:52,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-11-19 14:08:52,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:08:52,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:53,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:53,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:53,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:54,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:54,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219177265] [2021-11-19 14:08:54,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219177265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:54,401 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:54,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:08:54,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317604225] [2021-11-19 14:08:54,402 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:54,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:08:54,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:08:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:54,403 INFO L87 Difference]: Start difference. First operand 306 states and 1029 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:57,060 INFO L93 Difference]: Finished difference Result 498 states and 1548 transitions. [2021-11-19 14:08:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:08:57,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:08:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:57,062 INFO L225 Difference]: With dead ends: 498 [2021-11-19 14:08:57,062 INFO L226 Difference]: Without dead ends: 494 [2021-11-19 14:08:57,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:08:57,063 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 139 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:57,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 0 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:08:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-19 14:08:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 310. [2021-11-19 14:08:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.3754045307443366) internal successors, (1043), 309 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1043 transitions. [2021-11-19 14:08:57,071 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1043 transitions. Word has length 24 [2021-11-19 14:08:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:57,071 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1043 transitions. [2021-11-19 14:08:57,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1043 transitions. [2021-11-19 14:08:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:08:57,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:57,072 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:57,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:57,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:57,287 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:08:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash 687534927, now seen corresponding path program 40 times [2021-11-19 14:08:57,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:57,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512125025] [2021-11-19 14:08:57,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:08:57,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:57,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:57,289 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:57,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2021-11-19 14:08:57,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:08:57,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:57,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:08:57,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:58,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:08:59,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:59,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512125025] [2021-11-19 14:08:59,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512125025] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:08:59,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:08:59,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:08:59,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070469791] [2021-11-19 14:08:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:59,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:08:59,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:08:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:59,057 INFO L87 Difference]: Start difference. First operand 310 states and 1043 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) [2021-11-19 14:09:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:01,031 INFO L93 Difference]: Finished difference Result 546 states and 1654 transitions. [2021-11-19 14:09:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:09:01,032 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 24 [2021-11-19 14:09:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:01,033 INFO L225 Difference]: With dead ends: 546 [2021-11-19 14:09:01,033 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:09:01,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:09:01,033 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:01,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:09:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:09:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 308. [2021-11-19 14:09:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.3811074918566777) internal successors, (1038), 307 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1038 transitions. [2021-11-19 14:09:01,041 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1038 transitions. Word has length 24 [2021-11-19 14:09:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:01,041 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 1038 transitions. [2021-11-19 14:09:01,041 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) [2021-11-19 14:09:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1038 transitions. [2021-11-19 14:09:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:01,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:01,042 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:01,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:01,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:01,244 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:01,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1616416923, now seen corresponding path program 41 times [2021-11-19 14:09:01,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:01,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562445504] [2021-11-19 14:09:01,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:09:01,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:01,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:01,245 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:01,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-11-19 14:09:01,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:09:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:01,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:01,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:01,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:02,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:02,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562445504] [2021-11-19 14:09:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562445504] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:09:02,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:09:02,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:09:02,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924114519] [2021-11-19 14:09:02,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:02,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:09:02,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:09:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:02,986 INFO L87 Difference]: Start difference. First operand 308 states and 1038 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) [2021-11-19 14:09:04,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:04,830 INFO L93 Difference]: Finished difference Result 606 states and 1774 transitions. [2021-11-19 14:09:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:09:04,831 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 24 [2021-11-19 14:09:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:04,832 INFO L225 Difference]: With dead ends: 606 [2021-11-19 14:09:04,832 INFO L226 Difference]: Without dead ends: 606 [2021-11-19 14:09:04,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:09:04,833 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:04,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:09:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-19 14:09:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 306. [2021-11-19 14:09:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.3704918032786884) internal successors, (1028), 305 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1028 transitions. [2021-11-19 14:09:04,842 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1028 transitions. Word has length 24 [2021-11-19 14:09:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:04,842 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 1028 transitions. [2021-11-19 14:09:04,842 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) [2021-11-19 14:09:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1028 transitions. [2021-11-19 14:09:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:04,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:04,843 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:04,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:05,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:05,044 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:05,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1823243719, now seen corresponding path program 42 times [2021-11-19 14:09:05,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:05,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619486983] [2021-11-19 14:09:05,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:09:05,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:05,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:05,046 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:05,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2021-11-19 14:09:05,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:09:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:05,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:05,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:05,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:07,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:07,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619486983] [2021-11-19 14:09:07,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619486983] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:09:07,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:09:07,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:09:07,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466567273] [2021-11-19 14:09:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:07,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:09:07,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:09:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:07,024 INFO L87 Difference]: Start difference. First operand 306 states and 1028 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) [2021-11-19 14:09:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:09,433 INFO L93 Difference]: Finished difference Result 576 states and 1708 transitions. [2021-11-19 14:09:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:09:09,434 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 24 [2021-11-19 14:09:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:09,436 INFO L225 Difference]: With dead ends: 576 [2021-11-19 14:09:09,436 INFO L226 Difference]: Without dead ends: 576 [2021-11-19 14:09:09,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:09:09,436 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:09,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:09:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-19 14:09:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 296. [2021-11-19 14:09:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.3559322033898304) internal successors, (990), 295 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 990 transitions. [2021-11-19 14:09:09,449 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 990 transitions. Word has length 24 [2021-11-19 14:09:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:09,449 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 990 transitions. [2021-11-19 14:09:09,450 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) [2021-11-19 14:09:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 990 transitions. [2021-11-19 14:09:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:09,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:09,451 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:09,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:09,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:09,651 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1026876408, now seen corresponding path program 41 times [2021-11-19 14:09:09,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:09,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835856145] [2021-11-19 14:09:09,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:09:09,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:09,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:09,653 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:09,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2021-11-19 14:09:09,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:09:09,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:10,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:11,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:11,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835856145] [2021-11-19 14:09:11,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835856145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:11,147 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:11,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:09:11,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264176683] [2021-11-19 14:09:11,147 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:11,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:09:11,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:11,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:09:11,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:11,148 INFO L87 Difference]: Start difference. First operand 296 states and 990 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:12,363 INFO L93 Difference]: Finished difference Result 476 states and 1526 transitions. [2021-11-19 14:09:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:12,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:12,365 INFO L225 Difference]: With dead ends: 476 [2021-11-19 14:09:12,365 INFO L226 Difference]: Without dead ends: 476 [2021-11-19 14:09:12,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:09:12,365 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:12,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:09:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-19 14:09:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 300. [2021-11-19 14:09:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.3846153846153846) internal successors, (1012), 299 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 1012 transitions. [2021-11-19 14:09:12,373 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 1012 transitions. Word has length 24 [2021-11-19 14:09:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:12,373 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 1012 transitions. [2021-11-19 14:09:12,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 1012 transitions. [2021-11-19 14:09:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:12,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:12,374 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:12,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:12,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:12,575 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash 108926218, now seen corresponding path program 42 times [2021-11-19 14:09:12,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:12,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363422678] [2021-11-19 14:09:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:09:12,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:12,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:12,577 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:12,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2021-11-19 14:09:12,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:09:12,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:12,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:13,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:13,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:13,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363422678] [2021-11-19 14:09:13,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363422678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:13,983 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:13,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:09:13,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845672098] [2021-11-19 14:09:13,983 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:13,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:09:13,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:09:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:13,984 INFO L87 Difference]: Start difference. First operand 300 states and 1012 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:15,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:15,468 INFO L93 Difference]: Finished difference Result 462 states and 1502 transitions. [2021-11-19 14:09:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:15,470 INFO L225 Difference]: With dead ends: 462 [2021-11-19 14:09:15,470 INFO L226 Difference]: Without dead ends: 462 [2021-11-19 14:09:15,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:09:15,470 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:15,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:09:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-19 14:09:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 292. [2021-11-19 14:09:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.3195876288659796) internal successors, (966), 291 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 966 transitions. [2021-11-19 14:09:15,477 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 966 transitions. Word has length 24 [2021-11-19 14:09:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:15,478 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 966 transitions. [2021-11-19 14:09:15,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 966 transitions. [2021-11-19 14:09:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:15,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:15,479 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:15,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:15,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:15,679 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:15,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1276664903, now seen corresponding path program 43 times [2021-11-19 14:09:15,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:15,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796392250] [2021-11-19 14:09:15,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:09:15,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:15,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:15,681 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:15,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-11-19 14:09:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:15,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:15,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:16,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:16,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:16,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796392250] [2021-11-19 14:09:16,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796392250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:16,480 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:16,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:09:16,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969117998] [2021-11-19 14:09:16,481 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:16,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:09:16,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:09:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:09:16,481 INFO L87 Difference]: Start difference. First operand 292 states and 966 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:17,720 INFO L93 Difference]: Finished difference Result 372 states and 1164 transitions. [2021-11-19 14:09:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:09:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:17,721 INFO L225 Difference]: With dead ends: 372 [2021-11-19 14:09:17,721 INFO L226 Difference]: Without dead ends: 364 [2021-11-19 14:09:17,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:09:17,722 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:17,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:09:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-19 14:09:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 294. [2021-11-19 14:09:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.3139931740614332) internal successors, (971), 293 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 971 transitions. [2021-11-19 14:09:17,727 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 971 transitions. Word has length 24 [2021-11-19 14:09:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:17,727 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 971 transitions. [2021-11-19 14:09:17,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 971 transitions. [2021-11-19 14:09:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:17,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:17,728 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:17,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:17,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:17,929 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash 730931997, now seen corresponding path program 44 times [2021-11-19 14:09:17,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:17,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774852592] [2021-11-19 14:09:17,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:09:17,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:17,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:17,931 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:17,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2021-11-19 14:09:18,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:09:18,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:18,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:18,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:18,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774852592] [2021-11-19 14:09:18,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774852592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:18,892 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:18,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:09:18,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716446286] [2021-11-19 14:09:18,892 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:18,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:09:18,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:09:18,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:09:18,893 INFO L87 Difference]: Start difference. First operand 294 states and 971 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:20,878 INFO L93 Difference]: Finished difference Result 376 states and 1178 transitions. [2021-11-19 14:09:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:09:20,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:20,880 INFO L225 Difference]: With dead ends: 376 [2021-11-19 14:09:20,880 INFO L226 Difference]: Without dead ends: 372 [2021-11-19 14:09:20,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:09:20,880 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:20,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:09:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-19 14:09:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 302. [2021-11-19 14:09:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.2956810631229234) internal successors, (992), 301 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 992 transitions. [2021-11-19 14:09:20,887 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 992 transitions. Word has length 24 [2021-11-19 14:09:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:20,887 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 992 transitions. [2021-11-19 14:09:20,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 992 transitions. [2021-11-19 14:09:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:20,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:20,888 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:20,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:21,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:21,089 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash -382451021, now seen corresponding path program 45 times [2021-11-19 14:09:21,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:21,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268892603] [2021-11-19 14:09:21,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:09:21,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:21,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:21,091 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:21,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-11-19 14:09:21,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:09:21,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:21,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:21,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:22,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:22,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268892603] [2021-11-19 14:09:22,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268892603] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:09:22,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:09:22,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:09:22,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060875113] [2021-11-19 14:09:22,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:22,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:09:22,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:22,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:09:22,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:09:22,238 INFO L87 Difference]: Start difference. First operand 302 states and 992 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) [2021-11-19 14:09:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:23,909 INFO L93 Difference]: Finished difference Result 448 states and 1325 transitions. [2021-11-19 14:09:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:09:23,910 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 24 [2021-11-19 14:09:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:23,911 INFO L225 Difference]: With dead ends: 448 [2021-11-19 14:09:23,911 INFO L226 Difference]: Without dead ends: 448 [2021-11-19 14:09:23,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:09:23,912 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:23,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:09:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-19 14:09:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 292. [2021-11-19 14:09:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.3195876288659796) internal successors, (966), 291 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 966 transitions. [2021-11-19 14:09:23,920 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 966 transitions. Word has length 24 [2021-11-19 14:09:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:23,920 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 966 transitions. [2021-11-19 14:09:23,920 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) [2021-11-19 14:09:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 966 transitions. [2021-11-19 14:09:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:23,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:23,921 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:23,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:24,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:24,122 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:24,122 INFO L85 PathProgramCache]: Analyzing trace with hash 125234745, now seen corresponding path program 46 times [2021-11-19 14:09:24,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:24,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386789701] [2021-11-19 14:09:24,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:09:24,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:24,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:24,123 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:24,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-11-19 14:09:24,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:09:24,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:24,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:24,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:24,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:24,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:24,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386789701] [2021-11-19 14:09:24,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386789701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:24,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:24,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:09:24,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927155049] [2021-11-19 14:09:24,935 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:24,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:09:24,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:09:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:09:24,935 INFO L87 Difference]: Start difference. First operand 292 states and 966 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:26,371 INFO L93 Difference]: Finished difference Result 372 states and 1185 transitions. [2021-11-19 14:09:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:09:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:26,372 INFO L225 Difference]: With dead ends: 372 [2021-11-19 14:09:26,372 INFO L226 Difference]: Without dead ends: 368 [2021-11-19 14:09:26,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:09:26,373 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:26,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:09:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-19 14:09:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 304. [2021-11-19 14:09:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.297029702970297) internal successors, (999), 303 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 999 transitions. [2021-11-19 14:09:26,379 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 999 transitions. Word has length 24 [2021-11-19 14:09:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:26,379 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 999 transitions. [2021-11-19 14:09:26,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 999 transitions. [2021-11-19 14:09:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:26,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:26,381 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:26,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:26,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:26,581 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash -988148273, now seen corresponding path program 47 times [2021-11-19 14:09:26,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:26,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453065561] [2021-11-19 14:09:26,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:09:26,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:26,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:26,583 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:26,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-11-19 14:09:26,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:09:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:27,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:27,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:27,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453065561] [2021-11-19 14:09:27,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453065561] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:09:27,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:09:27,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:09:27,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200932578] [2021-11-19 14:09:27,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:27,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:09:27,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:09:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:09:27,577 INFO L87 Difference]: Start difference. First operand 304 states and 999 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) [2021-11-19 14:09:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:29,164 INFO L93 Difference]: Finished difference Result 440 states and 1336 transitions. [2021-11-19 14:09:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:09:29,165 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 24 [2021-11-19 14:09:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:29,166 INFO L225 Difference]: With dead ends: 440 [2021-11-19 14:09:29,166 INFO L226 Difference]: Without dead ends: 440 [2021-11-19 14:09:29,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:09:29,167 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:29,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:09:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-19 14:09:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 302. [2021-11-19 14:09:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.302325581395349) internal successors, (994), 301 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 994 transitions. [2021-11-19 14:09:29,174 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 994 transitions. Word has length 24 [2021-11-19 14:09:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:29,175 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 994 transitions. [2021-11-19 14:09:29,175 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) [2021-11-19 14:09:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 994 transitions. [2021-11-19 14:09:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:29,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:29,176 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:29,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:29,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:29,376 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash -426660711, now seen corresponding path program 48 times [2021-11-19 14:09:29,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:29,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824628798] [2021-11-19 14:09:29,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:09:29,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:29,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:29,378 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:29,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2021-11-19 14:09:29,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:09:29,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:29,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:30,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:30,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824628798] [2021-11-19 14:09:30,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824628798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:30,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [479841186] [2021-11-19 14:09:30,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:09:30,283 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:09:30,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:09:30,285 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:09:30,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2021-11-19 14:09:30,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:09:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:30,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:30,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:31,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:31,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [479841186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:31,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423271693] [2021-11-19 14:09:31,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:09:31,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:09:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:09:31,236 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:09:31,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-19 14:09:31,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:09:31,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:31,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:09:31,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:31,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:32,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423271693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:32,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:09:32,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-19 14:09:32,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078077903] [2021-11-19 14:09:32,463 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:09:32,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:09:32,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:32,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:09:32,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:09:32,463 INFO L87 Difference]: Start difference. First operand 302 states and 994 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:34,325 INFO L93 Difference]: Finished difference Result 382 states and 1197 transitions. [2021-11-19 14:09:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:09:34,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 14:09:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:34,326 INFO L225 Difference]: With dead ends: 382 [2021-11-19 14:09:34,327 INFO L226 Difference]: Without dead ends: 382 [2021-11-19 14:09:34,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:09:34,327 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:34,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:09:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-19 14:09:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 298. [2021-11-19 14:09:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.303030303030303) internal successors, (981), 297 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 981 transitions. [2021-11-19 14:09:34,333 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 981 transitions. Word has length 24 [2021-11-19 14:09:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:34,333 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 981 transitions. [2021-11-19 14:09:34,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 981 transitions. [2021-11-19 14:09:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:34,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:34,334 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:34,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-11-19 14:09:34,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2021-11-19 14:09:34,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (102)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:34,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:09:34,935 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -572981092, now seen corresponding path program 43 times [2021-11-19 14:09:34,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:34,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146804697] [2021-11-19 14:09:34,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:09:34,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:34,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:34,937 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:34,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2021-11-19 14:09:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:35,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:35,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:35,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:35,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146804697] [2021-11-19 14:09:35,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146804697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:35,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [866165524] [2021-11-19 14:09:35,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:09:35,575 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:09:35,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:09:35,576 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:09:35,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2021-11-19 14:09:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:35,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:35,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:35,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:36,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [866165524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:36,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626538282] [2021-11-19 14:09:36,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:09:36,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:09:36,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:09:36,166 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:09:36,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-19 14:09:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:36,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:36,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:36,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:36,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626538282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:36,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:09:36,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 10 [2021-11-19 14:09:36,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005020376] [2021-11-19 14:09:36,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:09:36,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:09:36,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:09:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:09:36,558 