./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:49:15,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:49:15,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:49:15,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:49:15,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:49:15,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:49:15,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:49:15,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:49:15,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:49:15,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:49:15,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:49:15,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:49:15,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:49:15,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:49:15,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:49:15,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:49:15,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:49:15,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:49:15,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:49:15,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:49:15,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:49:15,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:49:15,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:49:15,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:49:15,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:49:15,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:49:15,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:49:15,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:49:15,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:49:15,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:49:15,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:49:15,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:49:15,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:49:15,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:49:15,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:49:15,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:49:15,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:49:15,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:49:15,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:49:15,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:49:15,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:49:15,838 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 15:49:15,857 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:49:15,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:49:15,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:49:15,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:49:15,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:49:15,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:49:15,865 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:49:15,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:49:15,866 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:49:15,866 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:49:15,866 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:49:15,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:49:15,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:49:15,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:49:15,867 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:49:15,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:49:15,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:49:15,867 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:49:15,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 15:49:15,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 15:49:15,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:49:15,869 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:49:15,869 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 15:49:15,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:49:15,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:49:15,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:49:15,870 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 15:49:15,870 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 15:49:15,870 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 15:49:15,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:49:15,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 15:49:15,871 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:49:15,871 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:49:15,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:49:15,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:49:15,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:49:15,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:49:15,872 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:49:15,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:49:15,872 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:49:15,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:49:15,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:49:15,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-12-14 15:49:16,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:49:16,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:49:16,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:49:16,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:49:16,056 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:49:16,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-12-14 15:49:18,665 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:49:18,821 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:49:18,822 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-12-14 15:49:18,828 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/data/04f26487d/842aa16a5cfd496b835368edaeb7ef2a/FLAG8c76ca05b [2022-12-14 15:49:18,840 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/data/04f26487d/842aa16a5cfd496b835368edaeb7ef2a [2022-12-14 15:49:18,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:49:18,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:49:18,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:49:18,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:49:18,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:49:18,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:49:18" (1/1) ... [2022-12-14 15:49:18,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289d53d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:18, skipping insertion in model container [2022-12-14 15:49:18,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:49:18" (1/1) ... [2022-12-14 15:49:18,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:49:18,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:49:19,008 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-12-14 15:49:19,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:49:19,024 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 15:49:19,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6fb0174f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:19, skipping insertion in model container [2022-12-14 15:49:19,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:49:19,025 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 15:49:19,027 INFO L158 Benchmark]: Toolchain (without parser) took 183.16ms. Allocated memory is still 111.1MB. Free memory was 64.4MB in the beginning and 54.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 15:49:19,027 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 111.1MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:49:19,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.57ms. Allocated memory is still 111.1MB. Free memory was 64.4MB in the beginning and 54.7MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 15:49:19,028 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 111.1MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.57ms. Allocated memory is still 111.1MB. Free memory was 64.4MB in the beginning and 54.7MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:49:20,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:49:20,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:49:20,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:49:20,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:49:20,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:49:20,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:49:20,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:49:20,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:49:20,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:49:20,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:49:20,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:49:20,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:49:20,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:49:20,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:49:20,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:49:20,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:49:20,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:49:20,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:49:20,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:49:20,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:49:20,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:49:20,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:49:20,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:49:20,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:49:20,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:49:20,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:49:20,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:49:20,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:49:20,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:49:20,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:49:20,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:49:20,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:49:20,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:49:20,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:49:20,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:49:20,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:49:20,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:49:20,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:49:20,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:49:20,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:49:20,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 15:49:20,489 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:49:20,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:49:20,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:49:20,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:49:20,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:49:20,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:49:20,491 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:49:20,491 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:49:20,491 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:49:20,491 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:49:20,491 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:49:20,491 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:49:20,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 15:49:20,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 15:49:20,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:49:20,493 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:49:20,493 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 15:49:20,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:49:20,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:49:20,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:49:20,494 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 15:49:20,494 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 15:49:20,494 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 15:49:20,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:49:20,494 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 15:49:20,495 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 15:49:20,495 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 15:49:20,495 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:49:20,495 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:49:20,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:49:20,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 15:49:20,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:49:20,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:49:20,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:49:20,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:49:20,497 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 15:49:20,497 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 15:49:20,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:49:20,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 15:49:20,497 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_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-12-14 15:49:20,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:49:20,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:49:20,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:49:20,732 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:49:20,732 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:49:20,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-12-14 15:49:23,343 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:49:23,489 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:49:23,489 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-12-14 15:49:23,495 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/data/9769247e5/9b68e3ead9c2454fb23bf08c8e133ee9/FLAGeeaa8390b [2022-12-14 15:49:23,505 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/data/9769247e5/9b68e3ead9c2454fb23bf08c8e133ee9 [2022-12-14 15:49:23,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:49:23,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:49:23,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:49:23,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:49:23,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:49:23,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7895c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23, skipping insertion in model container [2022-12-14 15:49:23,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:49:23,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:49:23,654 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-12-14 15:49:23,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:49:23,673 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 15:49:23,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:49:23,688 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-12-14 15:49:23,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:49:23,696 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:49:23,712 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-12-14 15:49:23,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:49:23,726 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:49:23,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23 WrapperNode [2022-12-14 15:49:23,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:49:23,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:49:23,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:49:23,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:49:23,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,767 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 272 [2022-12-14 15:49:23,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:49:23,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:49:23,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:49:23,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:49:23,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,791 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:49:23,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:49:23,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:49:23,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:49:23,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (1/1) ... [2022-12-14 15:49:23,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:49:23,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:49:23,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:49:23,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:49:23,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:49:23,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 15:49:23,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:49:23,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 15:49:23,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 15:49:23,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 15:49:23,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 15:49:23,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 15:49:23,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 15:49:23,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 15:49:23,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 15:49:23,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:49:23,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:49:23,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:49:23,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 15:49:23,858 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 15:49:23,963 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:49:23,965 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:49:24,613 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:49:24,623 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:49:24,623 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 15:49:24,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:49:24 BoogieIcfgContainer [2022-12-14 15:49:24,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:49:24,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:49:24,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:49:24,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:49:24,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:49:23" (1/3) ... [2022-12-14 15:49:24,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250e6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:49:24, skipping insertion in model container [2022-12-14 15:49:24,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:49:23" (2/3) ... [2022-12-14 15:49:24,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250e6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:49:24, skipping insertion in model container [2022-12-14 15:49:24,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:49:24" (3/3) ... [2022-12-14 15:49:24,634 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2022-12-14 15:49:24,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:49:24,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-12-14 15:49:24,657 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 15:49:24,763 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 15:49:24,800 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 15:49:24,812 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 376 places, 395 transitions, 814 flow [2022-12-14 15:49:24,814 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 376 places, 395 transitions, 814 flow [2022-12-14 15:49:24,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 376 places, 395 transitions, 814 flow [2022-12-14 15:49:24,947 INFO L130 PetriNetUnfolder]: 29/392 cut-off events. [2022-12-14 15:49:24,947 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 15:49:24,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 392 events. 