INFO L87 Difference]: Start difference. First operand 298 states and 981 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:37,464 INFO L93 Difference]: Finished difference Result 426 states and 1358 transitions. [2021-11-19 14:09:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:37,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:37,465 INFO L225 Difference]: With dead ends: 426 [2021-11-19 14:09:37,465 INFO L226 Difference]: Without dead ends: 426 [2021-11-19 14:09:37,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:37,466 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:37,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:09:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-19 14:09:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 296. [2021-11-19 14:09:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.298305084745763) internal successors, (973), 295 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 973 transitions. [2021-11-19 14:09:37,472 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 973 transitions. Word has length 24 [2021-11-19 14:09:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:37,472 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 973 transitions. [2021-11-19 14:09:37,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 973 transitions. [2021-11-19 14:09:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:37,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:37,473 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:37,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:37,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:37,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2021-11-19 14:09:38,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:38,081 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:38,081 INFO L85 PathProgramCache]: Analyzing trace with hash -196959114, now seen corresponding path program 44 times [2021-11-19 14:09:38,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:38,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015539159] [2021-11-19 14:09:38,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:09:38,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:38,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:38,083 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:38,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-11-19 14:09:38,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:09:38,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:38,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:38,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:39,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:39,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015539159] [2021-11-19 14:09:39,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015539159] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:09:39,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:09:39,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:09:39,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405366257] [2021-11-19 14:09:39,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:39,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:09:39,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:09:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:09:39,145 INFO L87 Difference]: Start difference. First operand 296 states and 973 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) [2021-11-19 14:09:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:39,682 INFO L93 Difference]: Finished difference Result 418 states and 1320 transitions. [2021-11-19 14:09:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:39,683 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 24 [2021-11-19 14:09:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:39,684 INFO L225 Difference]: With dead ends: 418 [2021-11-19 14:09:39,684 INFO L226 Difference]: Without dead ends: 418 [2021-11-19 14:09:39,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:39,684 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:39,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:09:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-19 14:09:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 296. [2021-11-19 14:09:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.298305084745763) internal successors, (973), 295 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 973 transitions. [2021-11-19 14:09:39,691 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 973 transitions. Word has length 24 [2021-11-19 14:09:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:39,691 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 973 transitions. [2021-11-19 14:09:39,691 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) [2021-11-19 14:09:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 973 transitions. [2021-11-19 14:09:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:39,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:39,692 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:39,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:39,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:39,896 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:39,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1889138396, now seen corresponding path program 45 times [2021-11-19 14:09:39,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:39,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488727540] [2021-11-19 14:09:39,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:09:39,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:39,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:39,897 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:39,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-11-19 14:09:40,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:09:40,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:40,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:40,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:40,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:40,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:40,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488727540] [2021-11-19 14:09:40,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488727540] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:09:40,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:09:40,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:09:40,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770026187] [2021-11-19 14:09:40,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:40,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:09:40,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:09:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:09:40,810 INFO L87 Difference]: Start difference. First operand 296 states and 973 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) [2021-11-19 14:09:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:41,374 INFO L93 Difference]: Finished difference Result 408 states and 1306 transitions. [2021-11-19 14:09:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:41,375 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 24 [2021-11-19 14:09:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:41,376 INFO L225 Difference]: With dead ends: 408 [2021-11-19 14:09:41,376 INFO L226 Difference]: Without dead ends: 408 [2021-11-19 14:09:41,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:41,376 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:41,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:09:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-19 14:09:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 278. [2021-11-19 14:09:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.259927797833935) internal successors, (903), 277 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 903 transitions. [2021-11-19 14:09:41,382 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 903 transitions. Word has length 24 [2021-11-19 14:09:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:41,382 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 903 transitions. [2021-11-19 14:09:41,382 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) [2021-11-19 14:09:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 903 transitions. [2021-11-19 14:09:41,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:41,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:41,383 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:41,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:41,584 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1576403282, now seen corresponding path program 46 times [2021-11-19 14:09:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:41,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322581404] [2021-11-19 14:09:41,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:09:41,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:41,586 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:41,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2021-11-19 14:09:41,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:09:41,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:41,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:42,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:42,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:42,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322581404] [2021-11-19 14:09:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322581404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:42,549 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:42,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:09:42,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399346618] [2021-11-19 14:09:42,549 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:42,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:09:42,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:09:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:09:42,550 INFO L87 Difference]: Start difference. First operand 278 states and 903 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:43,529 INFO L93 Difference]: Finished difference Result 428 states and 1334 transitions. [2021-11-19 14:09:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:43,530 INFO L225 Difference]: With dead ends: 428 [2021-11-19 14:09:43,530 INFO L226 Difference]: Without dead ends: 428 [2021-11-19 14:09:43,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:43,531 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:43,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:09:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-19 14:09:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 286. [2021-11-19 14:09:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.3087719298245615) internal successors, (943), 285 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 943 transitions. [2021-11-19 14:09:43,537 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 943 transitions. Word has length 24 [2021-11-19 14:09:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:43,537 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 943 transitions. [2021-11-19 14:09:43,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 943 transitions. [2021-11-19 14:09:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:43,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:43,539 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:43,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:43,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:43,756 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1026384732, now seen corresponding path program 47 times [2021-11-19 14:09:43,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:43,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705977675] [2021-11-19 14:09:43,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:09:43,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:43,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:43,759 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:43,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2021-11-19 14:09:43,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:09:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:43,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:44,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:44,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:44,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705977675] [2021-11-19 14:09:44,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705977675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:44,601 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:44,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:09:44,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169975348] [2021-11-19 14:09:44,602 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:44,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:09:44,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:09:44,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:09:44,602 INFO L87 Difference]: Start difference. First operand 286 states and 943 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:45,531 INFO L93 Difference]: Finished difference Result 414 states and 1302 transitions. [2021-11-19 14:09:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:45,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:45,533 INFO L225 Difference]: With dead ends: 414 [2021-11-19 14:09:45,533 INFO L226 Difference]: Without dead ends: 414 [2021-11-19 14:09:45,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:45,533 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:45,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:09:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-19 14:09:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 282. [2021-11-19 14:09:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.2775800711743774) internal successors, (921), 281 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 921 transitions. [2021-11-19 14:09:45,541 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 921 transitions. Word has length 24 [2021-11-19 14:09:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:45,541 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 921 transitions. [2021-11-19 14:09:45,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 921 transitions. [2021-11-19 14:09:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:45,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:45,542 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:45,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:45,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:45,742 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:45,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2129745586, now seen corresponding path program 48 times [2021-11-19 14:09:45,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:45,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550178274] [2021-11-19 14:09:45,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:09:45,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:45,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:45,744 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:45,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-11-19 14:09:45,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:09:45,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:45,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:45,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:46,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:46,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:46,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550178274] [2021-11-19 14:09:46,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550178274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:46,497 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:46,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:09:46,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868368568] [2021-11-19 14:09:46,497 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:46,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:09:46,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:09:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:09:46,498 INFO L87 Difference]: Start difference. First operand 282 states and 921 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:47,285 INFO L93 Difference]: Finished difference Result 384 states and 1220 transitions. [2021-11-19 14:09:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:47,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:47,286 INFO L225 Difference]: With dead ends: 384 [2021-11-19 14:09:47,286 INFO L226 Difference]: Without dead ends: 384 [2021-11-19 14:09:47,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:47,287 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:47,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:09:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-19 14:09:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 284. [2021-11-19 14:09:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.2791519434628977) internal successors, (928), 283 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 928 transitions. [2021-11-19 14:09:47,292 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 928 transitions. Word has length 24 [2021-11-19 14:09:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:47,292 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 928 transitions. [2021-11-19 14:09:47,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 928 transitions. [2021-11-19 14:09:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:47,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:47,293 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:47,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:47,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:47,493 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:47,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1071499794, now seen corresponding path program 49 times [2021-11-19 14:09:47,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:47,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761832366] [2021-11-19 14:09:47,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:09:47,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:47,495 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:47,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2021-11-19 14:09:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:47,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:47,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:48,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:48,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761832366] [2021-11-19 14:09:48,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761832366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:48,592 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:48,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:09:48,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697851047] [2021-11-19 14:09:48,593 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:48,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:09:48,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:48,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:09:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:48,593 INFO L87 Difference]: Start difference. First operand 284 states and 928 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:49,791 INFO L93 Difference]: Finished difference Result 486 states and 1510 transitions. [2021-11-19 14:09:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:49,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:49,794 INFO L225 Difference]: With dead ends: 486 [2021-11-19 14:09:49,794 INFO L226 Difference]: Without dead ends: 480 [2021-11-19 14:09:49,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:09:49,795 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 134 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:49,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:09:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-19 14:09:49,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 302. [2021-11-19 14:09:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.3255813953488373) internal successors, (1001), 301 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1001 transitions. [2021-11-19 14:09:49,804 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1001 transitions. Word has length 24 [2021-11-19 14:09:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:49,804 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1001 transitions. [2021-11-19 14:09:49,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1001 transitions. [2021-11-19 14:09:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:49,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:49,805 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:49,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:50,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:50,006 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:50,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1642954600, now seen corresponding path program 50 times [2021-11-19 14:09:50,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:50,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789218508] [2021-11-19 14:09:50,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:09:50,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:50,008 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:50,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2021-11-19 14:09:50,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:09:50,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:50,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:50,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:50,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:51,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:51,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789218508] [2021-11-19 14:09:51,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789218508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:51,353 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:09:51,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224459037] [2021-11-19 14:09:51,354 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:51,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:09:51,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:09:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:51,354 INFO L87 Difference]: Start difference. First operand 302 states and 1001 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:52,550 INFO L93 Difference]: Finished difference Result 494 states and 1540 transitions. [2021-11-19 14:09:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:52,553 INFO L225 Difference]: With dead ends: 494 [2021-11-19 14:09:52,553 INFO L226 Difference]: Without dead ends: 494 [2021-11-19 14:09:52,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:09:52,553 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:52,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:09:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-19 14:09:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 300. [2021-11-19 14:09:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.331103678929766) internal successors, (996), 299 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 996 transitions. [2021-11-19 14:09:52,563 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 996 transitions. Word has length 24 [2021-11-19 14:09:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:52,563 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 996 transitions. [2021-11-19 14:09:52,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 996 transitions. [2021-11-19 14:09:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:52,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:52,564 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:52,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:52,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:52,765 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:52,765 INFO L85 PathProgramCache]: Analyzing trace with hash 536815388, now seen corresponding path program 51 times [2021-11-19 14:09:52,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:52,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013424131] [2021-11-19 14:09:52,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:09:52,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:52,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:52,766 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:52,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-11-19 14:09:52,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:09:52,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:09:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:53,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:53,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:53,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013424131] [2021-11-19 14:09:53,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013424131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:53,997 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:53,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:09:53,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780275922] [2021-11-19 14:09:53,997 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:53,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:09:53,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:53,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:09:53,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:53,998 INFO L87 Difference]: Start difference. First operand 300 states and 996 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:55,216 INFO L93 Difference]: Finished difference Result 466 states and 1469 transitions. [2021-11-19 14:09:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:55,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:55,218 INFO L225 Difference]: With dead ends: 466 [2021-11-19 14:09:55,218 INFO L226 Difference]: Without dead ends: 460 [2021-11-19 14:09:55,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:09:55,218 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:55,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:09:55,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-19 14:09:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 308. [2021-11-19 14:09:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.3550488599348536) internal successors, (1030), 307 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1030 transitions. [2021-11-19 14:09:55,226 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1030 transitions. Word has length 24 [2021-11-19 14:09:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:55,227 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 1030 transitions. [2021-11-19 14:09:55,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1030 transitions. [2021-11-19 14:09:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:55,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:55,228 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:55,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (114)] Ended with exit code 0 [2021-11-19 14:09:55,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:55,428 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:55,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1406768641, now seen corresponding path program 49 times [2021-11-19 14:09:55,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:55,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480050355] [2021-11-19 14:09:55,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:09:55,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:55,430 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:55,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2021-11-19 14:09:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:55,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:56,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:09:56,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:56,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480050355] [2021-11-19 14:09:56,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480050355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:56,945 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:56,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:09:56,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779663487] [2021-11-19 14:09:56,945 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:56,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:09:56,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:09:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:56,946 INFO L87 Difference]: Start difference. First operand 308 states and 1030 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:59,409 INFO L93 Difference]: Finished difference Result 482 states and 1544 transitions. [2021-11-19 14:09:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:09:59,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:09:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:59,411 INFO L225 Difference]: With dead ends: 482 [2021-11-19 14:09:59,412 INFO L226 Difference]: Without dead ends: 472 [2021-11-19 14:09:59,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:09:59,412 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:59,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:09:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-19 14:09:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 324. [2021-11-19 14:09:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.362229102167183) internal successors, (1086), 323 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) [2021-11-19 14:09:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1086 transitions. [2021-11-19 14:09:59,420 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1086 transitions. Word has length 24 [2021-11-19 14:09:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:59,420 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1086 transitions. [2021-11-19 14:09:59,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1086 transitions. [2021-11-19 14:09:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:09:59,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:59,421 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:59,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (115)] Ended with exit code 0 [2021-11-19 14:09:59,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:59,622 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:09:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash 174806485, now seen corresponding path program 50 times [2021-11-19 14:09:59,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:59,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788896957] [2021-11-19 14:09:59,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:09:59,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:59,623 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:59,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2021-11-19 14:09:59,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:09:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:09:59,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:09:59,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:00,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:01,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:01,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788896957] [2021-11-19 14:10:01,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788896957] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:10:01,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:10:01,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:10:01,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543697672] [2021-11-19 14:10:01,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:01,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:10:01,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:10:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:01,154 INFO L87 Difference]: Start difference. First operand 324 states and 1086 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) [2021-11-19 14:10:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:02,874 INFO L93 Difference]: Finished difference Result 524 states and 1644 transitions. [2021-11-19 14:10:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:10:02,875 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 24 [2021-11-19 14:10:02,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:02,876 INFO L225 Difference]: With dead ends: 524 [2021-11-19 14:10:02,876 INFO L226 Difference]: Without dead ends: 524 [2021-11-19 14:10:02,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:10:02,876 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:02,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:10:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-19 14:10:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 324. [2021-11-19 14:10:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.362229102167183) internal successors, (1086), 323 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) [2021-11-19 14:10:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1086 transitions. [2021-11-19 14:10:02,885 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1086 transitions. Word has length 24 [2021-11-19 14:10:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:02,885 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1086 transitions. [2021-11-19 14:10:02,885 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) [2021-11-19 14:10:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1086 transitions. [2021-11-19 14:10:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:02,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:02,886 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:02,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:03,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:03,086 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash -952589608, now seen corresponding path program 52 times [2021-11-19 14:10:03,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:03,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517179872] [2021-11-19 14:10:03,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:10:03,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:03,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:03,088 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:03,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-11-19 14:10:03,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:10:03,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:10:03,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:03,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:04,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:04,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517179872] [2021-11-19 14:10:04,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517179872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:04,100 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:04,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:10:04,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112034294] [2021-11-19 14:10:04,101 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:04,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:10:04,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:10:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:04,101 INFO L87 Difference]: Start difference. First operand 324 states and 1086 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:04,917 INFO L93 Difference]: Finished difference Result 482 states and 1543 transitions. [2021-11-19 14:10:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:10:04,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:10:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:04,919 INFO L225 Difference]: With dead ends: 482 [2021-11-19 14:10:04,919 INFO L226 Difference]: Without dead ends: 482 [2021-11-19 14:10:04,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:10:04,919 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:04,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:10:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-19 14:10:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 320. [2021-11-19 14:10:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.3699059561128526) internal successors, (1075), 319 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1075 transitions. [2021-11-19 14:10:04,926 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1075 transitions. Word has length 24 [2021-11-19 14:10:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:04,926 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1075 transitions. [2021-11-19 14:10:04,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1075 transitions. [2021-11-19 14:10:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:04,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:04,927 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:04,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (117)] Ended with exit code 0 [2021-11-19 14:10:05,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:05,128 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 204172317, now seen corresponding path program 51 times [2021-11-19 14:10:05,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:05,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909686595] [2021-11-19 14:10:05,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:10:05,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:05,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:05,130 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:05,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2021-11-19 14:10:05,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:10:05,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:05,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:05,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:05,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:06,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:06,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909686595] [2021-11-19 14:10:06,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909686595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:06,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:06,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:10:06,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874905621] [2021-11-19 14:10:06,677 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:06,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:10:06,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:10:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:06,677 INFO L87 Difference]: Start difference. First operand 320 states and 1075 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:09,355 INFO L93 Difference]: Finished difference Result 488 states and 1571 transitions. [2021-11-19 14:10:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:10:09,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:10:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:09,357 INFO L225 Difference]: With dead ends: 488 [2021-11-19 14:10:09,357 INFO L226 Difference]: Without dead ends: 484 [2021-11-19 14:10:09,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:10:09,358 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:09,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:10:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-19 14:10:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 324. [2021-11-19 14:10:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.371517027863777) internal successors, (1089), 323 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1089 transitions. [2021-11-19 14:10:09,368 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1089 transitions. Word has length 24 [2021-11-19 14:10:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:09,369 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1089 transitions. [2021-11-19 14:10:09,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1089 transitions. [2021-11-19 14:10:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:09,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:09,370 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:09,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:09,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:09,585 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:09,585 INFO L85 PathProgramCache]: Analyzing trace with hash -909210701, now seen corresponding path program 52 times [2021-11-19 14:10:09,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:09,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94988195] [2021-11-19 14:10:09,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:10:09,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:09,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:09,586 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:09,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2021-11-19 14:10:09,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:10:09,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:09,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:10,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:11,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:11,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94988195] [2021-11-19 14:10:11,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94988195] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:10:11,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:10:11,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:10:11,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788112909] [2021-11-19 14:10:11,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:11,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:10:11,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:11,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:10:11,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:11,300 INFO L87 Difference]: Start difference. First operand 324 states and 1089 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) [2021-11-19 14:10:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:14,386 INFO L93 Difference]: Finished difference Result 704 states and 2048 transitions. [2021-11-19 14:10:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:10:14,387 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 24 [2021-11-19 14:10:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:14,388 INFO L225 Difference]: With dead ends: 704 [2021-11-19 14:10:14,388 INFO L226 Difference]: Without dead ends: 704 [2021-11-19 14:10:14,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:10:14,389 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 115 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:14,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 0 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 14:10:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-19 14:10:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 322. [2021-11-19 14:10:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.3769470404984423) internal successors, (1084), 321 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:14,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1084 transitions. [2021-11-19 14:10:14,404 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1084 transitions. Word has length 24 [2021-11-19 14:10:14,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:14,405 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1084 transitions. [2021-11-19 14:10:14,405 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) [2021-11-19 14:10:14,405 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1084 transitions. [2021-11-19 14:10:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:14,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:14,406 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:14,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:14,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:14,620 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:14,621 INFO L85 PathProgramCache]: Analyzing trace with hash 19671295, now seen corresponding path program 53 times [2021-11-19 14:10:14,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:14,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050806687] [2021-11-19 14:10:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:10:14,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:14,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:14,622 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:14,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2021-11-19 14:10:14,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:10:14,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:14,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:14,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:15,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:16,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:16,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050806687] [2021-11-19 14:10:16,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050806687] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:10:16,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:10:16,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:10:16,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494020243] [2021-11-19 14:10:16,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:16,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:10:16,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:10:16,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:16,304 INFO L87 Difference]: Start difference. First operand 322 states and 1084 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) [2021-11-19 14:10:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:18,614 INFO L93 Difference]: Finished difference Result 644 states and 1931 transitions. [2021-11-19 14:10:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:10:18,616 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 24 [2021-11-19 14:10:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:18,617 INFO L225 Difference]: With dead ends: 644 [2021-11-19 14:10:18,617 INFO L226 Difference]: Without dead ends: 644 [2021-11-19 14:10:18,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:10:18,618 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:18,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:10:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-19 14:10:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 326. [2021-11-19 14:10:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.403076923076923) internal successors, (1106), 325 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1106 transitions. [2021-11-19 14:10:18,627 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1106 transitions. Word has length 24 [2021-11-19 14:10:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:18,627 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1106 transitions. [2021-11-19 14:10:18,627 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) [2021-11-19 14:10:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1106 transitions. [2021-11-19 14:10:18,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:18,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:18,628 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:18,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:18,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:18,829 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash 874977949, now seen corresponding path program 54 times [2021-11-19 14:10:18,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:18,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020490087] [2021-11-19 14:10:18,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:10:18,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:18,831 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:18,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2021-11-19 14:10:19,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:10:19,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:19,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:19,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:20,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:20,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020490087] [2021-11-19 14:10:20,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020490087] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:10:20,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:10:20,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:10:20,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113430170] [2021-11-19 14:10:20,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:20,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:10:20,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:10:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:20,767 INFO L87 Difference]: Start difference. First operand 326 states and 1106 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) [2021-11-19 14:10:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:22,992 INFO L93 Difference]: Finished difference Result 614 states and 1865 transitions. [2021-11-19 14:10:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:10:22,993 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 24 [2021-11-19 14:10:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:22,994 INFO L225 Difference]: With dead ends: 614 [2021-11-19 14:10:22,994 INFO L226 Difference]: Without dead ends: 614 [2021-11-19 14:10:22,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:10:22,995 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:22,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:10:22,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-19 14:10:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 322. [2021-11-19 14:10:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.3769470404984423) internal successors, (1084), 321 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1084 transitions. [2021-11-19 14:10:23,002 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1084 transitions. Word has length 24 [2021-11-19 14:10:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:23,002 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1084 transitions. [2021-11-19 14:10:23,003 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) [2021-11-19 14:10:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1084 transitions. [2021-11-19 14:10:23,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:23,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:23,004 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:23,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:23,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:23,208 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:23,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:23,208 INFO L85 PathProgramCache]: Analyzing trace with hash -569869220, now seen corresponding path program 53 times [2021-11-19 14:10:23,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:23,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169030411] [2021-11-19 14:10:23,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:10:23,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:23,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:23,209 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:23,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2021-11-19 14:10:23,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:10:23,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:23,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:10:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:23,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:24,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:24,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169030411] [2021-11-19 14:10:24,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169030411] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:24,499 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:24,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:10:24,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885792627] [2021-11-19 14:10:24,499 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:24,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:10:24,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:24,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:10:24,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:24,500 INFO L87 Difference]: Start difference. First operand 322 states and 1084 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:25,694 INFO L93 Difference]: Finished difference Result 522 states and 1666 transitions. [2021-11-19 14:10:25,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:10:25,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:10:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:25,696 INFO L225 Difference]: With dead ends: 522 [2021-11-19 14:10:25,696 INFO L226 Difference]: Without dead ends: 522 [2021-11-19 14:10:25,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:10:25,697 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:25,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:10:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-19 14:10:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 326. [2021-11-19 14:10:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.403076923076923) internal successors, (1106), 325 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1106 transitions. [2021-11-19 14:10:25,704 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1106 transitions. Word has length 24 [2021-11-19 14:10:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:25,704 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1106 transitions. [2021-11-19 14:10:25,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1106 transitions. [2021-11-19 14:10:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:25,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:25,705 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:25,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:25,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:25,906 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1487819410, now seen corresponding path program 54 times [2021-11-19 14:10:25,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:25,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943889531] [2021-11-19 14:10:25,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:10:25,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:25,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:25,907 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:25,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2021-11-19 14:10:26,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:10:26,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:26,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:10:26,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:26,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:27,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:27,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943889531] [2021-11-19 14:10:27,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943889531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:27,085 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:27,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:10:27,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270873178] [2021-11-19 14:10:27,086 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:27,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:10:27,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:10:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:27,087 INFO L87 Difference]: Start difference. First operand 326 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:28,007 INFO L93 Difference]: Finished difference Result 522 states and 1666 transitions. [2021-11-19 14:10:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:10:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:10:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:28,009 INFO L225 Difference]: With dead ends: 522 [2021-11-19 14:10:28,009 INFO L226 Difference]: Without dead ends: 522 [2021-11-19 14:10:28,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:10:28,009 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:28,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:10:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-19 14:10:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 320. [2021-11-19 14:10:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.3573667711598745) internal successors, (1071), 319 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:28,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1071 transitions. [2021-11-19 14:10:28,016 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1071 transitions. Word has length 24 [2021-11-19 14:10:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:28,016 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1071 transitions. [2021-11-19 14:10:28,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:28,017 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1071 transitions. [2021-11-19 14:10:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:28,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:28,017 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:28,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:28,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:28,218 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash -828964040, now seen corresponding path program 55 times [2021-11-19 14:10:28,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:28,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495266365] [2021-11-19 14:10:28,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:10:28,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:28,219 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:28,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2021-11-19 14:10:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:28,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:10:28,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:28,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:29,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:29,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495266365] [2021-11-19 14:10:29,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495266365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:29,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:29,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:10:29,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958773534] [2021-11-19 14:10:29,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:29,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:10:29,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:10:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:29,060 INFO L87 Difference]: Start difference. First operand 320 states and 1071 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:29,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:29,998 INFO L93 Difference]: Finished difference Result 446 states and 1423 transitions. [2021-11-19 14:10:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:10:29,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:10:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:29,999 INFO L225 Difference]: With dead ends: 446 [2021-11-19 14:10:29,999 INFO L226 Difference]: Without dead ends: 446 [2021-11-19 14:10:30,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:10:30,000 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:30,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:10:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-19 14:10:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 322. [2021-11-19 14:10:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.370716510903427) internal successors, (1082), 321 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1082 transitions. [2021-11-19 14:10:30,009 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1082 transitions. Word has length 24 [2021-11-19 14:10:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:30,009 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1082 transitions. [2021-11-19 14:10:30,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1082 transitions. [2021-11-19 14:10:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:30,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:30,011 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:30,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (124)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:30,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:30,224 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 270379100, now seen corresponding path program 56 times [2021-11-19 14:10:30,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:30,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122977325] [2021-11-19 14:10:30,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:10:30,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:30,225 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:30,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2021-11-19 14:10:30,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:10:30,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:30,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:10:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:30,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:31,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:31,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122977325] [2021-11-19 14:10:31,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122977325] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:31,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:31,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:10:31,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122932930] [2021-11-19 14:10:31,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:31,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:10:31,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:10:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:10:31,049 INFO L87 Difference]: Start difference. First operand 322 states and 1082 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:32,144 INFO L93 Difference]: Finished difference Result 440 states and 1423 transitions. [2021-11-19 14:10:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:10:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:10:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:32,146 INFO L225 Difference]: With dead ends: 440 [2021-11-19 14:10:32,146 INFO L226 Difference]: Without dead ends: 440 [2021-11-19 14:10:32,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:10:32,147 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:32,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:10:32,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-19 14:10:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 322. [2021-11-19 14:10:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.370716510903427) internal successors, (1082), 321 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1082 transitions. [2021-11-19 14:10:32,154 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1082 transitions. Word has length 24 [2021-11-19 14:10:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:32,155 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1082 transitions. [2021-11-19 14:10:32,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1082 transitions. [2021-11-19 14:10:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:32,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:32,155 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:32,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:32,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:32,356 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2030855409, now seen corresponding path program 55 times [2021-11-19 14:10:32,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:32,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30130023] [2021-11-19 14:10:32,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:10:32,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:32,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:32,359 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:32,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2021-11-19 14:10:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:32,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:32,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:33,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:33,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:33,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30130023] [2021-11-19 14:10:33,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30130023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:33,536 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:33,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:10:33,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752938196] [2021-11-19 14:10:33,536 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:33,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:10:33,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:10:33,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:33,537 INFO L87 Difference]: Start difference. First operand 322 states and 1082 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:35,558 INFO L93 Difference]: Finished difference Result 480 states and 1547 transitions. [2021-11-19 14:10:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:10:35,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:10:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:35,560 INFO L225 Difference]: With dead ends: 480 [2021-11-19 14:10:35,560 INFO L226 Difference]: Without dead ends: 476 [2021-11-19 14:10:35,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:10:35,561 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:35,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:10:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-19 14:10:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 330. [2021-11-19 14:10:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.3677811550151975) internal successors, (1108), 329 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1108 transitions. [2021-11-19 14:10:35,569 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1108 transitions. Word has length 24 [2021-11-19 14:10:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:35,569 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 1108 transitions. [2021-11-19 14:10:35,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1108 transitions. [2021-11-19 14:10:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:35,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:35,570 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:35,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:35,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:35,770 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:35,771 INFO L85 PathProgramCache]: Analyzing trace with hash 917472391, now seen corresponding path program 56 times [2021-11-19 14:10:35,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:35,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315225578] [2021-11-19 14:10:35,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:10:35,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:35,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:35,773 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:35,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2021-11-19 14:10:35,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:10:35,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:35,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:35,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:36,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:37,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:37,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315225578] [2021-11-19 14:10:37,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315225578] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:10:37,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:10:37,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:10:37,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356637637] [2021-11-19 14:10:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:37,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:10:37,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:10:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:37,222 INFO L87 Difference]: Start difference. First operand 330 states and 1108 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) [2021-11-19 14:10:39,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:39,204 INFO L93 Difference]: Finished difference Result 512 states and 1617 transitions. [2021-11-19 14:10:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:10:39,205 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 24 [2021-11-19 14:10:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:39,207 INFO L225 Difference]: With dead ends: 512 [2021-11-19 14:10:39,207 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 14:10:39,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:10:39,208 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:39,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:10:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 14:10:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 326. [2021-11-19 14:10:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.3661538461538463) internal successors, (1094), 325 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1094 transitions. [2021-11-19 14:10:39,220 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1094 transitions. Word has length 24 [2021-11-19 14:10:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:39,220 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1094 transitions. [2021-11-19 14:10:39,220 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) [2021-11-19 14:10:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1094 transitions. [2021-11-19 14:10:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:39,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:39,222 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:39,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:39,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:39,435 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1478959953, now seen corresponding path program 57 times [2021-11-19 14:10:39,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:39,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15614657] [2021-11-19 14:10:39,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:10:39,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:39,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:39,438 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:39,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2021-11-19 14:10:39,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:10:39,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:40,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:40,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:40,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15614657] [2021-11-19 14:10:40,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15614657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:40,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1790323724] [2021-11-19 14:10:40,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:10:40,587 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:10:40,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:10:40,597 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:10:40,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2021-11-19 14:10:40,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:10:40,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:40,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:41,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:41,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1790323724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:41,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773561264] [2021-11-19 14:10:41,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:10:41,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:10:41,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:10:41,505 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:10:41,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-11-19 14:10:41,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:10:41,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:41,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:10:41,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:42,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:42,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773561264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:42,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:10:42,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-19 14:10:42,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061177643] [2021-11-19 14:10:42,504 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:10:42,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:10:42,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:42,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:10:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:10:42,505 INFO L87 Difference]: Start difference. First operand 326 states and 1094 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:45,186 INFO L93 Difference]: Finished difference Result 536 states and 1675 transitions. [2021-11-19 14:10:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:10:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 14:10:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:45,188 INFO L225 Difference]: With dead ends: 536 [2021-11-19 14:10:45,188 INFO L226 Difference]: Without dead ends: 536 [2021-11-19 14:10:45,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:10:45,189 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:45,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 14:10:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-19 14:10:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 324. [2021-11-19 14:10:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.371517027863777) internal successors, (1089), 323 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1089 transitions. [2021-11-19 14:10:45,197 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1089 transitions. Word has length 24 [2021-11-19 14:10:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:45,197 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1089 transitions. [2021-11-19 14:10:45,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1089 transitions. [2021-11-19 14:10:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:45,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:45,198 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:45,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-11-19 14:10:45,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (129)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:45,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:45,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:45,800 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:45,801 INFO L85 PathProgramCache]: Analyzing trace with hash 245916533, now seen corresponding path program 58 times [2021-11-19 14:10:45,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:45,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392353148] [2021-11-19 14:10:45,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:10:45,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:45,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:45,803 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:45,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2021-11-19 14:10:45,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:10:45,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:45,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:46,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:46,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:47,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:47,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392353148] [2021-11-19 14:10:47,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392353148] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:47,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717337686] [2021-11-19 14:10:47,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:10:47,494 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:10:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:10:47,495 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:10:47,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (132)] Waiting until timeout for monitored process [2021-11-19 14:10:47,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:10:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:47,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:48,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:48,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [717337686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:48,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99805169] [2021-11-19 14:10:48,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:10:48,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:10:48,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:10:48,570 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:10:48,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-11-19 14:10:48,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:10:48,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:48,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:49,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:49,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99805169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:49,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:10:49,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-19 14:10:49,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868023752] [2021-11-19 14:10:49,449 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:10:49,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:10:49,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:10:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:49,450 INFO L87 Difference]: Start difference. First operand 324 states and 1089 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:51,068 INFO L93 Difference]: Finished difference Result 560 states and 1725 transitions. [2021-11-19 14:10:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:10:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 24 [2021-11-19 14:10:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:51,071 INFO L225 Difference]: With dead ends: 560 [2021-11-19 14:10:51,071 INFO L226 Difference]: Without dead ends: 560 [2021-11-19 14:10:51,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:10:51,071 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:51,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:10:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-19 14:10:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 324. [2021-11-19 14:10:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.362229102167183) internal successors, (1086), 323 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) [2021-11-19 14:10:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1086 transitions. [2021-11-19 14:10:51,080 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1086 transitions. Word has length 24 [2021-11-19 14:10:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:51,080 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1086 transitions. [2021-11-19 14:10:51,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1086 transitions. [2021-11-19 14:10:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:51,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:51,081 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:51,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:51,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (132)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:51,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (131)] Ended with exit code 0 [2021-11-19 14:10:51,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:51,682 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1101223187, now seen corresponding path program 59 times [2021-11-19 14:10:51,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:51,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995565423] [2021-11-19 14:10:51,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:10:51,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:51,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:51,685 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:51,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2021-11-19 14:10:51,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:10:51,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:52,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:53,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:53,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995565423] [2021-11-19 14:10:53,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995565423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:53,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [88916589] [2021-11-19 14:10:53,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:10:53,244 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:10:53,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:10:53,246 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:10:53,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (135)] Waiting until timeout for monitored process [2021-11-19 14:10:53,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:10:53,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:53,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:53,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:54,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:54,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [88916589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:54,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023904302] [2021-11-19 14:10:54,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:10:54,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:10:54,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:10:54,533 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:10:54,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-11-19 14:10:54,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:10:54,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:55,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:55,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023904302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:55,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:10:55,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-19 14:10:55,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60373461] [2021-11-19 14:10:55,605 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:10:55,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:10:55,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:10:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:55,605 INFO L87 Difference]: Start difference. First operand 324 states and 1086 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:57,334 INFO L93 Difference]: Finished difference Result 558 states and 1719 transitions. [2021-11-19 14:10:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:10:57,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 24 [2021-11-19 14:10:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:57,336 INFO L225 Difference]: With dead ends: 558 [2021-11-19 14:10:57,336 INFO L226 Difference]: Without dead ends: 558 [2021-11-19 14:10:57,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:10:57,337 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:57,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:10:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-19 14:10:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 320. [2021-11-19 14:10:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.335423197492163) internal successors, (1064), 319 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1064 transitions. [2021-11-19 14:10:57,344 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1064 transitions. Word has length 24 [2021-11-19 14:10:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:57,344 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1064 transitions. [2021-11-19 14:10:57,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:57,344 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1064 transitions. [2021-11-19 14:10:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:10:57,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:57,345 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:57,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (135)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:57,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (134)] Ended with exit code 0 [2021-11-19 14:10:57,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-11-19 14:10:57,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:10:57,946 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:10:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:57,946 INFO L85 PathProgramCache]: Analyzing trace with hash 400890951, now seen corresponding path program 60 times [2021-11-19 14:10:57,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:57,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048570996] [2021-11-19 14:10:57,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:10:57,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:57,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:57,948 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:57,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2021-11-19 14:10:58,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:10:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:58,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:58,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:58,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:10:59,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:59,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048570996] [2021-11-19 