29/392 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 846 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 290. Up to 3 conditions per place. [2022-12-14 15:49:24,970 INFO L119 LiptonReduction]: Number of co-enabled transitions 25650 [2022-12-14 15:50:03,910 INFO L134 LiptonReduction]: Checked pairs total: 38400 [2022-12-14 15:50:03,910 INFO L136 LiptonReduction]: Total number of compositions: 478 [2022-12-14 15:50:03,917 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 83 transitions, 190 flow [2022-12-14 15:50:04,329 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:04,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:50:04,350 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6263fada, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:50:04,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-12-14 15:50:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:04,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 15:50:04,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:04,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 15:50:04,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash 50514, now seen corresponding path program 1 times [2022-12-14 15:50:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:04,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925426483] [2022-12-14 15:50:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:04,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:04,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:04,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:04,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 15:50:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:04,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:50:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:04,621 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 15:50:04,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 15:50:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:04,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:04,648 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925426483] [2022-12-14 15:50:04,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925426483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:04,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:04,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:50:04,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118240311] [2022-12-14 15:50:04,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:04,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:50:04,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:04,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:50:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:50:04,698 INFO L87 Difference]: Start difference. First operand has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:05,199 INFO L93 Difference]: Finished difference Result 6760 states and 25219 transitions. [2022-12-14 15:50:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:50:05,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 15:50:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:05,278 INFO L225 Difference]: With dead ends: 6760 [2022-12-14 15:50:05,278 INFO L226 Difference]: Without dead ends: 6760 [2022-12-14 15:50:05,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:50:05,282 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:05,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:50:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2022-12-14 15:50:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6760. [2022-12-14 15:50:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 5260 states have (on average 4.794486692015209) internal successors, (25219), 6759 states have internal predecessors, (25219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 25219 transitions. [2022-12-14 15:50:05,588 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 25219 transitions. Word has length 2 [2022-12-14 15:50:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:05,588 INFO L495 AbstractCegarLoop]: Abstraction has 6760 states and 25219 transitions. [2022-12-14 15:50:05,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 25219 transitions. [2022-12-14 15:50:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 15:50:05,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:05,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 15:50:05,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:50:05,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:05,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:05,790 INFO L85 PathProgramCache]: Analyzing trace with hash 50515, now seen corresponding path program 1 times [2022-12-14 15:50:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:05,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811390347] [2022-12-14 15:50:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:05,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:05,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:05,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:05,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 15:50:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:50:05,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:05,971 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:50:05,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:50:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:05,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:05,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811390347] [2022-12-14 15:50:05,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811390347] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:05,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:05,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:50:05,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167526458] [2022-12-14 15:50:05,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:05,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:50:05,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:05,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:50:05,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:50:05,998 INFO L87 Difference]: Start difference. First operand 6760 states and 25219 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:06,841 INFO L93 Difference]: Finished difference Result 13516 states and 50434 transitions. [2022-12-14 15:50:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:50:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 15:50:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:06,911 INFO L225 Difference]: With dead ends: 13516 [2022-12-14 15:50:06,912 INFO L226 Difference]: Without dead ends: 13516 [2022-12-14 15:50:06,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:50:06,913 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:06,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:50:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13516 states. [2022-12-14 15:50:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13516 to 6763. [2022-12-14 15:50:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 5263 states have (on average 4.793273798213947) internal successors, (25227), 6762 states have internal predecessors, (25227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 25227 transitions. [2022-12-14 15:50:07,251 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 25227 transitions. Word has length 2 [2022-12-14 15:50:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:07,251 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 25227 transitions. [2022-12-14 15:50:07,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 25227 transitions. [2022-12-14 15:50:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 15:50:07,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:07,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 15:50:07,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 15:50:07,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:07,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1576707, now seen corresponding path program 1 times [2022-12-14 15:50:07,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:07,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407909590] [2022-12-14 15:50:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:07,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:07,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:07,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:07,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 15:50:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:07,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:50:07,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:07,696 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:50:07,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:50:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:07,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:50:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:07,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407909590] [2022-12-14 15:50:07,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407909590] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:50:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1963235837] [2022-12-14 15:50:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:07,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:50:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:50:07,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:50:07,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 15:50:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:50:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:08,136 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:50:08,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:50:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:08,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:50:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:08,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1963235837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:50:08,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106048984] [2022-12-14 15:50:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:08,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:50:08,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:50:08,238 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:50:08,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:50:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:50:08,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:08,405 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:50:08,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:50:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:08,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:50:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:08,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106048984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:50:08,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:50:08,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 15:50:08,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033503409] [2022-12-14 15:50:08,565 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:50:08,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:50:08,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:50:08,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:50:08,566 INFO L87 Difference]: Start difference. First operand 6763 states and 25227 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:10,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:12,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:14,528 INFO L93 Difference]: Finished difference Result 27031 states and 100872 transitions. [2022-12-14 15:50:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:50:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 15:50:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:14,627 INFO L225 Difference]: With dead ends: 27031 [2022-12-14 15:50:14,627 INFO L226 