14:10:59,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048570996] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:10:59,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:10:59,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:10:59,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688074899] [2021-11-19 14:10:59,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:59,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:10:59,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:10:59,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:10:59,207 INFO L87 Difference]: Start difference. First operand 320 states and 1064 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) [2021-11-19 14:11:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:01,016 INFO L93 Difference]: Finished difference Result 534 states and 1640 transitions. [2021-11-19 14:11:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:11:01,017 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 24 [2021-11-19 14:11:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:01,018 INFO L225 Difference]: With dead ends: 534 [2021-11-19 14:11:01,018 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 14:11:01,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:11:01,019 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:01,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:11:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 14:11:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 312. [2021-11-19 14:11:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.347266881028939) internal successors, (1041), 311 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 1041 transitions. [2021-11-19 14:11:01,027 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 1041 transitions. Word has length 24 [2021-11-19 14:11:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:01,027 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 1041 transitions. [2021-11-19 14:11:01,027 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) [2021-11-19 14:11:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 1041 transitions. [2021-11-19 14:11:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:01,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:01,028 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:01,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (137)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:01,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:01,229 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:01,229 INFO L85 PathProgramCache]: Analyzing trace with hash -849970248, now seen corresponding path program 57 times [2021-11-19 14:11:01,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:01,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839088303] [2021-11-19 14:11:01,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:11:01,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:01,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:01,231 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:01,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2021-11-19 14:11:01,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:11:01,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:01,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:01,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:02,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:02,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839088303] [2021-11-19 14:11:02,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839088303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:02,551 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:02,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:02,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538964333] [2021-11-19 14:11:02,552 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:02,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:02,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:02,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:02,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:02,552 INFO L87 Difference]: Start difference. First operand 312 states and 1041 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:03,779 INFO L93 Difference]: Finished difference Result 496 states and 1582 transitions. [2021-11-19 14:11:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:03,781 INFO L225 Difference]: With dead ends: 496 [2021-11-19 14:11:03,781 INFO L226 Difference]: Without dead ends: 496 [2021-11-19 14:11:03,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:11:03,782 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:03,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:11:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-19 14:11:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 314. [2021-11-19 14:11:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3482428115015974) internal successors, (1048), 313 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1048 transitions. [2021-11-19 14:11:03,789 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1048 transitions. Word has length 24 [2021-11-19 14:11:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:03,790 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1048 transitions. [2021-11-19 14:11:03,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1048 transitions. [2021-11-19 14:11:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:03,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:03,791 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:03,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (138)] Ended with exit code 0 [2021-11-19 14:11:03,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:03,991 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1767920438, now seen corresponding path program 58 times [2021-11-19 14:11:03,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:03,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521809922] [2021-11-19 14:11:03,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:11:03,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:03,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:03,993 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:03,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2021-11-19 14:11:04,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:11:04,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:04,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:05,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:05,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521809922] [2021-11-19 14:11:05,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521809922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:05,176 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:05,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:05,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003148040] [2021-11-19 14:11:05,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:05,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:05,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:05,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:05,177 INFO L87 Difference]: Start difference. First operand 314 states and 1048 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:06,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:06,286 INFO L93 Difference]: Finished difference Result 474 states and 1536 transitions. [2021-11-19 14:11:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:06,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:06,288 INFO L225 Difference]: With dead ends: 474 [2021-11-19 14:11:06,288 INFO L226 Difference]: Without dead ends: 474 [2021-11-19 14:11:06,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:11:06,289 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:06,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:11:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-19 14:11:06,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 300. [2021-11-19 14:11:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.331103678929766) internal successors, (996), 299 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 996 transitions. [2021-11-19 14:11:06,295 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 996 transitions. Word has length 24 [2021-11-19 14:11:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:06,295 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 996 transitions. [2021-11-19 14:11:06,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 996 transitions. [2021-11-19 14:11:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:06,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:06,296 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:06,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (139)] Ended with exit code 0 [2021-11-19 14:11:06,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:06,496 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:06,497 INFO L85 PathProgramCache]: Analyzing trace with hash -823712488, now seen corresponding path program 59 times [2021-11-19 14:11:06,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:06,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002875821] [2021-11-19 14:11:06,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:11:06,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:06,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:06,499 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:06,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2021-11-19 14:11:06,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:11:06,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:06,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:07,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:07,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:07,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002875821] [2021-11-19 14:11:07,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002875821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:07,487 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:07,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:11:07,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736456770] [2021-11-19 14:11:07,487 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:07,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:11:07,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:07,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:11:07,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:11:07,488 INFO L87 Difference]: Start difference. First operand 300 states and 996 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:08,272 INFO L93 Difference]: Finished difference Result 462 states and 1478 transitions. [2021-11-19 14:11:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:08,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:08,273 INFO L225 Difference]: With dead ends: 462 [2021-11-19 14:11:08,273 INFO L226 Difference]: Without dead ends: 462 [2021-11-19 14:11:08,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:11:08,274 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:08,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:11:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-19 14:11:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 292. [2021-11-19 14:11:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.3058419243986252) internal successors, (962), 291 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) [2021-11-19 14:11:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 962 transitions. [2021-11-19 14:11:08,279 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 962 transitions. Word has length 24 [2021-11-19 14:11:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:08,279 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 962 transitions. [2021-11-19 14:11:08,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 962 transitions. [2021-11-19 14:11:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:08,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:08,280 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:08,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (140)] Ended with exit code 0 [2021-11-19 14:11:08,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:08,484 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash 852899000, now seen corresponding path program 60 times [2021-11-19 14:11:08,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:08,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930895055] [2021-11-19 14:11:08,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:11:08,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:08,486 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:08,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2021-11-19 14:11:08,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:11:08,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:08,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:08,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:08,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:09,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:09,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930895055] [2021-11-19 14:11:09,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930895055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:09,532 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:09,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:11:09,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006020785] [2021-11-19 14:11:09,533 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:09,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:11:09,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:09,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:11:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:11:09,534 INFO L87 Difference]: Start difference. First operand 292 states and 962 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:10,537 INFO L93 Difference]: Finished difference Result 520 states and 1563 transitions. [2021-11-19 14:11:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:10,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:10,539 INFO L225 Difference]: With dead ends: 520 [2021-11-19 14:11:10,539 INFO L226 Difference]: Without dead ends: 506 [2021-11-19 14:11:10,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:11:10,540 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:10,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:11:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-19 14:11:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 300. [2021-11-19 14:11:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.317725752508361) internal successors, (992), 299 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 992 transitions. [2021-11-19 14:11:10,547 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 992 transitions. Word has length 24 [2021-11-19 14:11:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:10,548 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 992 transitions. [2021-11-19 14:11:10,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 992 transitions. [2021-11-19 14:11:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:10,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:10,549 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:10,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (141)] Ended with exit code 0 [2021-11-19 14:11:10,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:10,752 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -251695692, now seen corresponding path program 61 times [2021-11-19 14:11:10,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:10,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121224346] [2021-11-19 14:11:10,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:11:10,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:10,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:10,755 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:10,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2021-11-19 14:11:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:11,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:11,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:11,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121224346] [2021-11-19 14:11:11,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121224346] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:11,842 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:11,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:11,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414273240] [2021-11-19 14:11:11,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:11,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:11,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:11,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:11,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:11,843 INFO L87 Difference]: Start difference. First operand 300 states and 992 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:12,895 INFO L93 Difference]: Finished difference Result 532 states and 1585 transitions. [2021-11-19 14:11:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:12,897 INFO L225 Difference]: With dead ends: 532 [2021-11-19 14:11:12,897 INFO L226 Difference]: Without dead ends: 526 [2021-11-19 14:11:12,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:11:12,898 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:12,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:11:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-19 14:11:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 310. [2021-11-19 14:11:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.29126213592233) internal successors, (1017), 309 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1017 transitions. [2021-11-19 14:11:12,904 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1017 transitions. Word has length 24 [2021-11-19 14:11:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:12,905 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1017 transitions. [2021-11-19 14:11:12,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1017 transitions. [2021-11-19 14:11:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:12,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:12,906 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:12,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (142)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:13,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:13,106 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash -823150498, now seen corresponding path program 62 times [2021-11-19 14:11:13,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:13,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439137645] [2021-11-19 14:11:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:11:13,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:13,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:13,108 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:13,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2021-11-19 14:11:13,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:11:13,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:13,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:14,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:14,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439137645] [2021-11-19 14:11:14,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439137645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:14,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:14,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:14,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527052145] [2021-11-19 14:11:14,304 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:14,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:14,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:14,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:14,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:14,305 INFO L87 Difference]: Start difference. First operand 310 states and 1017 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:15,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:15,532 INFO L93 Difference]: Finished difference Result 512 states and 1556 transitions. [2021-11-19 14:11:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:15,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:15,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:15,534 INFO L225 Difference]: With dead ends: 512 [2021-11-19 14:11:15,534 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 14:11:15,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:11:15,535 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:15,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:11:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 14:11:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 296. [2021-11-19 14:11:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.3322033898305086) internal successors, (983), 295 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 983 transitions. [2021-11-19 14:11:15,542 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 983 transitions. Word has length 24 [2021-11-19 14:11:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:15,542 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 983 transitions. [2021-11-19 14:11:15,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 983 transitions. [2021-11-19 14:11:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:15,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:15,543 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:15,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (143)] Ended with exit code 0 [2021-11-19 14:11:15,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:15,743 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash -828937910, now seen corresponding path program 63 times [2021-11-19 14:11:15,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:15,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416704578] [2021-11-19 14:11:15,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:11:15,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:15,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:15,745 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:15,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2021-11-19 14:11:15,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:11:15,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:16,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:16,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:16,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416704578] [2021-11-19 14:11:16,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416704578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:16,754 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:16,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:11:16,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547369798] [2021-11-19 14:11:16,755 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:16,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:11:16,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:11:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:11:16,755 INFO L87 Difference]: Start difference. First operand 296 states and 983 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:17,710 INFO L93 Difference]: Finished difference Result 480 states and 1475 transitions. [2021-11-19 14:11:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:17,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:17,712 INFO L225 Difference]: With dead ends: 480 [2021-11-19 14:11:17,713 INFO L226 Difference]: Without dead ends: 466 [2021-11-19 14:11:17,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:11:17,713 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:17,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:11:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-19 14:11:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 302. [2021-11-19 14:11:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.3156146179401995) internal successors, (998), 301 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 998 transitions. [2021-11-19 14:11:17,719 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 998 transitions. Word has length 24 [2021-11-19 14:11:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:17,719 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 998 transitions. [2021-11-19 14:11:17,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 998 transitions. [2021-11-19 14:11:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:17,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:17,720 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:17,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (144)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:17,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:17,921 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash -325217420, now seen corresponding path program 64 times [2021-11-19 14:11:17,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:17,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806571285] [2021-11-19 14:11:17,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:11:17,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:17,922 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:17,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2021-11-19 14:11:18,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:11:18,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:18,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:18,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:18,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:19,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:19,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806571285] [2021-11-19 14:11:19,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806571285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:19,052 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:19,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:19,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468495820] [2021-11-19 14:11:19,052 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:19,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:19,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:19,053 INFO L87 Difference]: Start difference. First operand 302 states and 998 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:20,150 INFO L93 Difference]: Finished difference Result 502 states and 1530 transitions. [2021-11-19 14:11:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:20,152 INFO L225 Difference]: With dead ends: 502 [2021-11-19 14:11:20,152 INFO L226 Difference]: Without dead ends: 496 [2021-11-19 14:11:20,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:11:20,153 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:20,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:11:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-19 14:11:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 316. [2021-11-19 14:11:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.311111111111111) internal successors, (1043), 315 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1043 transitions. [2021-11-19 14:11:20,159 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1043 transitions. Word has length 24 [2021-11-19 14:11:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:20,159 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 1043 transitions. [2021-11-19 14:11:20,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1043 transitions. [2021-11-19 14:11:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:20,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:20,160 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:20,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (145)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:20,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:20,361 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2026165847, now seen corresponding path program 61 times [2021-11-19 14:11:20,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:20,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316793893] [2021-11-19 14:11:20,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:11:20,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:20,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:20,362 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:20,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2021-11-19 14:11:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:11:20,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:20,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:21,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:21,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316793893] [2021-11-19 14:11:21,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316793893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:21,353 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:21,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:21,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163439702] [2021-11-19 14:11:21,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:21,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:21,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:21,354 INFO L87 Difference]: Start difference. First operand 316 states and 1043 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:23,012 INFO L93 Difference]: Finished difference Result 508 states and 1624 transitions. [2021-11-19 14:11:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:11:23,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:23,013 INFO L225 Difference]: With dead ends: 508 [2021-11-19 14:11:23,013 INFO L226 Difference]: Without dead ends: 490 [2021-11-19 14:11:23,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:11:23,014 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 180 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:23,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 0 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:11:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-19 14:11:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 338. [2021-11-19 14:11:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.311572700296736) internal successors, (1116), 337 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1116 transitions. [2021-11-19 14:11:23,020 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1116 transitions. Word has length 24 [2021-11-19 14:11:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:23,020 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1116 transitions. [2021-11-19 14:11:23,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1116 transitions. [2021-11-19 14:11:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:23,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:23,021 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:23,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (146)] Ended with exit code 0 [2021-11-19 14:11:23,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:23,222 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash -687226323, now seen corresponding path program 62 times [2021-11-19 14:11:23,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:23,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655185126] [2021-11-19 14:11:23,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:11:23,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:23,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:23,223 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:23,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2021-11-19 14:11:23,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:11:23,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:23,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:11:23,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:23,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:24,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:24,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655185126] [2021-11-19 14:11:24,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655185126] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:11:24,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:11:24,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:11:24,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619113850] [2021-11-19 14:11:24,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:24,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:11:24,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:24,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:11:24,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:24,354 INFO L87 Difference]: Start difference. First operand 338 states and 1116 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) [2021-11-19 14:11:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:25,453 INFO L93 Difference]: Finished difference Result 426 states and 1409 transitions. [2021-11-19 14:11:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:25,454 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 24 [2021-11-19 14:11:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:25,456 INFO L225 Difference]: With dead ends: 426 [2021-11-19 14:11:25,456 INFO L226 Difference]: Without dead ends: 426 [2021-11-19 14:11:25,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:11:25,457 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:25,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:11:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-19 14:11:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 338. [2021-11-19 14:11:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.311572700296736) internal successors, (1116), 337 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1116 transitions. [2021-11-19 14:11:25,469 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1116 transitions. Word has length 24 [2021-11-19 14:11:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:25,469 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1116 transitions. [2021-11-19 14:11:25,469 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) [2021-11-19 14:11:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1116 transitions. [2021-11-19 14:11:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:25,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:25,471 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:25,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (147)] Ended with exit code 0 [2021-11-19 14:11:25,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:25,686 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1814622416, now seen corresponding path program 65 times [2021-11-19 14:11:25,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:25,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118211696] [2021-11-19 14:11:25,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:11:25,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:25,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:25,688 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:25,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2021-11-19 14:11:25,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:11:25,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:25,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:25,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:26,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:26,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:26,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118211696] [2021-11-19 14:11:26,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118211696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:26,861 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:26,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:26,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891066075] [2021-11-19 14:11:26,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:26,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:26,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:26,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:26,863 INFO L87 Difference]: Start difference. First operand 338 states and 1116 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:27,951 INFO L93 Difference]: Finished difference Result 468 states and 1500 transitions. [2021-11-19 14:11:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:27,952 INFO L225 Difference]: With dead ends: 468 [2021-11-19 14:11:27,953 INFO L226 Difference]: Without dead ends: 468 [2021-11-19 14:11:27,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:11:27,953 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:27,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:11:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-19 14:11:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 324. [2021-11-19 14:11:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.328173374613003) internal successors, (1075), 323 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1075 transitions. [2021-11-19 14:11:27,959 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1075 transitions. Word has length 24 [2021-11-19 14:11:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:27,959 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1075 transitions. [2021-11-19 14:11:27,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1075 transitions. [2021-11-19 14:11:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:27,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:27,960 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:27,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (148)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:28,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:28,161 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1544791255, now seen corresponding path program 63 times [2021-11-19 14:11:28,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:28,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996217942] [2021-11-19 14:11:28,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:11:28,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:28,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:28,162 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:28,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2021-11-19 14:11:28,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:11:28,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:28,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:11:28,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:28,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:28,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:28,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996217942] [2021-11-19 14:11:28,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996217942] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:11:28,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:11:28,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:11:28,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009886568] [2021-11-19 14:11:28,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:28,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:11:28,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:28,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:11:28,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:11:28,923 INFO L87 Difference]: Start difference. First operand 324 states and 1075 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) [2021-11-19 14:11:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:29,836 INFO L93 Difference]: Finished difference Result 438 states and 1440 transitions. [2021-11-19 14:11:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:29,837 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 24 [2021-11-19 14:11:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:29,837 INFO L225 Difference]: With dead ends: 438 [2021-11-19 14:11:29,837 INFO L226 Difference]: Without dead ends: 438 [2021-11-19 14:11:29,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:11:29,838 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:29,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:11:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-19 14:11:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 318. [2021-11-19 14:11:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.3438485804416405) internal successors, (1060), 317 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:29,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 1060 transitions. [2021-11-19 14:11:29,843 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 1060 transitions. Word has length 24 [2021-11-19 14:11:29,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:29,844 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 1060 transitions. [2021-11-19 14:11:29,844 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) [2021-11-19 14:11:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 1060 transitions. [2021-11-19 14:11:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:29,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:29,844 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:29,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (149)] Ended with exit code 0 [2021-11-19 14:11:30,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:30,045 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1816229686, now seen corresponding path program 66 times [2021-11-19 14:11:30,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:30,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005032934] [2021-11-19 14:11:30,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:11:30,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:30,046 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:30,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2021-11-19 14:11:30,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:11:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:30,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:30,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:31,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:31,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005032934] [2021-11-19 14:11:31,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005032934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:31,376 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:31,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:31,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210633748] [2021-11-19 14:11:31,377 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:31,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:31,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:31,377 INFO L87 Difference]: Start difference. First operand 318 states and 1060 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:32,468 INFO L93 Difference]: Finished difference Result 566 states and 1741 transitions. [2021-11-19 14:11:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:32,470 INFO L225 Difference]: With dead ends: 566 [2021-11-19 14:11:32,470 INFO L226 Difference]: Without dead ends: 560 [2021-11-19 14:11:32,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:11:32,471 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:32,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:11:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-19 14:11:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 332. [2021-11-19 14:11:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.3564954682779455) internal successors, (1111), 331 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1111 transitions. [2021-11-19 14:11:32,478 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1111 transitions. Word has length 24 [2021-11-19 14:11:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:32,478 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1111 transitions. [2021-11-19 14:11:32,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1111 transitions. [2021-11-19 14:11:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:32,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:32,479 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:32,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (150)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:32,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:32,679 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1907282804, now seen corresponding path program 67 times [2021-11-19 14:11:32,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:32,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104403644] [2021-11-19 14:11:32,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:11:32,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:32,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:32,681 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:32,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2021-11-19 14:11:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:32,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:32,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:33,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:34,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:34,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104403644] [2021-11-19 14:11:34,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104403644] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:34,020 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:34,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:34,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267142632] [2021-11-19 14:11:34,020 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:34,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:34,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:34,022 INFO L87 Difference]: Start difference. First operand 332 states and 1111 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:35,409 INFO L93 Difference]: Finished difference Result 570 states and 1761 transitions. [2021-11-19 14:11:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:35,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:35,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:35,412 INFO L225 Difference]: With dead ends: 570 [2021-11-19 14:11:35,412 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 14:11:35,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:11:35,412 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:35,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:11:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 14:11:35,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 330. [2021-11-19 14:11:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.3617021276595747) internal successors, (1106), 329 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1106 transitions. [2021-11-19 14:11:35,420 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1106 transitions. Word has length 24 [2021-11-19 14:11:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:35,420 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 1106 transitions. [2021-11-19 14:11:35,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1106 transitions. [2021-11-19 14:11:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:35,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:35,421 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:35,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (151)] Ended with exit code 0 [2021-11-19 14:11:35,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:35,621 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash -207914504, now seen corresponding path program 68 times [2021-11-19 14:11:35,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:35,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741130249] [2021-11-19 14:11:35,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:11:35,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:35,623 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:35,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2021-11-19 14:11:35,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:11:35,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:35,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:35,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:36,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:36,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:36,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741130249] [2021-11-19 14:11:36,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741130249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:36,949 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:36,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:36,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422114442] [2021-11-19 14:11:36,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:36,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:36,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:36,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:36,950 INFO L87 Difference]: Start difference. First operand 330 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:38,173 INFO L93 Difference]: Finished difference Result 552 states and 1712 transitions. [2021-11-19 14:11:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:38,175 INFO L225 Difference]: With dead ends: 552 [2021-11-19 14:11:38,175 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:11:38,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:11:38,175 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:38,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:11:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:11:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 338. [2021-11-19 14:11:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.3827893175074184) internal successors, (1140), 337 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1140 transitions. [2021-11-19 14:11:38,183 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1140 transitions. Word has length 24 [2021-11-19 14:11:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:38,183 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1140 transitions. [2021-11-19 14:11:38,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:38,183 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1140 transitions. [2021-11-19 14:11:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:38,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:38,184 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:38,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (152)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:38,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:38,384 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2143468763, now seen corresponding path program 64 times [2021-11-19 14:11:38,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:38,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935213349] [2021-11-19 14:11:38,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:11:38,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:38,386 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:38,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2021-11-19 14:11:38,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:11:38,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:38,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:11:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:39,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:39,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:39,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935213349] [2021-11-19 14:11:39,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935213349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:39,723 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:39,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:39,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807020210] [2021-11-19 14:11:39,723 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:39,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:39,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:39,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:39,724 INFO L87 Difference]: Start difference. First operand 338 states and 1140 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:41,774 INFO L93 Difference]: Finished difference Result 546 states and 1774 transitions. [2021-11-19 14:11:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:11:41,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:41,776 INFO L225 Difference]: With dead ends: 546 [2021-11-19 14:11:41,776 INFO L226 Difference]: Without dead ends: 536 [2021-11-19 14:11:41,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:11:41,776 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 142 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:41,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 0 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:11:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-19 14:11:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 346. [2021-11-19 14:11:41,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.4) internal successors, (1173), 345 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1173 transitions. [2021-11-19 14:11:41,783 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1173 transitions. Word has length 24 [2021-11-19 14:11:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:41,783 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1173 transitions. [2021-11-19 14:11:41,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1173 transitions. [2021-11-19 14:11:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:41,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:41,784 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:41,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (153)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:41,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:41,985 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:41,985 INFO L85 PathProgramCache]: Analyzing trace with hash -569923407, now seen corresponding path program 65 times [2021-11-19 14:11:41,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:41,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305468902] [2021-11-19 14:11:41,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:11:41,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:41,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:41,986 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:41,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2021-11-19 14:11:42,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:11:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:11:42,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:42,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:43,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:43,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305468902] [2021-11-19 14:11:43,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305468902] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:11:43,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:11:43,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:11:43,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125814473] [2021-11-19 14:11:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:43,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:11:43,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:43,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:11:43,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:43,351 INFO L87 Difference]: Start difference. First operand 346 states and 1173 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) [2021-11-19 14:11:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:44,857 INFO L93 Difference]: Finished difference Result 604 states and 1857 transitions. [2021-11-19 14:11:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:11:44,858 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 24 [2021-11-19 14:11:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:44,859 INFO L225 Difference]: With dead ends: 604 [2021-11-19 14:11:44,859 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 14:11:44,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:11:44,859 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:44,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:11:44,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 14:11:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 342. [2021-11-19 14:11:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.3841642228739004) internal successors, (1154), 341 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1154 transitions. [2021-11-19 14:11:44,867 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1154 transitions. Word has length 24 [2021-11-19 14:11:44,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:44,867 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1154 transitions. [2021-11-19 14:11:44,867 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) [2021-11-19 14:11:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1154 transitions. [2021-11-19 14:11:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:44,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:44,868 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:44,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (154)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:45,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:45,068 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:45,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1697319500, now seen corresponding path program 69 times [2021-11-19 14:11:45,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:45,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209873407] [2021-11-19 14:11:45,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:11:45,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:45,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:45,070 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:45,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2021-11-19 14:11:45,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:11:45,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:11:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:45,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:46,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:46,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209873407] [2021-11-19 14:11:46,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209873407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:46,253 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:46,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:46,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617614768] [2021-11-19 14:11:46,253 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:46,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:46,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:46,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:46,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:46,254 INFO L87 Difference]: Start difference. First operand 342 states and 1154 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:47,394 INFO L93 Difference]: Finished difference Result 550 states and 1727 transitions. [2021-11-19 14:11:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:47,395 INFO L225 Difference]: With dead ends: 550 [2021-11-19 14:11:47,395 INFO L226 Difference]: Without dead ends: 550 [2021-11-19 14:11:47,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:11:47,396 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:47,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:11:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-19 14:11:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 338. [2021-11-19 14:11:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.391691394658754) internal successors, (1143), 337 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1143 transitions. [2021-11-19 14:11:47,403 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1143 transitions. Word has length 24 [2021-11-19 14:11:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:47,403 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1143 transitions. [2021-11-19 14:11:47,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1143 transitions. [2021-11-19 14:11:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:47,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:47,404 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:47,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (155)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:47,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:47,608 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:47,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:47,608 INFO L85 PathProgramCache]: Analyzing trace with hash -540557575, now seen corresponding path program 66 times [2021-11-19 14:11:47,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:47,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624862833] [2021-11-19 14:11:47,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:11:47,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:47,610 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:47,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2021-11-19 14:11:47,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:11:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:47,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:11:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:48,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:49,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:49,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624862833] [2021-11-19 14:11:49,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624862833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:49,009 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:49,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:11:49,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428091083] [2021-11-19 14:11:49,009 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:49,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:49,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:49,010 INFO L87 Difference]: Start difference. First operand 338 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:51,068 INFO L93 Difference]: Finished difference Result 550 states and 1761 transitions. [2021-11-19 14:11:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:11:51,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:11:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:51,070 INFO L225 Difference]: With dead ends: 550 [2021-11-19 14:11:51,070 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:11:51,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:11:51,070 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:51,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 0 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:11:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:11:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 342. [2021-11-19 14:11:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.3929618768328447) internal successors, (1157), 341 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1157 transitions. [2021-11-19 14:11:51,078 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1157 transitions. Word has length 24 [2021-11-19 14:11:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:51,078 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1157 transitions. [2021-11-19 14:11:51,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1157 transitions. [2021-11-19 14:11:51,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:51,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:51,079 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:51,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (156)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:51,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:51,279 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1653940593, now seen corresponding path program 67 times [2021-11-19 14:11:51,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:51,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833797554] [2021-11-19 14:11:51,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:11:51,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:51,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:51,281 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:51,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2021-11-19 14:11:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:11:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:51,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:52,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:52,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833797554] [2021-11-19 14:11:52,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833797554] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:11:52,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:11:52,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:11:52,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86132461] [2021-11-19 14:11:52,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:52,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:11:52,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:11:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:52,800 INFO L87 Difference]: Start difference. First operand 342 states and 1157 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) [2021-11-19 14:11:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:54,140 INFO L93 Difference]: Finished difference Result 518 states and 1668 transitions. [2021-11-19 14:11:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:54,141 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 24 [2021-11-19 14:11:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:54,142 INFO L225 Difference]: With dead ends: 518 [2021-11-19 14:11:54,142 INFO L226 Difference]: Without dead ends: 518 [2021-11-19 14:11:54,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:11:54,142 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:54,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:11:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-19 14:11:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 340. [2021-11-19 14:11:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.398230088495575) internal successors, (1152), 339 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1152 transitions. [2021-11-19 14:11:54,149 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1152 transitions. Word has length 24 [2021-11-19 14:11:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:54,149 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1152 transitions. [2021-11-19 14:11:54,149 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) [2021-11-19 14:11:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1152 transitions. [2021-11-19 14:11:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:54,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:54,150 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:54,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (157)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:54,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:54,350 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash -725058597, now seen corresponding path program 68 times [2021-11-19 14:11:54,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:54,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133474639] [2021-11-19 14:11:54,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:11:54,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:54,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:54,352 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:54,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2021-11-19 14:11:54,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:11:54,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:54,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:11:54,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:55,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:56,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:56,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133474639] [2021-11-19 14:11:56,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133474639] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:11:56,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:11:56,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:11:56,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344422780] [2021-11-19 14:11:56,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:56,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:11:56,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:56,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:11:56,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:56,031 INFO L87 Difference]: Start difference. First operand 340 states and 1152 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) [2021-11-19 14:11:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:57,538 INFO L93 Difference]: Finished difference Result 568 states and 1790 transitions. [2021-11-19 14:11:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:57,539 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 24 [2021-11-19 14:11:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:57,540 INFO L225 Difference]: With dead ends: 568 [2021-11-19 14:11:57,540 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 14:11:57,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:11:57,540 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:57,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:11:57,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 14:11:57,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2021-11-19 14:11:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.422740524781341) internal successors, (1174), 343 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1174 transitions. [2021-11-19 14:11:57,547 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1174 transitions. Word has length 24 [2021-11-19 14:11:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:57,547 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1174 transitions. [2021-11-19 14:11:57,547 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) [2021-11-19 14:11:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1174 transitions. [2021-11-19 14:11:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:11:57,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:57,548 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:57,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (158)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:57,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:57,748 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:11:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash 130248057, now seen corresponding path program 69 times [2021-11-19 14:11:57,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:57,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183155063] [2021-11-19 14:11:57,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:11:57,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:57,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:57,750 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:57,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2021-11-19 14:11:57,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:11:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:11:57,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:11:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:58,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:11:59,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:59,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183155063] [2021-11-19 14:11:59,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183155063] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:11:59,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:11:59,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:11:59,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693102968] [2021-11-19 14:11:59,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:59,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:11:59,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:59,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:11:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:59,627 INFO L87 Difference]: Start difference. First operand 344 states and 1174 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) [2021-11-19 14:12:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:01,301 INFO L93 Difference]: Finished difference Result 540 states and 1730 transitions. [2021-11-19 14:12:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:01,302 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 24 [2021-11-19 14:12:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:01,303 INFO L225 Difference]: With dead ends: 540 [2021-11-19 14:12:01,303 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 14:12:01,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:12:01,303 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:01,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 14:12:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 340. [2021-11-19 14:12:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.398230088495575) internal successors, (1152), 339 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1152 transitions. [2021-11-19 14:12:01,311 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1152 transitions. Word has length 24 [2021-11-19 14:12:01,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:01,311 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1152 transitions. [2021-11-19 14:12:01,311 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) [2021-11-19 14:12:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1152 transitions. [2021-11-19 14:12:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:01,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:01,312 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:01,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (159)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:01,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:01,512 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1314599112, now seen corresponding path program 70 times [2021-11-19 14:12:01,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:01,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057514837] [2021-11-19 14:12:01,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:12:01,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:01,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:01,514 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:01,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2021-11-19 14:12:01,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:12:01,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:01,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:01,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:02,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:03,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:03,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057514837] [2021-11-19 14:12:03,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057514837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:03,143 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:03,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:03,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25646387] [2021-11-19 14:12:03,143 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:03,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:03,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:03,143 INFO L87 Difference]: Start difference. First operand 340 states and 1152 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:04,332 INFO L93 Difference]: Finished difference Result 536 states and 1688 transitions. [2021-11-19 14:12:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:04,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:04,334 INFO L225 Difference]: With dead ends: 536 [2021-11-19 14:12:04,334 INFO L226 Difference]: Without dead ends: 536 [2021-11-19 14:12:04,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:12:04,334 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:04,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-19 14:12:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 340. [2021-11-19 14:12:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.398230088495575) internal successors, (1152), 339 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1152 transitions. [2021-11-19 14:12:04,341 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1152 transitions. Word has length 24 [2021-11-19 14:12:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:04,341 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1152 transitions. [2021-11-19 14:12:04,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1152 transitions. [2021-11-19 14:12:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:04,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:04,342 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:04,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (160)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:04,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:04,543 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2062417994, now seen corresponding path program 71 times [2021-11-19 14:12:04,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:04,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909769477] [2021-11-19 14:12:04,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:12:04,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:04,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:04,544 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:04,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2021-11-19 14:12:04,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:12:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:04,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:04,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:05,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:05,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:05,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909769477] [2021-11-19 14:12:05,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909769477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:05,847 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:05,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:05,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223457943] [2021-11-19 14:12:05,847 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:05,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:05,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:05,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:05,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:05,848 INFO L87 Difference]: Start difference. First operand 340 states and 1152 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:06,947 INFO L93 Difference]: Finished difference Result 522 states and 1664 transitions. [2021-11-19 14:12:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:06,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:06,949 INFO L225 Difference]: With dead ends: 522 [2021-11-19 14:12:06,949 INFO L226 Difference]: Without dead ends: 522 [2021-11-19 14:12:06,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:12:06,949 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:06,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:12:06,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-19 14:12:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 324. [2021-11-19 14:12:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.365325077399381) internal successors, (1087), 323 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1087 transitions. [2021-11-19 14:12:06,957 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1087 transitions. Word has length 24 [2021-11-19 14:12:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:06,957 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1087 transitions. [2021-11-19 14:12:06,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1087 transitions. [2021-11-19 14:12:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:06,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:06,958 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:06,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (161)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:07,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:07,158 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:07,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1030567661, now seen corresponding path program 70 times [2021-11-19 14:12:07,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:07,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407912156] [2021-11-19 14:12:07,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:12:07,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:07,160 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:07,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (162)] Waiting until timeout for monitored process [2021-11-19 14:12:07,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:12:07,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:07,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:08,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:08,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407912156] [2021-11-19 14:12:08,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407912156] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:12:08,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:12:08,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:12:08,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761606318] [2021-11-19 14:12:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:08,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:12:08,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:08,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:12:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:12:08,085 INFO L87 Difference]: Start difference. First operand 324 states and 1087 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) [2021-11-19 14:12:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:09,454 INFO L93 Difference]: Finished difference Result 590 states and 1873 transitions. [2021-11-19 14:12:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:09,455 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 24 [2021-11-19 14:12:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:09,456 INFO L225 Difference]: With dead ends: 590 [2021-11-19 14:12:09,456 INFO L226 Difference]: Without dead ends: 590 [2021-11-19 14:12:09,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:12:09,457 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:09,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-19 14:12:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 332. [2021-11-19 14:12:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.3867069486404833) internal successors, (1121), 331 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1121 transitions. [2021-11-19 14:12:09,465 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1121 transitions. Word has length 24 [2021-11-19 14:12:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:09,466 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1121 transitions. [2021-11-19 14:12:09,466 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) [2021-11-19 14:12:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1121 transitions. [2021-11-19 14:12:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:09,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:09,467 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:09,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (162)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:09,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:09,667 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:09,668 INFO L85 PathProgramCache]: Analyzing trace with hash -251990415, now seen corresponding path program 71 times [2021-11-19 14:12:09,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:09,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934402428] [2021-11-19 14:12:09,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:12:09,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:09,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:09,669 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:09,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (163)] Waiting until timeout for monitored process [2021-11-19 14:12:09,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:12:09,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:09,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:09,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:10,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:11,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:11,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934402428] [2021-11-19 14:12:11,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934402428] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:12:11,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:12:11,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:12:11,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169489051] [2021-11-19 14:12:11,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:11,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:12:11,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:11,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:12:11,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:11,100 INFO L87 Difference]: Start difference. First operand 332 states and 1121 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) [2021-11-19 14:12:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:13,005 INFO L93 Difference]: Finished difference Result 556 states and 1785 transitions. [2021-11-19 14:12:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:13,006 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 24 [2021-11-19 14:12:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:13,007 INFO L225 Difference]: With dead ends: 556 [2021-11-19 14:12:13,007 INFO L226 Difference]: Without dead ends: 556 [2021-11-19 14:12:13,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:12:13,008 