Difference]: Without dead ends: 27031 [2022-12-14 15:50:14,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:50:14,628 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 431 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:14,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 0 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-12-14 15:50:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27031 states. [2022-12-14 15:50:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27031 to 6772. [2022-12-14 15:50:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 5272 states have (on average 4.789643399089529) internal successors, (25251), 6771 states have internal predecessors, (25251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 25251 transitions. [2022-12-14 15:50:15,007 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 25251 transitions. Word has length 3 [2022-12-14 15:50:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:15,007 INFO L495 AbstractCegarLoop]: Abstraction has 6772 states and 25251 transitions. [2022-12-14 15:50:15,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 25251 transitions. [2022-12-14 15:50:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 15:50:15,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:15,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 15:50:15,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 15:50:15,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 15:50:15,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:50:15,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:50:15,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:15,613 INFO L85 PathProgramCache]: Analyzing trace with hash 49005010, now seen corresponding path program 1 times [2022-12-14 15:50:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:15,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011111854] [2022-12-14 15:50:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:15,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:15,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:15,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:15,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 15:50:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:50:15,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:15,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:15,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:15,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:15,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:15,815 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 15:50:15,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 15:50:15,841 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 15:50:15,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 15:50:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:15,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 15:50:15,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:15,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 15:50:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:15,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:15,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:15,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011111854] [2022-12-14 15:50:15,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011111854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:15,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:15,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:50:15,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559078050] [2022-12-14 15:50:15,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:15,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:50:15,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:50:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:50:15,942 INFO L87 Difference]: Start difference. First operand 6772 states and 25251 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:16,283 INFO L93 Difference]: Finished difference Result 5399 states and 19562 transitions. [2022-12-14 15:50:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:50:16,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 15:50:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:16,301 INFO L225 Difference]: With dead ends: 5399 [2022-12-14 15:50:16,301 INFO L226 Difference]: Without dead ends: 5399 [2022-12-14 15:50:16,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:50:16,302 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:16,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:50:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2022-12-14 15:50:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 5399. [2022-12-14 15:50:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 4305 states have (on average 4.544018583042973) internal successors, (19562), 5398 states have internal predecessors, (19562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 19562 transitions. [2022-12-14 15:50:16,393 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 19562 transitions. Word has length 4 [2022-12-14 15:50:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:16,394 INFO L495 AbstractCegarLoop]: Abstraction has 5399 states and 19562 transitions. [2022-12-14 15:50:16,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:16,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 19562 transitions. [2022-12-14 15:50:16,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 15:50:16,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:16,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 15:50:16,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 15:50:16,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:16,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash 49005012, now seen corresponding path program 1 times [2022-12-14 15:50:16,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084254714] [2022-12-14 15:50:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:16,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:16,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:16,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:16,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 15:50:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:16,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:50:16,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:16,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:16,784 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-14 15:50:16,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 15:50:17,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:17,026 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 15:50:17,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-14 15:50:17,290 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-14 15:50:17,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-12-14 15:50:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:18,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:18,148 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084254714] [2022-12-14 15:50:18,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084254714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:18,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:18,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:50:18,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112598275] [2022-12-14 15:50:18,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:18,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:50:18,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:50:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:50:18,150 INFO L87 Difference]: Start difference. First operand 5399 states and 19562 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:18,709 INFO L93 Difference]: Finished difference Result 4026 states and 13873 transitions. [2022-12-14 15:50:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:50:18,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 15:50:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:18,729 INFO L225 Difference]: With dead ends: 4026 [2022-12-14 15:50:18,729 INFO L226 Difference]: Without dead ends: 4026 [2022-12-14 15:50:18,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:50:18,730 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:18,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:50:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2022-12-14 15:50:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 4026. [2022-12-14 15:50:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 3338 states have (on average 4.156081485919713) internal successors, (13873), 4025 states have internal predecessors, (13873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13873 transitions. [2022-12-14 15:50:18,821 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13873 transitions. Word has length 4 [2022-12-14 15:50:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:18,821 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 13873 transitions. [2022-12-14 15:50:18,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13873 transitions. [2022-12-14 15:50:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:50:18,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:18,822 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 15:50:18,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 15:50:19,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:19,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:19,023 INFO L85 PathProgramCache]: Analyzing trace with hash -262295213, now seen corresponding path program 2 times [2022-12-14 15:50:19,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:19,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193851659] [2022-12-14 15:50:19,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:50:19,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:19,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:19,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:19,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 15:50:19,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:50:19,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:50:19,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:50:19,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:19,224 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:50:19,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:50:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:19,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:50:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:19,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193851659] [2022-12-14 