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:13,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:12:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-19 14:12:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 336. [2021-11-19 14:12:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4119402985074627) internal successors, (1143), 335 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1143 transitions. [2021-11-19 14:12:13,016 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1143 transitions. Word has length 24 [2021-11-19 14:12:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:13,017 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1143 transitions. [2021-11-19 14:12:13,017 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) [2021-11-19 14:12:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1143 transitions. [2021-11-19 14:12:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:13,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:13,018 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:13,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (163)] Ended with exit code 0 [2021-11-19 14:12:13,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:13,220 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash 603316239, now seen corresponding path program 72 times [2021-11-19 14:12:13,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:13,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88230452] [2021-11-19 14:12:13,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:12:13,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:13,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:13,222 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:13,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2021-11-19 14:12:13,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:12:13,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:13,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:13,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:13,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:14,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:14,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88230452] [2021-11-19 14:12:14,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88230452] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:12:14,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:12:14,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:12:14,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790236744] [2021-11-19 14:12:14,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:14,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:12:14,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:12:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:14,797 INFO L87 Difference]: Start difference. First operand 336 states and 1143 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) [2021-11-19 14:12:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:16,511 INFO L93 Difference]: Finished difference Result 524 states and 1715 transitions. [2021-11-19 14:12:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:16,512 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 24 [2021-11-19 14:12:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:16,513 INFO L225 Difference]: With dead ends: 524 [2021-11-19 14:12:16,513 INFO L226 Difference]: Without dead ends: 524 [2021-11-19 14:12:16,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:12:16,514 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:16,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:12:16,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-19 14:12:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 320. [2021-11-19 14:12:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.341692789968652) internal successors, (1066), 319 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1066 transitions. [2021-11-19 14:12:16,520 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1066 transitions. Word has length 24 [2021-11-19 14:12:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:16,521 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1066 transitions. [2021-11-19 14:12:16,521 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) [2021-11-19 14:12:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1066 transitions. [2021-11-19 14:12:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:16,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:16,521 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:16,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (164)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:16,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:16,722 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1359246914, now seen corresponding path program 72 times [2021-11-19 14:12:16,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:16,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816624853] [2021-11-19 14:12:16,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:12:16,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:16,725 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:16,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (165)] Waiting until timeout for monitored process [2021-11-19 14:12:16,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:12:16,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:16,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:16,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:17,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:17,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:17,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816624853] [2021-11-19 14:12:17,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816624853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:17,663 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:17,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:12:17,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436117943] [2021-11-19 14:12:17,663 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:17,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:12:17,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:17,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:12:17,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:12:17,663 INFO L87 Difference]: Start difference. First operand 320 states and 1066 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:18,587 INFO L93 Difference]: Finished difference Result 412 states and 1295 transitions. [2021-11-19 14:12:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:18,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:18,588 INFO L225 Difference]: With dead ends: 412 [2021-11-19 14:12:18,588 INFO L226 Difference]: Without dead ends: 412 [2021-11-19 14:12:18,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:12:18,589 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:18,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:12:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-19 14:12:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 314. [2021-11-19 14:12:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3610223642172525) internal successors, (1052), 313 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1052 transitions. [2021-11-19 14:12:18,594 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1052 transitions. Word has length 24 [2021-11-19 14:12:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:18,595 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1052 transitions. [2021-11-19 14:12:18,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:18,595 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1052 transitions. [2021-11-19 14:12:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:18,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:18,595 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:18,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (165)] Ended with exit code 0 [2021-11-19 14:12:18,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:18,796 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1538335542, now seen corresponding path program 73 times [2021-11-19 14:12:18,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:18,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351489726] [2021-11-19 14:12:18,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:12:18,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:18,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:18,797 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:18,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (166)] Waiting until timeout for monitored process [2021-11-19 14:12:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:18,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:19,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:19,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:19,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351489726] [2021-11-19 14:12:19,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351489726] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:19,658 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:19,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:12:19,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831966503] [2021-11-19 14:12:19,658 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:19,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:12:19,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:12:19,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:12:19,659 INFO L87 Difference]: Start difference. First operand 314 states and 1052 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:20,530 INFO L93 Difference]: Finished difference Result 434 states and 1330 transitions. [2021-11-19 14:12:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:20,531 INFO L225 Difference]: With dead ends: 434 [2021-11-19 14:12:20,532 INFO L226 Difference]: Without dead ends: 428 [2021-11-19 14:12:20,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:12:20,532 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:20,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:12:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-19 14:12:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 328. [2021-11-19 14:12:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.330275229357798) internal successors, (1089), 327 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1089 transitions. [2021-11-19 14:12:20,538 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1089 transitions. Word has length 24 [2021-11-19 14:12:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:20,538 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1089 transitions. [2021-11-19 14:12:20,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1089 transitions. [2021-11-19 14:12:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:20,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:20,539 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:20,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (166)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:20,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:20,740 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2109790348, now seen corresponding path program 74 times [2021-11-19 14:12:20,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:20,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420699588] [2021-11-19 14:12:20,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:12:20,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:20,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:20,741 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:20,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2021-11-19 14:12:20,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:12:20,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:21,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:21,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:21,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420699588] [2021-11-19 14:12:21,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420699588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:21,557 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:21,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:12:21,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998442035] [2021-11-19 14:12:21,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:21,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:12:21,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:21,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:12:21,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:12:21,558 INFO L87 Difference]: Start difference. First operand 328 states and 1089 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:22,513 INFO L93 Difference]: Finished difference Result 432 states and 1333 transitions. [2021-11-19 14:12:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:22,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:22,515 INFO L225 Difference]: With dead ends: 432 [2021-11-19 14:12:22,515 INFO L226 Difference]: Without dead ends: 432 [2021-11-19 14:12:22,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:12:22,515 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:22,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:12:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-19 14:12:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 326. [2021-11-19 14:12:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.335384615384615) internal successors, (1084), 325 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1084 transitions. [2021-11-19 14:12:22,522 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1084 transitions. Word has length 24 [2021-11-19 14:12:22,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:22,522 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1084 transitions. [2021-11-19 14:12:22,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1084 transitions. [2021-11-19 14:12:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:22,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:22,523 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:22,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (167)] Ended with exit code 0 [2021-11-19 14:12:22,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:22,723 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1010447208, now seen corresponding path program 75 times [2021-11-19 14:12:22,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:22,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401543658] [2021-11-19 14:12:22,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:12:22,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:22,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:22,725 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:22,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2021-11-19 14:12:22,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:12:22,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:22,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:22,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:23,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:23,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:23,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401543658] [2021-11-19 14:12:23,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401543658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:23,386 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:23,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:12:23,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623980005] [2021-11-19 14:12:23,386 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:23,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:12:23,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:23,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:12:23,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:12:23,387 INFO L87 Difference]: Start difference. First operand 326 states and 1084 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:24,394 INFO L93 Difference]: Finished difference Result 416 states and 1306 transitions. [2021-11-19 14:12:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:24,396 INFO L225 Difference]: With dead ends: 416 [2021-11-19 14:12:24,396 INFO L226 Difference]: Without dead ends: 416 [2021-11-19 14:12:24,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:12:24,397 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:24,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:12:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-19 14:12:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 314. [2021-11-19 14:12:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3610223642172525) internal successors, (1052), 313 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1052 transitions. [2021-11-19 14:12:24,402 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1052 transitions. Word has length 24 [2021-11-19 14:12:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:24,402 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1052 transitions. [2021-11-19 14:12:24,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1052 transitions. [2021-11-19 14:12:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:24,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:24,403 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:24,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (168)] Ended with exit code 0 [2021-11-19 14:12:24,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:24,604 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash 686727636, now seen corresponding path program 76 times [2021-11-19 14:12:24,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:24,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330495696] [2021-11-19 14:12:24,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:12:24,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:24,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:24,605 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:24,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (169)] Waiting until timeout for monitored process [2021-11-19 14:12:24,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:12:24,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:25,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:25,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:25,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330495696] [2021-11-19 14:12:25,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330495696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:25,735 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:25,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:25,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687592285] [2021-11-19 14:12:25,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:25,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:25,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:25,736 INFO L87 Difference]: Start difference. First operand 314 states and 1052 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:26,781 INFO L93 Difference]: Finished difference Result 550 states and 1698 transitions. [2021-11-19 14:12:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:26,783 INFO L225 Difference]: With dead ends: 550 [2021-11-19 14:12:26,783 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 14:12:26,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:12:26,783 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:26,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:12:26,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 14:12:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 330. [2021-11-19 14:12:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.386018237082067) internal successors, (1114), 329 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1114 transitions. [2021-11-19 14:12:26,790 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1114 transitions. Word has length 24 [2021-11-19 14:12:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:26,790 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 1114 transitions. [2021-11-19 14:12:26,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1114 transitions. [2021-11-19 14:12:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:26,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:26,791 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:26,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (169)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:26,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:26,992 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash 115272830, now seen corresponding path program 77 times [2021-11-19 14:12:26,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:26,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417917608] [2021-11-19 14:12:26,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:12:26,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:26,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:26,993 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:26,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2021-11-19 14:12:27,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:12:27,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:27,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:27,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:28,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:28,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417917608] [2021-11-19 14:12:28,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417917608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:28,171 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:28,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:28,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757793523] [2021-11-19 14:12:28,172 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:28,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:28,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:28,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:28,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:28,172 INFO L87 Difference]: Start difference. First operand 330 states and 1114 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:29,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:29,376 INFO L93 Difference]: Finished difference Result 554 states and 1718 transitions. [2021-11-19 14:12:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:29,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:29,378 INFO L225 Difference]: With dead ends: 554 [2021-11-19 14:12:29,378 INFO L226 Difference]: Without dead ends: 554 [2021-11-19 14:12:29,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:12:29,378 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:29,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-19 14:12:29,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 328. [2021-11-19 14:12:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.3914373088685017) internal successors, (1109), 327 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1109 transitions. [2021-11-19 14:12:29,385 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1109 transitions. Word has length 24 [2021-11-19 14:12:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:29,386 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1109 transitions. [2021-11-19 14:12:29,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1109 transitions. [2021-11-19 14:12:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:29,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:29,387 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:29,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (170)] Ended with exit code 0 [2021-11-19 14:12:29,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:29,591 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:29,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1999924478, now seen corresponding path program 78 times [2021-11-19 14:12:29,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:29,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227699764] [2021-11-19 14:12:29,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:12:29,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:29,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:29,592 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:29,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (171)] Waiting until timeout for monitored process [2021-11-19 14:12:29,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:12:29,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:29,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:30,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:30,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:30,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227699764] [2021-11-19 14:12:30,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227699764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:30,722 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:30,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:30,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099818081] [2021-11-19 14:12:30,722 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:30,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:30,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:30,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:30,722 INFO L87 Difference]: Start difference. First operand 328 states and 1109 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:31,960 INFO L93 Difference]: Finished difference Result 532 states and 1662 transitions. [2021-11-19 14:12:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:31,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:31,962 INFO L225 Difference]: With dead ends: 532 [2021-11-19 14:12:31,962 INFO L226 Difference]: Without dead ends: 526 [2021-11-19 14:12:31,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:12:31,962 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:31,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-19 14:12:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 336. [2021-11-19 14:12:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4119402985074627) internal successors, (1143), 335 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1143 transitions. [2021-11-19 14:12:31,969 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1143 transitions. Word has length 24 [2021-11-19 14:12:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:31,969 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1143 transitions. [2021-11-19 14:12:31,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1143 transitions. [2021-11-19 14:12:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:31,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:31,970 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:31,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (171)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:32,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:32,176 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash 351458789, now seen corresponding path program 73 times [2021-11-19 14:12:32,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:32,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054932662] [2021-11-19 14:12:32,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:12:32,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:32,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:32,178 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:32,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2021-11-19 14:12:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:32,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:32,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:32,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:33,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:33,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054932662] [2021-11-19 14:12:33,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054932662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:33,426 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:33,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:33,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867468368] [2021-11-19 14:12:33,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:33,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:33,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:33,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:33,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:33,427 INFO L87 Difference]: Start difference. First operand 336 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:35,146 INFO L93 Difference]: Finished difference Result 482 states and 1581 transitions. [2021-11-19 14:12:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:12:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:35,147 INFO L225 Difference]: With dead ends: 482 [2021-11-19 14:12:35,147 INFO L226 Difference]: Without dead ends: 472 [2021-11-19 14:12:35,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:12:35,148 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 160 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:35,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 0 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-19 14:12:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 346. [2021-11-19 14:12:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.4405797101449274) internal successors, (1187), 345 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1187 transitions. [2021-11-19 14:12:35,154 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1187 transitions. Word has length 24 [2021-11-19 14:12:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:35,154 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1187 transitions. [2021-11-19 14:12:35,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1187 transitions. [2021-11-19 14:12:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:35,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:35,155 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:35,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (172)] Ended with exit code 0 [2021-11-19 14:12:35,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:35,356 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1933033915, now seen corresponding path program 74 times [2021-11-19 14:12:35,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:35,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316878814] [2021-11-19 14:12:35,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:12:35,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:35,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:35,358 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:35,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2021-11-19 14:12:35,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:12:35,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:35,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:36,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:36,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:36,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316878814] [2021-11-19 14:12:36,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316878814] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:12:36,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:12:36,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:12:36,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675841877] [2021-11-19 14:12:36,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:36,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:12:36,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:36,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:12:36,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:36,679 INFO L87 Difference]: Start difference. First operand 346 states and 1187 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) [2021-11-19 14:12:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:37,991 INFO L93 Difference]: Finished difference Result 500 states and 1616 transitions. [2021-11-19 14:12:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:37,991 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 24 [2021-11-19 14:12:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:37,992 INFO L225 Difference]: With dead ends: 500 [2021-11-19 14:12:37,992 INFO L226 Difference]: Without dead ends: 500 [2021-11-19 14:12:37,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:12:37,993 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:37,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:12:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-19 14:12:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 342. [2021-11-19 14:12:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.4252199413489737) internal successors, (1168), 341 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1168 transitions. [2021-11-19 14:12:37,999 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1168 transitions. Word has length 24 [2021-11-19 14:12:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:37,999 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1168 transitions. [2021-11-19 14:12:37,999 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) [2021-11-19 14:12:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1168 transitions. [2021-11-19 14:12:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:38,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:38,000 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:38,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (173)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:38,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:38,200 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash 805637822, now seen corresponding path program 79 times [2021-11-19 14:12:38,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:38,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662446932] [2021-11-19 14:12:38,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:12:38,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:38,202 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:38,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2021-11-19 14:12:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:38,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:38,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:38,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:39,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:39,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662446932] [2021-11-19 14:12:39,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662446932] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:39,233 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:39,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:39,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427571993] [2021-11-19 14:12:39,233 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:39,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:39,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:39,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:39,234 INFO L87 Difference]: Start difference. First operand 342 states and 1168 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:40,209 INFO L93 Difference]: Finished difference Result 532 states and 1688 transitions. [2021-11-19 14:12:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:40,211 INFO L225 Difference]: With dead ends: 532 [2021-11-19 14:12:40,211 INFO L226 Difference]: Without dead ends: 532 [2021-11-19 14:12:40,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:12:40,211 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:40,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:12:40,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-19 14:12:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 338. [2021-11-19 14:12:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.4332344213649852) internal successors, (1157), 337 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1157 transitions. [2021-11-19 14:12:40,219 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1157 transitions. Word has length 24 [2021-11-19 14:12:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:40,219 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1157 transitions. [2021-11-19 14:12:40,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1157 transitions. [2021-11-19 14:12:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:40,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:40,220 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:40,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (174)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:40,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:40,420 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1962399747, now seen corresponding path program 75 times [2021-11-19 14:12:40,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:40,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275385838] [2021-11-19 14:12:40,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:12:40,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:40,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:40,422 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:40,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2021-11-19 14:12:40,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:12:40,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:41,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:41,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:41,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275385838] [2021-11-19 14:12:41,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275385838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:41,783 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:41,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:41,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762874319] [2021-11-19 14:12:41,783 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:41,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:41,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:41,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:41,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:41,784 INFO L87 Difference]: Start difference. First operand 338 states and 1157 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:43,625 INFO L93 Difference]: Finished difference Result 488 states and 1608 transitions. [2021-11-19 14:12:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:12:43,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:43,627 INFO L225 Difference]: With dead ends: 488 [2021-11-19 14:12:43,627 INFO L226 Difference]: Without dead ends: 484 [2021-11-19 14:12:43,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:12:43,627 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 123 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:43,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 0 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-19 14:12:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 342. [2021-11-19 14:12:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.434017595307918) internal successors, (1171), 341 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1171 transitions. [2021-11-19 14:12:43,633 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1171 transitions. Word has length 24 [2021-11-19 14:12:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:43,633 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1171 transitions. [2021-11-19 14:12:43,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:43,634 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1171 transitions. [2021-11-19 14:12:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:43,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:43,634 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:43,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (175)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:43,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:43,835 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash 849016729, now seen corresponding path program 76 times [2021-11-19 14:12:43,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:43,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351691833] [2021-11-19 14:12:43,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:12:43,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:43,836 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:43,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2021-11-19 14:12:43,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:12:43,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:43,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:43,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:44,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:45,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:45,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351691833] [2021-11-19 14:12:45,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351691833] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:12:45,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:12:45,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:12:45,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988088425] [2021-11-19 14:12:45,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:45,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:12:45,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:12:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:45,215 INFO L87 Difference]: Start difference. First operand 342 states and 1171 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) [2021-11-19 14:12:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:47,002 INFO L93 Difference]: Finished difference Result 568 states and 1773 transitions. [2021-11-19 14:12:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:12:47,003 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 24 [2021-11-19 14:12:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:47,004 INFO L225 Difference]: With dead ends: 568 [2021-11-19 14:12:47,005 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 14:12:47,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:12:47,005 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:47,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:12:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 14:12:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 338. [2021-11-19 14:12:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.4332344213649852) internal successors, (1157), 337 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1157 transitions. [2021-11-19 14:12:47,012 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1157 transitions. Word has length 24 [2021-11-19 14:12:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:47,012 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1157 transitions. [2021-11-19 14:12:47,012 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) [2021-11-19 14:12:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1157 transitions. [2021-11-19 14:12:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:47,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:47,013 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:47,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (176)] Ended with exit code 0 [2021-11-19 14:12:47,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:47,213 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1777898725, now seen corresponding path program 77 times [2021-11-19 14:12:47,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:47,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628139008] [2021-11-19 14:12:47,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:12:47,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:47,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:47,215 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:47,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2021-11-19 14:12:47,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:12:47,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:47,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:48,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:48,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628139008] [2021-11-19 14:12:48,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628139008] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:12:48,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:12:48,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:12:48,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101795714] [2021-11-19 14:12:48,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:48,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:12:48,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:48,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:12:48,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:48,687 INFO L87 Difference]: Start difference. First operand 338 states and 1157 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) [2021-11-19 14:12:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:50,190 INFO L93 Difference]: Finished difference Result 572 states and 1795 transitions. [2021-11-19 14:12:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:50,191 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 24 [2021-11-19 14:12:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:50,192 INFO L225 Difference]: With dead ends: 572 [2021-11-19 14:12:50,192 INFO L226 Difference]: Without dead ends: 572 [2021-11-19 14:12:50,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:12:50,193 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:50,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-19 14:12:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 342. [2021-11-19 14:12:50,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.4574780058651027) internal successors, (1179), 341 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1179 transitions. [2021-11-19 14:12:50,201 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1179 transitions. Word has length 24 [2021-11-19 14:12:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:50,201 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1179 transitions. [2021-11-19 14:12:50,201 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) [2021-11-19 14:12:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1179 transitions. [2021-11-19 14:12:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:50,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:50,202 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:50,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (177)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:50,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:50,402 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1661761917, now seen corresponding path program 78 times [2021-11-19 14:12:50,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:50,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816790528] [2021-11-19 14:12:50,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:12:50,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:50,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:50,404 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:50,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2021-11-19 14:12:50,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:12:50,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:50,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:50,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:51,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:51,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:51,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816790528] [2021-11-19 14:12:51,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816790528] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:12:51,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:12:51,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:12:51,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095142607] [2021-11-19 14:12:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:51,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:12:51,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:12:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:51,982 INFO L87 Difference]: Start difference. First operand 342 states and 1179 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) [2021-11-19 14:12:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:53,527 INFO L93 Difference]: Finished difference Result 542 states and 1729 transitions. [2021-11-19 14:12:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:53,528 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 24 [2021-11-19 14:12:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:53,529 INFO L225 Difference]: With dead ends: 542 [2021-11-19 14:12:53,529 INFO L226 Difference]: Without dead ends: 542 [2021-11-19 14:12:53,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:12:53,529 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:53,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:12:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-19 14:12:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 336. [2021-11-19 14:12:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4149253731343285) internal successors, (1144), 335 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1144 transitions. [2021-11-19 14:12:53,535 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1144 transitions. Word has length 24 [2021-11-19 14:12:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:53,536 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1144 transitions. [2021-11-19 14:12:53,536 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) [2021-11-19 14:12:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1144 transitions. [2021-11-19 14:12:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:53,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:53,536 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:53,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (178)] Ended with exit code 0 [2021-11-19 14:12:53,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:53,737 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1188358210, now seen corresponding path program 80 times [2021-11-19 14:12:53,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:53,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116919533] [2021-11-19 14:12:53,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:12:53,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:53,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:53,738 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:53,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2021-11-19 14:12:53,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:12:53,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:53,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:54,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:55,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:55,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116919533] [2021-11-19 14:12:55,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116919533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:55,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:55,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:55,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979688104] [2021-11-19 14:12:55,086 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:55,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:55,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:55,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:55,087 INFO L87 Difference]: Start difference. First operand 336 states and 1144 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:55,958 INFO L93 Difference]: Finished difference Result 574 states and 1794 transitions. [2021-11-19 14:12:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:55,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:55,959 INFO L225 Difference]: With dead ends: 574 [2021-11-19 14:12:55,959 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:12:55,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:12:55,960 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:55,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:12:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:12:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 340. [2021-11-19 14:12:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.43952802359882) internal successors, (1166), 339 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1166 transitions. [2021-11-19 14:12:55,967 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1166 transitions. Word has length 24 [2021-11-19 14:12:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:55,967 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1166 transitions. [2021-11-19 14:12:55,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1166 transitions. [2021-11-19 14:12:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:55,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:55,967 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:55,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (179)] Ended with exit code 0 [2021-11-19 14:12:56,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:56,168 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash 270408020, now seen corresponding path program 81 times [2021-11-19 14:12:56,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:56,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532788449] [2021-11-19 14:12:56,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:12:56,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:56,169 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:56,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2021-11-19 14:12:56,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:12:56,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:56,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:56,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:56,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:57,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:57,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532788449] [2021-11-19 14:12:57,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532788449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:57,315 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:57,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:57,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416917943] [2021-11-19 14:12:57,315 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:57,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:57,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:57,316 INFO L87 Difference]: Start difference. First operand 340 states and 1166 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:58,155 INFO L93 Difference]: Finished difference Result 574 states and 1794 transitions. [2021-11-19 14:12:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:58,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:12:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:58,157 INFO L225 Difference]: With dead ends: 574 [2021-11-19 14:12:58,157 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:12:58,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:12:58,157 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:58,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:12:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:12:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 334. [2021-11-19 14:12:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.3963963963963963) internal successors, (1131), 333 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1131 transitions. [2021-11-19 14:12:58,168 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1131 transitions. Word has length 24 [2021-11-19 14:12:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:58,168 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1131 transitions. [2021-11-19 14:12:58,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1131 transitions. [2021-11-19 14:12:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:12:58,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:58,169 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:58,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (180)] Ended with exit code 0 [2021-11-19 14:12:58,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:58,382 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:12:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash 929263390, now seen corresponding path program 82 times [2021-11-19 14:12:58,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:58,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493700453] [2021-11-19 14:12:58,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:12:58,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:58,383 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:58,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2021-11-19 14:12:58,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:12:58,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:58,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:12:58,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:58,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:12:59,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:59,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493700453] [2021-11-19 14:12:59,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493700453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:59,262 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:59,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:12:59,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893837094] [2021-11-19 14:12:59,262 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:59,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:12:59,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:12:59,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:12:59,262 INFO L87 Difference]: Start difference. First operand 334 states and 1131 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:00,181 INFO L93 Difference]: Finished difference Result 534 states and 1661 transitions. [2021-11-19 14:13:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:00,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:13:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:00,183 INFO L225 Difference]: With dead ends: 534 [2021-11-19 14:13:00,183 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 14:13:00,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:13:00,184 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:00,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:13:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 14:13:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 336. [2021-11-19 14:13:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.408955223880597) internal successors, (1142), 335 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1142 transitions. [2021-11-19 14:13:00,190 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1142 transitions. Word has length 24 [2021-11-19 14:13:00,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:00,191 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1142 transitions. [2021-11-19 14:13:00,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1142 transitions. [2021-11-19 14:13:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:00,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:00,191 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:00,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (181)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:00,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:00,392 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2028606530, now seen corresponding path program 83 times [2021-11-19 14:13:00,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:00,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465061839] [2021-11-19 14:13:00,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:13:00,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:00,393 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:00,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2021-11-19 14:13:00,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:13:00,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:00,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:13:00,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:00,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:01,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:01,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465061839] [2021-11-19 14:13:01,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465061839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:01,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:13:01,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:13:01,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998126298] [2021-11-19 14:13:01,140 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:01,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:13:01,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:13:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:13:01,140 INFO L87 Difference]: Start difference. First operand 336 states and 1142 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:01,940 INFO L93 Difference]: Finished difference Result 532 states and 1671 transitions. [2021-11-19 14:13:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:13:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:01,942 INFO L225 Difference]: With dead ends: 532 [2021-11-19 14:13:01,942 INFO L226 Difference]: Without dead ends: 532 [2021-11-19 14:13:01,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:13:01,942 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:01,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:13:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-19 14:13:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 334. [2021-11-19 14:13:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.4144144144144146) internal successors, (1137), 333 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1137 transitions. [2021-11-19 14:13:01,948 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1137 transitions. Word has length 24 [2021-11-19 14:13:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:01,949 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1137 transitions. [2021-11-19 14:13:01,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1137 transitions. [2021-11-19 14:13:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:01,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:01,949 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:01,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (182)] Ended with exit code 0 [2021-11-19 14:13:02,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:02,150 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:02,150 INFO L85 PathProgramCache]: Analyzing trace with hash -505884457, now seen corresponding path program 79 times [2021-11-19 14:13:02,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:02,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100841677] [2021-11-19 14:13:02,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:13:02,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:02,151 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:02,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2021-11-19 14:13:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:02,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:02,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:03,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:03,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100841677] [2021-11-19 14:13:03,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100841677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:03,091 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:13:03,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:13:03,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671648226] [2021-11-19 14:13:03,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:03,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:13:03,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:13:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:13:03,092 INFO L87 Difference]: Start difference. First operand 334 states and 1137 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:04,466 INFO L93 Difference]: Finished difference Result 452 states and 1490 transitions. [2021-11-19 14:13:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:13:04,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:13:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:04,467 INFO L225 Difference]: With dead ends: 452 [2021-11-19 14:13:04,467 INFO L226 Difference]: Without dead ends: 448 [2021-11-19 14:13:04,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:13:04,468 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 137 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:04,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 0 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:13:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-19 14:13:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 340. [2021-11-19 14:13:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.415929203539823) internal successors, (1158), 339 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1158 transitions. [2021-11-19 14:13:04,473 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1158 transitions. Word has length 24 [2021-11-19 14:13:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:04,474 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1158 transitions. [2021-11-19 14:13:04,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1158 transitions. [2021-11-19 14:13:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:04,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:04,474 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:04,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (183)] Ended with exit code 0 [2021-11-19 14:13:04,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:04,675 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1619267475, now seen corresponding path program 80 times [2021-11-19 14:13:04,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:04,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241529810] [2021-11-19 14:13:04,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:13:04,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:04,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:04,677 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:04,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2021-11-19 14:13:04,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:13:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:04,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:05,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:05,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:05,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241529810] [2021-11-19 14:13:05,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241529810] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:13:05,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:13:05,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-19 14:13:05,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687140385] [2021-11-19 14:13:05,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:05,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:13:05,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:13:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:13:05,762 INFO L87 Difference]: Start difference. First operand 340 states and 1158 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) [2021-11-19 14:13:06,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:06,819 INFO L93 Difference]: Finished difference Result 438 states and 1445 transitions. [2021-11-19 14:13:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:06,819 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 24 [2021-11-19 14:13:06,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:06,820 INFO L225 Difference]: With dead ends: 438 [2021-11-19 14:13:06,820 INFO L226 Difference]: Without dead ends: 438 [2021-11-19 14:13:06,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:13:06,821 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:06,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:13:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-19 14:13:06,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 336. [2021-11-19 14:13:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4149253731343285) internal successors, (1144), 335 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1144 transitions. [2021-11-19 14:13:06,826 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1144 transitions. Word has length 24 [2021-11-19 14:13:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:06,826 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1144 transitions. [2021-11-19 14:13:06,826 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) [2021-11-19 14:13:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1144 transitions. [2021-11-19 14:13:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:06,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:06,827 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:06,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (184)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:07,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:07,027 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:07,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1057779913, now seen corresponding path program 81 times [2021-11-19 14:13:07,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:07,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057056938] [2021-11-19 14:13:07,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:13:07,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:07,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:07,029 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:07,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2021-11-19 14:13:07,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:13:07,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:07,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:07,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:07,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:07,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:07,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057056938] [2021-11-19 14:13:07,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057056938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:07,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [137574129] [2021-11-19 14:13:07,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:13:07,928 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:13:07,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:13:07,929 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:13:07,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (186)] Waiting until timeout for monitored process [2021-11-19 14:13:08,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:13:08,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:08,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:08,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:08,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [137574129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:08,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21525748] [2021-11-19 14:13:08,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:13:08,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:13:08,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:13:08,819 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:13:08,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-11-19 14:13:09,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:13:09,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:09,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:13:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:09,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:09,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21525748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:09,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:13:09,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-19 14:13:09,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283019431] [2021-11-19 14:13:09,845 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:13:09,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:13:09,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:09,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:13:09,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:13:09,846 INFO L87 Difference]: Start difference. First operand 336 states and 1144 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:11,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:11,754 INFO L93 Difference]: Finished difference Result 534 states and 1676 transitions. [2021-11-19 14:13:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:13:11,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 14:13:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:11,756 INFO L225 Difference]: With dead ends: 534 [2021-11-19 14:13:11,756 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 14:13:11,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2021-11-19 14:13:11,756 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:11,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:13:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 14:13:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 334. [2021-11-19 14:13:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.4204204204204203) internal successors, (1139), 333 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1139 transitions. [2021-11-19 14:13:11,762 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1139 transitions. Word has length 24 [2021-11-19 14:13:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:11,763 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1139 transitions. [2021-11-19 14:13:11,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1139 transitions. [2021-11-19 14:13:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:11,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:11,763 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:11,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2021-11-19 14:13:11,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (185)] Ended with exit code 0 [2021-11-19 14:13:12,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (186)] Ended with exit code 0 [2021-11-19 14:13:12,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:13:12,364 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2004143963, now seen corresponding path program 82 times [2021-11-19 14:13:12,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:12,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585944450] [2021-11-19 14:13:12,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:13:12,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:12,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:12,366 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:12,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2021-11-19 14:13:12,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:13:12,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:12,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:12,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:13,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:13,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585944450] [2021-11-19 14:13:13,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585944450] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:13,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1494543388] [2021-11-19 14:13:13,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:13:13,651 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:13:13,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:13:13,652 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:13:13,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (189)] Waiting until timeout for monitored process [2021-11-19 14:13:13,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:13:13,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:14,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:14,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1494543388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:14,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601972160] [2021-11-19 14:13:14,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:13:14,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:13:14,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:13:14,569 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:13:14,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-11-19 14:13:14,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:13:14,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:14,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:14,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:14,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:15,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601972160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:15,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:13:15,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-19 14:13:15,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124897902] [2021-11-19 14:13:15,373 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:13:15,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:13:15,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:13:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:13:15,373 INFO L87 Difference]: Start difference. First operand 334 states and 1139 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:17,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:17,390 INFO L93 Difference]: Finished difference Result 704 states and 2210 transitions. [2021-11-19 14:13:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:13:17,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 24 [2021-11-19 14:13:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:17,392 INFO L225 Difference]: With dead ends: 704 [2021-11-19 14:13:17,392 INFO L226 Difference]: Without dead ends: 704 [2021-11-19 14:13:17,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:13:17,393 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 136 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:17,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 0 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:13:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-19 14:13:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 342. [2021-11-19 14:13:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.4574780058651027) internal successors, (1179), 341 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1179 transitions. [2021-11-19 14:13:17,400 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1179 transitions. Word has length 24 [2021-11-19 14:13:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:17,400 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1179 transitions. [2021-11-19 14:13:17,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1179 transitions. [2021-11-19 14:13:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:17,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:17,401 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:17,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (189)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:17,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-11-19 14:13:17,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (188)] Ended with exit code 0 [2021-11-19 14:13:18,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:18,001 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:18,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1435516679, now seen corresponding path program 83 times [2021-11-19 14:13:18,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:18,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688566325] [2021-11-19 14:13:18,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:13:18,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:18,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:18,003 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:18,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2021-11-19 14:13:18,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:13:18,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:18,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:19,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:19,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688566325] [2021-11-19 14:13:19,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688566325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:19,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1539769750] [2021-11-19 14:13:19,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:13:19,328 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:13:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:13:19,329 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:13:19,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (192)] Waiting until timeout for monitored process [2021-11-19 14:13:19,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:13:19,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:19,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:19,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:20,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:20,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1539769750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:20,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390940164] [2021-11-19 14:13:20,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:13:20,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:13:20,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:13:20,414 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:13:20,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-11-19 14:13:20,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:13:20,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:21,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:21,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390940164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:21,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:13:21,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-19 14:13:21,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221852061] [2021-11-19 14:13:21,420 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:13:21,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:13:21,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:13:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:13:21,421 INFO L87 Difference]: Start difference. First operand 342 states and 1179 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:23,599 INFO L93 Difference]: Finished difference Result 700 states and 2198 transitions. [2021-11-19 14:13:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:13:23,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 24 [2021-11-19 14:13:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:23,601 INFO L225 Difference]: With dead ends: 700 [2021-11-19 14:13:23,601 INFO L226 Difference]: Without dead ends: 700 [2021-11-19 14:13:23,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:13:23,602 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 121 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:23,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 0 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:13:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-19 14:13:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 338. [2021-11-19 14:13:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.4332344213649852) internal successors, (1157), 337 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1157 transitions. [2021-11-19 14:13:23,613 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1157 transitions. Word has length 24 [2021-11-19 14:13:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:23,613 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1157 transitions. [2021-11-19 14:13:23,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1157 transitions. [2021-11-19 14:13:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:23,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:23,615 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:23,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (192)] Ended with exit code 0 [2021-11-19 14:13:23,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:24,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (191)] Ended with exit code 0 [2021-11-19 14:13:24,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:24,218 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2135848915, now seen corresponding path program 84 times [2021-11-19 14:13:24,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:24,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008616682] [2021-11-19 14:13:24,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:13:24,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:24,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:24,220 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:24,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2021-11-19 14:13:24,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:13:24,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:24,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:25,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:25,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008616682] [2021-11-19 14:13:25,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008616682] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:13:25,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:13:25,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:13:25,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780833199] [2021-11-19 14:13:25,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:25,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:13:25,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:13:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:13:25,240 INFO L87 Difference]: Start difference. First operand 338 states and 1157 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) [2021-11-19 14:13:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:26,239 INFO L93 Difference]: Finished difference Result 498 states and 1632 