15:50:19,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193851659] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:50:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1472090205] [2022-12-14 15:50:19,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:50:19,961 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:50:19,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:50:19,961 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:50:19,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-12-14 15:50:20,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:50:20,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:50:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:50:20,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:20,205 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:50:20,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:50:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:20,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:50:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:20,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1472090205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:50:20,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997652754] [2022-12-14 15:50:20,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:50:20,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:50:20,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:50:20,416 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:50:20,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:50:20,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:50:20,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:50:20,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:50:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:20,596 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:50:20,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:50:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:20,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:50:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:20,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997652754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:50:20,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:50:20,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-12-14 15:50:20,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223541515] [2022-12-14 15:50:20,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:50:20,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:50:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:50:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:50:20,803 INFO L87 Difference]: Start difference. First operand 4026 states and 13873 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:24,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:25,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:27,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:29,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:32,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:33,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:35,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:37,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:39,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:41,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:42,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:44,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:46,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:50:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:50,006 INFO L93 Difference]: Finished difference Result 32093 states and 110780 transitions. [2022-12-14 15:50:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 15:50:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 15:50:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:50,111 INFO L225 Difference]: With dead ends: 32093 [2022-12-14 15:50:50,111 INFO L226 Difference]: Without dead ends: 32093 [2022-12-14 15:50:50,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:50:50,112 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1742 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 173 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1742 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:50,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1742 Valid, 0 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1857 Invalid, 4 Unknown, 0 Unchecked, 27.6s Time] [2022-12-14 15:50:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32093 states. [2022-12-14 15:50:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32093 to 4042. [2022-12-14 15:50:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 3354 states have (on average 4.1463923673225995) internal successors, (13907), 4041 states have internal predecessors, (13907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 13907 transitions. [2022-12-14 15:50:50,326 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 13907 transitions. Word has length 6 [2022-12-14 15:50:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:50,326 INFO L495 AbstractCegarLoop]: Abstraction has 4042 states and 13907 transitions. [2022-12-14 15:50:50,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 13907 transitions. [2022-12-14 15:50:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:50:50,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:50,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:50:50,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 15:50:50,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-12-14 15:50:50,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 15:50:50,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:50:50,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash -150789624, now seen corresponding path program 1 times [2022-12-14 15:50:50,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:50,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982319377] [2022-12-14 15:50:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:50,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:50,934 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:50,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 15:50:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:51,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:50:51,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:51,093 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-14 15:50:51,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-14 15:50:51,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:51,261 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-14 15:50:51,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-12-14 15:50:51,385 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-14 15:50:51,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-14 15:50:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:51,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:51,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:51,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982319377] [2022-12-14 15:50:51,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982319377] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:51,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:51,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:50:51,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448544317] [2022-12-14 15:50:51,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:51,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:50:51,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:50:51,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:50:51,498 INFO L87 Difference]: Start difference. First operand 4042 states and 13907 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:51,917 INFO L93 Difference]: Finished difference Result 3930 states and 13577 transitions. [2022-12-14 15:50:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:50:51,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 15:50:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:51,929 INFO L225 Difference]: With dead ends: 3930 [2022-12-14 15:50:51,929 INFO L226 Difference]: Without dead ends: 3930 [2022-12-14 15:50:51,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:50:51,930 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:51,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:50:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2022-12-14 15:50:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3930. [2022-12-14 15:50:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3930 states, 3296 states have (on average 4.119235436893204) internal successors, (13577), 3929 states have internal predecessors, (13577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 13577 transitions. [2022-12-14 15:50:52,032 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 13577 transitions. Word has length 6 [2022-12-14 15:50:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:52,032 INFO L495 AbstractCegarLoop]: Abstraction has 3930 states and 13577 transitions. [2022-12-14 15:50:52,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 13577 transitions. [2022-12-14 15:50:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:50:52,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:52,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:50:52,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 15:50:52,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:52,235 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:52,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:52,236 INFO L85 PathProgramCache]: Analyzing trace with hash -150789622, now seen corresponding path program 1 times [2022-12-14 15:50:52,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:52,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320348668] [2022-12-14 15:50:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:52,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:52,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:52,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:52,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 15:50:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:52,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:50:52,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:52,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:52,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:52,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:52,489 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 15:50:52,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-14 15:50:52,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 15:50:52,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:52,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 15:50:52,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 15:50:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:52,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 15:50:52,627 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:50:52,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 15:50:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:52,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:52,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:52,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320348668] [2022-12-14 15:50:52,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320348668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:52,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:52,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:50:52,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132399076] [2022-12-14 15:50:52,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:52,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:50:52,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:52,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:50:52,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:50:52,702 INFO L87 Difference]: Start difference. First operand 3930 states and 13577 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:53,292 INFO L93 Difference]: Finished difference Result 3818 states and 13247 transitions. [2022-12-14 15:50:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:50:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 15:50:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:53,309 INFO L225 Difference]: With dead ends: 3818 [2022-12-14 15:50:53,309 INFO L226 Difference]: Without dead ends: 3818 [2022-12-14 15:50:53,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:50:53,310 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 178 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:53,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:50:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2022-12-14 15:50:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 3818. [2022-12-14 15:50:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3818 states, 3238 states have (on average 4.091105620753551) internal successors, (13247), 3817 states have internal predecessors, (13247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 13247 transitions. [2022-12-14 15:50:53,378 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 13247 transitions. Word has length 6 [2022-12-14 15:50:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:53,378 INFO L495 AbstractCegarLoop]: Abstraction has 3818 states and 13247 transitions. [2022-12-14 15:50:53,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:53,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 13247 transitions. [2022-12-14 15:50:53,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:50:53,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:53,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:50:53,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 15:50:53,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:53,579 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:53,579 INFO L85 PathProgramCache]: Analyzing trace with hash -379514214, now seen corresponding path program 1 times [2022-12-14 15:50:53,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:53,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129895667] [2022-12-14 15:50:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:53,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:53,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:53,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:53,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 15:50:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:53,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:50:53,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:53,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:53,699 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:53,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129895667] [2022-12-14 15:50:53,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129895667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:53,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:53,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:50:53,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521992202] [2022-12-14 15:50:53,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:53,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:50:53,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:53,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:50:53,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:50:53,701 INFO L87 Difference]: Start difference. First operand 3818 states and 13247 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:54,504 INFO L93 Difference]: Finished difference Result 4829 states and 16326 transitions. [2022-12-14 15:50:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:50:54,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 15:50:54,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:54,516 INFO L225 Difference]: With dead ends: 4829 [2022-12-14 15:50:54,516 INFO L226 Difference]: Without dead ends: 4829 [2022-12-14 15:50:54,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:50:54,517 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:54,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:50:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2022-12-14 15:50:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4347. [2022-12-14 15:50:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 3767 states have (on average 3.9936288823997876) internal successors, (15044), 4346 states have internal predecessors, (15044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 15044 transitions. [2022-12-14 15:50:54,597 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 15044 transitions. Word has length 7 [2022-12-14 15:50:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:54,597 INFO L495 AbstractCegarLoop]: Abstraction has 4347 states and 15044 transitions. [2022-12-14 15:50:54,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 15044 transitions. [2022-12-14 15:50:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 15:50:54,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:54,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:50:54,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 15:50:54,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:54,798 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:54,799 INFO L85 PathProgramCache]: Analyzing trace with hash 499406570, now seen corresponding path program 1 times [2022-12-14 15:50:54,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:54,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838530526] [2022-12-14 15:50:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:54,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:54,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:54,800 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:54,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 15:50:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:54,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:50:54,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:50:54,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:54,925 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:54,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838530526] [2022-12-14 15:50:54,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838530526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:54,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:54,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:50:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397756417] [2022-12-14 15:50:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:54,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:50:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:50:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:50:54,926 INFO L87 Difference]: Start difference. First operand 4347 states and 15044 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:55,828 INFO L93 Difference]: Finished difference Result 5864 states and 19870 transitions. [2022-12-14 15:50:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:50:55,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 15:50:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:55,844 INFO L225 Difference]: With dead ends: 5864 [2022-12-14 15:50:55,844 INFO L226 Difference]: Without dead ends: 5864 [2022-12-14 15:50:55,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:50:55,845 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:55,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:50:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5864 states. [2022-12-14 15:50:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5864 to 4347. [2022-12-14 15:50:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 3767 states have (on average 3.9936288823997876) internal successors, (15044), 4346 states have internal predecessors, (15044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 15044 transitions. [2022-12-14 15:50:55,938 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 15044 transitions. Word has length 8 [2022-12-14 15:50:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:55,938 INFO L495 AbstractCegarLoop]: Abstraction has 4347 states and 15044 transitions. [2022-12-14 15:50:55,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 15044 transitions. [2022-12-14 15:50:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 15:50:55,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:55,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:50:55,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 15:50:56,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:56,141 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:56,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1120095371, now seen corresponding path program 1 times [2022-12-14 15:50:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:56,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635075767] [2022-12-14 15:50:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:56,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:56,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:56,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:56,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 15:50:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:56,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:50:56,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:56,396 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 15:50:56,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 15:50:56,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-12-14 15:50:56,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:56,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 15:50:56,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:56,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 15:50:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:56,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:56,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635075767] [2022-12-14 15:50:56,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635075767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:56,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:56,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:50:56,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982668416] [2022-12-14 15:50:56,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:56,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:50:56,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:56,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:50:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:50:56,550 INFO L87 Difference]: Start difference. First operand 4347 states and 15044 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:56,885 INFO L93 Difference]: Finished difference Result 4116 states and 14328 transitions. [2022-12-14 15:50:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:50:56,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 15:50:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:56,895 INFO L225 Difference]: With dead ends: 4116 [2022-12-14 15:50:56,895 INFO L226 Difference]: Without dead ends: 4116 [2022-12-14 15:50:56,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:50:56,896 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 170 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:56,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:50:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4116 states. [2022-12-14 15:50:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4116 to 4116. [2022-12-14 15:50:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 3622 states have (on average 3.9558255107675317) internal successors, (14328), 4115 states have internal predecessors, (14328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 14328 transitions. [2022-12-14 15:50:56,956 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 14328 transitions. Word has length 8 [2022-12-14 15:50:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:56,957 INFO L495 AbstractCegarLoop]: Abstraction has 4116 states and 14328 transitions. [2022-12-14 15:50:56,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 14328 transitions. [2022-12-14 15:50:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 15:50:56,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:56,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:50:56,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 15:50:57,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:57,159 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:57,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:57,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1120095372, now seen corresponding path program 1 times [2022-12-14 15:50:57,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:57,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635494109] [2022-12-14 15:50:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:57,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:57,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:57,164 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:57,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 15:50:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:57,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:50:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:57,376 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 15:50:57,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-14 15:50:57,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:57,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 15:50:57,440 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:50:57,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 15:50:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:50:57,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:57,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:57,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635494109] [2022-12-14 15:50:57,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635494109] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:57,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:57,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:50:57,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878271619] [2022-12-14 15:50:57,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:57,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:50:57,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:50:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:50:57,486 INFO L87 Difference]: Start difference. First operand 4116 states and 14328 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:57,815 INFO L93 Difference]: Finished difference Result 3885 states and 13612 transitions. [2022-12-14 15:50:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:50:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 15:50:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:57,825 INFO L225 Difference]: With dead ends: 3885 [2022-12-14 15:50:57,825 INFO L226 Difference]: Without dead ends: 3885 [2022-12-14 15:50:57,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:50:57,825 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:57,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:50:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2022-12-14 15:50:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3885. [2022-12-14 15:50:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3477 states have (on average 3.914869140063273) internal successors, (13612), 3884 states have internal predecessors, (13612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 13612 transitions. [2022-12-14 15:50:57,881 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 13612 transitions. Word has length 8 [2022-12-14 15:50:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:57,881 INFO L495 AbstractCegarLoop]: Abstraction has 3885 states and 13612 transitions. [2022-12-14 15:50:57,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 13612 transitions. [2022-12-14 15:50:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 15:50:57,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:57,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:50:57,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-14 15:50:58,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:58,083 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash 129609930, now seen corresponding path program 1 times [2022-12-14 15:50:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:58,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085351451] [2022-12-14 15:50:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:58,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:58,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:58,090 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:58,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 15:50:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:50:58,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:58,307 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 15:50:58,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 15:50:58,331 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:50:58,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 15:50:58,349 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:50:58,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 15:50:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:50:58,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:50:58,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:50:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085351451] [2022-12-14 15:50:58,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085351451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:50:58,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:50:58,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:50:58,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213129560] [2022-12-14 15:50:58,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:50:58,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:50:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:50:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:50:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:50:58,364 INFO L87 Difference]: Start difference. First operand 3885 states and 13612 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:50:58,663 INFO L93 Difference]: Finished difference Result 2957 states and 10376 transitions. [2022-12-14 15:50:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:50:58,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 15:50:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:50:58,673 INFO L225 Difference]: With dead ends: 2957 [2022-12-14 15:50:58,673 INFO L226 Difference]: Without dead ends: 2957 [2022-12-14 15:50:58,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:50:58,674 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:50:58,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:50:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-12-14 15:50:58,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2957. [2022-12-14 15:50:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2709 states have (on average 3.8301956441491325) internal successors, (10376), 2956 states have internal predecessors, (10376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 10376 transitions. [2022-12-14 15:50:58,734 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 10376 transitions. Word has length 9 [2022-12-14 15:50:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:50:58,734 INFO L495 AbstractCegarLoop]: Abstraction has 2957 states and 10376 transitions. [2022-12-14 15:50:58,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:50:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 10376 transitions. [2022-12-14 15:50:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 15:50:58,735 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:50:58,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:50:58,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-14 15:50:58,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:58,936 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:50:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:50:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash 129609931, now seen corresponding path program 1 times [2022-12-14 15:50:58,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:50:58,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598341883] [2022-12-14 15:50:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:50:58,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:50:58,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:50:58,937 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:50:58,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 15:50:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:50:59,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 15:50:59,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:50:59,179 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:50:59,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:50:59,282 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 15:50:59,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 15:50:59,387 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:50:59,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 15:50:59,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:50:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:50:59,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:50:59,447 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:50:59,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 15:50:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:50:59,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:51:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:51:10,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:51:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598341883] [2022-12-14 15:51:10,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598341883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:51:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047460705] [2022-12-14 15:51:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:10,265 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:51:10,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:51:10,266 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:51:10,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 15:51:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:51:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:51:10,557 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:51:10,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:51:10,648 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 15:51:10,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 15:51:10,793 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:51:10,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 15:51:10,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:51:10,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:51:10,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:51:10,844 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:51:10,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 15:51:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:51:10,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:51:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:51:15,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1047460705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:51:15,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468801062] [2022-12-14 15:51:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:51:15,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:51:15,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:51:15,987 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:51:15,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 15:51:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:51:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:51:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:51:16,157 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:51:16,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:51:16,245 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:51:16,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 15:51:16,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:51:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:51:16,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:51:16,312 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:51:16,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 15:51:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:51:16,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:51:20,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:51:20,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 172 [2022-12-14 15:51:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:51:25,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468801062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:51:25,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:51:25,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 15:51:25,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405882039] [2022-12-14 15:51:25,819 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:51:25,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 15:51:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:51:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 15:51:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=213, Unknown=4, NotChecked=0, Total=272 [2022-12-14 15:51:25,820 INFO L87 Difference]: Start difference. First operand 2957 states and 10376 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:51:54,364 WARN L233 SmtUtils]: Spent 28.18s on a formula simplification. DAG size of input: 55 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:52:21,109 WARN L233 SmtUtils]: Spent 25.38s on a formula simplification. DAG size of input: 72 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:52:52,632 WARN L233 SmtUtils]: Spent 30.51s on a formula simplification. DAG size of input: 72 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:53:15,504 WARN L233 SmtUtils]: Spent 14.38s on a formula simplification. DAG size of input: 54 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:53:43,665 WARN L233 SmtUtils]: Spent 27.09s on a formula simplification. DAG size of input: 74 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:53:58,923 WARN L233 SmtUtils]: Spent 14.73s on a formula simplification. DAG size of input: 71 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:54:35,068 WARN L233 SmtUtils]: Spent 34.09s on a formula simplification. DAG size of input: 78 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:54:57,802 WARN L233 SmtUtils]: Spent 20.57s on a formula simplification. DAG size of input: 71 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:55:12,233 WARN L233 SmtUtils]: Spent 12.54s on a formula simplification. DAG size of input: 73 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:55:35,136 WARN L233 SmtUtils]: Spent 18.88s on a formula simplification. DAG size of input: 77 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:56:04,686 WARN L233 SmtUtils]: Spent 25.27s on a formula simplification. DAG size of input: 78 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:56:32,135 WARN L233 SmtUtils]: Spent 25.38s on a formula simplification. DAG size of input: 64 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:56:51,745 WARN L233 SmtUtils]: Spent 16.67s on a formula simplification. DAG size of input: 77 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:57:07,578 WARN L233 SmtUtils]: Spent 12.45s on a formula simplification. DAG size of input: 63 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:57:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:09,596 INFO L93 Difference]: Finished difference Result 45645 states and 160150 transitions. [2022-12-14 15:57:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 15:57:09,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 15:57:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:09,746 INFO L225 Difference]: With dead ends: 45645 [2022-12-14 15:57:09,746 INFO L226 Difference]: Without dead ends: 45645 [2022-12-14 15:57:09,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 355.5s TimeCoverageRelationStatistics Valid=518, Invalid=1545, Unknown=7, NotChecked=0, Total=2070 [2022-12-14 15:57:09,747 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2299 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:09,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2299 Valid, 0 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-12-14 15:57:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45645 states. [2022-12-14 15:57:10,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45645 to 3172. [2022-12-14 15:57:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3172 states, 2959 states have (on average 3.9482933423453868) internal successors, (11683), 3171 states have internal predecessors, (11683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 11683 transitions. [2022-12-14 15:57:10,096 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 11683 transitions. Word has length 9 [2022-12-14 15:57:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:10,096 INFO L495 AbstractCegarLoop]: Abstraction has 3172 states and 11683 transitions. [2022-12-14 15:57:10,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 11683 transitions. [2022-12-14 15:57:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 15:57:10,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:10,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:10,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 15:57:10,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-12-14 15:57:10,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-12-14 15:57:10,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:57:10,700 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 15:57:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash 129610014, now seen corresponding