transitions. [2021-11-19 14:13:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:26,240 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 24 [2021-11-19 14:13:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:26,241 INFO L225 Difference]: With dead ends: 498 [2021-11-19 14:13:26,241 INFO L226 Difference]: Without dead ends: 498 [2021-11-19 14:13:26,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:13:26,241 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:26,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:13:26,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-19 14:13:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 334. [2021-11-19 14:13:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.4204204204204203) internal successors, (1139), 333 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1139 transitions. [2021-11-19 14:13:26,248 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1139 transitions. Word has length 24 [2021-11-19 14:13:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:26,248 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1139 transitions. [2021-11-19 14:13:26,248 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) [2021-11-19 14:13:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1139 transitions. [2021-11-19 14:13:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:26,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:26,249 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:26,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (194)] Ended with exit code 0 [2021-11-19 14:13:26,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:26,449 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:26,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:26,449 INFO L85 PathProgramCache]: Analyzing trace with hash 908257182, now seen corresponding path program 84 times [2021-11-19 14:13:26,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:26,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108543836] [2021-11-19 14:13:26,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:13:26,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:26,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:26,451 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:26,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2021-11-19 14:13:26,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:13:26,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:26,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:13:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:27,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:27,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:27,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108543836] [2021-11-19 14:13:27,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108543836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:27,612 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:13:27,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:13:27,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552040029] [2021-11-19 14:13:27,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:27,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:13:27,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:13:27,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:13:27,613 INFO L87 Difference]: Start difference. First operand 334 states and 1139 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:28,465 INFO L93 Difference]: Finished difference Result 522 states and 1652 transitions. [2021-11-19 14:13:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:28,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:13:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:28,467 INFO L225 Difference]: With dead ends: 522 [2021-11-19 14:13:28,467 INFO L226 Difference]: Without dead ends: 522 [2021-11-19 14:13:28,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:13:28,467 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:28,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:13:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-19 14:13:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 336. [2021-11-19 14:13:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4208955223880597) internal successors, (1146), 335 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) [2021-11-19 14:13:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1146 transitions. [2021-11-19 14:13:28,477 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1146 transitions. Word has length 24 [2021-11-19 14:13:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:28,478 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1146 transitions. [2021-11-19 14:13:28,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1146 transitions. [2021-11-19 14:13:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:28,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:28,479 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:28,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (195)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:28,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:28,684 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash -9693008, now seen corresponding path program 85 times [2021-11-19 14:13:28,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:28,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32809565] [2021-11-19 14:13:28,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:13:28,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:28,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:28,685 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:28,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (196)] Waiting until timeout for monitored process [2021-11-19 14:13:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:28,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:13:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:29,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:29,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:29,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32809565] [2021-11-19 14:13:29,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32809565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:29,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:13:29,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:13:29,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132678384] [2021-11-19 14:13:29,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:29,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:13:29,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:13:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:13:29,675 INFO L87 Difference]: Start difference. First operand 336 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:30,669 INFO L93 Difference]: Finished difference Result 500 states and 1606 transitions. [2021-11-19 14:13:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:13:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:30,671 INFO L225 Difference]: With dead ends: 500 [2021-11-19 14:13:30,671 INFO L226 Difference]: Without dead ends: 500 [2021-11-19 14:13:30,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:13:30,672 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:30,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:13:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-19 14:13:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 322. [2021-11-19 14:13:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.4080996884735204) internal successors, (1094), 321 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1094 transitions. [2021-11-19 14:13:30,678 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1094 transitions. Word has length 24 [2021-11-19 14:13:30,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:30,678 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1094 transitions. [2021-11-19 14:13:30,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1094 transitions. [2021-11-19 14:13:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:30,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:30,678 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:30,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (196)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:30,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:30,879 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash 934514942, now seen corresponding path program 86 times [2021-11-19 14:13:30,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:30,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242381347] [2021-11-19 14:13:30,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:13:30,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:30,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:30,880 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:30,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2021-11-19 14:13:31,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:13:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:13:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:31,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:31,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:31,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242381347] [2021-11-19 14:13:31,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242381347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:31,758 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:13:31,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:13:31,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823122177] [2021-11-19 14:13:31,759 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:31,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:13:31,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:13:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:13:31,759 INFO L87 Difference]: Start difference. First operand 322 states and 1094 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:32,833 INFO L93 Difference]: Finished difference Result 488 states and 1548 transitions. [2021-11-19 14:13:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-19 14:13:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:32,835 INFO L225 Difference]: With dead ends: 488 [2021-11-19 14:13:32,835 INFO L226 Difference]: Without dead ends: 488 [2021-11-19 14:13:32,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:13:32,835 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:32,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:13:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-19 14:13:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 312. [2021-11-19 14:13:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.372990353697749) internal successors, (1049), 311 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 1049 transitions. [2021-11-19 14:13:32,856 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 1049 transitions. Word has length 24 [2021-11-19 14:13:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:32,856 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 1049 transitions. [2021-11-19 14:13:32,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 1049 transitions. [2021-11-19 14:13:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:32,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:32,856 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:32,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (197)] Ended with exit code 0 [2021-11-19 14:13:33,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:33,057 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:33,057 INFO L85 PathProgramCache]: Analyzing trace with hash -545764553, now seen corresponding path program 85 times [2021-11-19 14:13:33,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:33,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123598543] [2021-11-19 14:13:33,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:13:33,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:33,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:33,058 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:33,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2021-11-19 14:13:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:33,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:33,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:33,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:33,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123598543] [2021-11-19 14:13:33,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123598543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:33,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [831014537] [2021-11-19 14:13:33,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:13:33,704 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:13:33,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:13:33,705 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:13:33,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (199)] Waiting until timeout for monitored process [2021-11-19 14:13:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:33,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:33,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:34,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:34,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [831014537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:34,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788449400] [2021-11-19 14:13:34,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:13:34,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:13:34,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:13:34,300 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:13:34,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-11-19 14:13:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:34,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:34,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:34,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:34,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788449400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:34,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:13:34,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 10 [2021-11-19 14:13:34,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274837085] [2021-11-19 14:13:34,814 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:13:34,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:13:34,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:34,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:13:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:13:34,815 INFO L87 Difference]: Start difference. First operand 312 states and 1049 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:35,700 INFO L93 Difference]: Finished difference Result 462 states and 1463 transitions. [2021-11-19 14:13:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:35,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 24 [2021-11-19 14:13:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:35,702 INFO L225 Difference]: With dead ends: 462 [2021-11-19 14:13:35,702 INFO L226 Difference]: Without dead ends: 462 [2021-11-19 14:13:35,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:13:35,702 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:35,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:13:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-19 14:13:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 310. [2021-11-19 14:13:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.3689320388349513) internal successors, (1041), 309 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1041 transitions. [2021-11-19 14:13:35,708 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1041 transitions. Word has length 24 [2021-11-19 14:13:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:35,708 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1041 transitions. [2021-11-19 14:13:35,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1041 transitions. [2021-11-19 14:13:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:35,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:35,709 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:35,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (198)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:35,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (199)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:36,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-11-19 14:13:36,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:13:36,310 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:36,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:36,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1828322629, now seen corresponding path program 86 times [2021-11-19 14:13:36,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:36,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832495165] [2021-11-19 14:13:36,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:13:36,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:36,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:36,311 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:36,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (201)] Waiting until timeout for monitored process [2021-11-19 14:13:36,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:13:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:36,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:36,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:36,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:37,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:37,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832495165] [2021-11-19 14:13:37,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832495165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:37,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614777606] [2021-11-19 14:13:37,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:13:37,311 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:13:37,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:13:37,312 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:13:37,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (202)] Waiting until timeout for monitored process [2021-11-19 14:13:37,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:13:37,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:37,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:38,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1614777606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:38,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963314412] [2021-11-19 14:13:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:13:38,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:13:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:13:38,176 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:13:38,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-11-19 14:13:38,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:13:38,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:38,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:13:38,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:38,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:39,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963314412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:39,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:13:39,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 15 [2021-11-19 14:13:39,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283562414] [2021-11-19 14:13:39,158 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:13:39,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 14:13:39,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 14:13:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:13:39,158 INFO L87 Difference]: Start difference. First operand 310 states and 1041 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-11-19 14:13:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:40,375 INFO L93 Difference]: Finished difference Result 486 states and 1537 transitions. [2021-11-19 14:13:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 24 [2021-11-19 14:13:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:40,376 INFO L225 Difference]: With dead ends: 486 [2021-11-19 14:13:40,376 INFO L226 Difference]: Without dead ends: 486 [2021-11-19 14:13:40,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:13:40,376 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:40,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:13:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-19 14:13:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 314. [2021-11-19 14:13:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3961661341853033) internal successors, (1063), 313 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1063 transitions. [2021-11-19 14:13:40,385 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1063 transitions. Word has length 24 [2021-11-19 14:13:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:40,386 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1063 transitions. [2021-11-19 14:13:40,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-11-19 14:13:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1063 transitions. [2021-11-19 14:13:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:40,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:40,387 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:40,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (201)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:40,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (202)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:40,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2021-11-19 14:13:41,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:13:41,000 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash -973015975, now seen corresponding path program 87 times [2021-11-19 14:13:41,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:41,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642541991] [2021-11-19 14:13:41,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:13:41,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:41,002 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:41,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (204)] Waiting until timeout for monitored process [2021-11-19 14:13:41,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:13:41,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:41,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:42,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:42,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642541991] [2021-11-19 14:13:42,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642541991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:42,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [481942266] [2021-11-19 14:13:42,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:13:42,089 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:13:42,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:13:42,090 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:13:42,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (205)] Waiting until timeout for monitored process [2021-11-19 14:13:42,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:13:42,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:42,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:42,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:42,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:43,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [481942266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:43,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169534947] [2021-11-19 14:13:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:13:43,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:13:43,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:13:43,064 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:13:43,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-11-19 14:13:43,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:13:43,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:43,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:13:43,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:43,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:44,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169534947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:44,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:13:44,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-19 14:13:44,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959858009] [2021-11-19 14:13:44,121 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:13:44,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:13:44,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:13:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:13:44,122 INFO L87 Difference]: Start difference. First operand 314 states and 1063 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:45,294 INFO L93 Difference]: Finished difference Result 454 states and 1467 transitions. [2021-11-19 14:13:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:45,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 14:13:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:45,295 INFO L225 Difference]: With dead ends: 454 [2021-11-19 14:13:45,295 INFO L226 Difference]: Without dead ends: 454 [2021-11-19 14:13:45,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:13:45,295 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:45,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:13:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-19 14:13:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 302. [2021-11-19 14:13:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.345514950166113) internal successors, (1007), 301 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1007 transitions. [2021-11-19 14:13:45,301 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1007 transitions. Word has length 24 [2021-11-19 14:13:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:45,301 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1007 transitions. [2021-11-19 14:13:45,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1007 transitions. [2021-11-19 14:13:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:45,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:45,302 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:45,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2021-11-19 14:13:45,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (205)] Ended with exit code 0 [2021-11-19 14:13:45,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (204)] Ended with exit code 0 [2021-11-19 14:13:45,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:45,902 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash -484353819, now seen corresponding path program 88 times [2021-11-19 14:13:45,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:45,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557685552] [2021-11-19 14:13:45,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:13:45,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:45,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:45,904 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:45,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (207)] Waiting until timeout for monitored process [2021-11-19 14:13:46,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:13:46,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:46,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:46,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:46,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:46,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557685552] [2021-11-19 14:13:46,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557685552] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:13:46,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:13:46,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:13:46,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498711283] [2021-11-19 14:13:46,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:46,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:13:46,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:13:46,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:13:46,799 INFO L87 Difference]: Start difference. First operand 302 states and 1007 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) [2021-11-19 14:13:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:47,769 INFO L93 Difference]: Finished difference Result 446 states and 1399 transitions. [2021-11-19 14:13:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:47,770 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 24 [2021-11-19 14:13:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:47,771 INFO L225 Difference]: With dead ends: 446 [2021-11-19 14:13:47,771 INFO L226 Difference]: Without dead ends: 446 [2021-11-19 14:13:47,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:13:47,771 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:47,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:13:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-19 14:13:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 302. [2021-11-19 14:13:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.335548172757475) internal successors, (1004), 301 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1004 transitions. [2021-11-19 14:13:47,782 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1004 transitions. Word has length 24 [2021-11-19 14:13:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:47,782 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1004 transitions. [2021-11-19 14:13:47,782 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) [2021-11-19 14:13:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1004 transitions. [2021-11-19 14:13:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:47,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:47,782 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:47,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (207)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:47,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:47,983 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash 370952835, now seen corresponding path program 89 times [2021-11-19 14:13:47,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:47,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749906655] [2021-11-19 14:13:47,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:13:47,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:47,985 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:47,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (208)] Waiting until timeout for monitored process [2021-11-19 14:13:48,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 14:13:48,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:48,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:48,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:48,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:48,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749906655] [2021-11-19 14:13:48,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749906655] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:13:48,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:13:48,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:13:48,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703030767] [2021-11-19 14:13:48,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:48,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:13:48,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:13:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:13:48,983 INFO L87 Difference]: Start difference. First operand 302 states and 1004 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) [2021-11-19 14:13:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:49,979 INFO L93 Difference]: Finished difference Result 444 states and 1393 transitions. [2021-11-19 14:13:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:49,979 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 24 [2021-11-19 14:13:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:49,980 INFO L225 Difference]: With dead ends: 444 [2021-11-19 14:13:49,980 INFO L226 Difference]: Without dead ends: 444 [2021-11-19 14:13:49,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:13:49,981 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:49,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:13:49,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-19 14:13:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 298. [2021-11-19 14:13:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.3063973063973062) internal successors, (982), 297 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 982 transitions. [2021-11-19 14:13:49,992 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 982 transitions. Word has length 24 [2021-11-19 14:13:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:49,992 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 982 transitions. [2021-11-19 14:13:49,992 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) [2021-11-19 14:13:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 982 transitions. [2021-11-19 14:13:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:13:49,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:49,993 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:50,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (208)] Ended with exit code 0 [2021-11-19 14:13:50,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:50,193 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:50,194 INFO L85 PathProgramCache]: Analyzing trace with hash -355637161, now seen corresponding path program 90 times [2021-11-19 14:13:50,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:50,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913952116] [2021-11-19 14:13:50,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:13:50,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:50,195 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:50,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (209)] Waiting until timeout for monitored process [2021-11-19 14:13:50,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 14:13:50,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:13:50,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:13:50,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:50,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:50,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:50,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913952116] [2021-11-19 14:13:50,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913952116] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:13:50,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:13:50,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-19 14:13:50,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746823172] [2021-11-19 14:13:50,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:50,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:13:50,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:13:50,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:13:50,971 INFO L87 Difference]: Start difference. First operand 298 states and 982 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) [2021-11-19 14:13:51,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:51,750 INFO L93 Difference]: Finished difference Result 406 states and 1285 transitions. [2021-11-19 14:13:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:51,751 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 24 [2021-11-19 14:13:51,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:51,751 INFO L225 Difference]: With dead ends: 406 [2021-11-19 14:13:51,751 INFO L226 Difference]: Without dead ends: 406 [2021-11-19 14:13:51,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:13:51,752 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:51,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:13:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-19 14:13:51,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 286. [2021-11-19 14:13:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.3017543859649123) internal successors, (941), 285 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 941 transitions. [2021-11-19 14:13:51,759 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 941 transitions. Word has length 24 [2021-11-19 14:13:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:51,760 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 941 transitions. [2021-11-19 14:13:51,760 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) [2021-11-19 14:13:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 941 transitions. [2021-11-19 14:13:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 14:13:51,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:51,761 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:51,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (209)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:51,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:51,973 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-19 14:13:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1805174116, now seen corresponding path program 1 times [2021-11-19 14:13:51,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:51,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875625528] [2021-11-19 14:13:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:13:51,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:51,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:51,976 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:52,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (210)] Waiting until timeout for monitored process [2021-11-19 14:13:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:52,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 14:13:52,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:52,918 INFO L354 Elim1Store]: treesize reduction 394, result has 3.2 percent of original size [2021-11-19 14:13:52,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 496 treesize of output 176 [2021-11-19 14:13:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:13:53,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:58,052 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-11-19 14:13:58,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 241 [2021-11-19 14:14:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:16,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:16,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875625528] [2021-11-19 14:14:16,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875625528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:16,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [527735120] [2021-11-19 14:14:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:16,605 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:16,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:16,606 INFO L229 MonitoredProcess]: Starting monitored process 211 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:16,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (211)] Waiting until timeout for monitored process [2021-11-19 14:14:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:16,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 14:14:16,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:18,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:18,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:18,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:18,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:18,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:18,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:18,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:18,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:18,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:18,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:18,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:18,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:14:18,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 348 treesize of output 136 [2021-11-19 14:14:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:18,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:22,440 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-11-19 14:14:22,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 521 treesize of output 289 [2021-11-19 14:14:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:53,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [527735120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:53,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522597596] [2021-11-19 14:14:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:53,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:53,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:53,393 INFO L229 MonitoredProcess]: Starting monitored process 212 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:53,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e6cf2e3-5e24-4b6a-8698-c33eb9acb59f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-11-19 14:14:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:55,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 14:14:55,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:56,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:56,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:56,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:56,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:56,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:56,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:14:56,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:56,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:14:56,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 452 treesize of output 176 [2021-11-19 14:14:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:14:57,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:59,062 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-11-19 14:14:59,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 241 [2021-11-19 14:15:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:15:20,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522597596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:20,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:15:20,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10, 9, 8, 7] total 35 [2021-11-19 14:15:20,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628258729] [2021-11-19 14:15:20,912 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:20,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-19 14:15:20,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-19 14:15:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1117, Unknown=2, NotChecked=0, Total=1260 [2021-11-19 14:15:20,913 INFO L87 Difference]: Start difference. First operand 286 states and 941 transitions. Second operand has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:15:38,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:15:55,024 WARN L227 SmtUtils]: Spent 10.20s on a formula simplification. DAG size of input: 135 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:15:59,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []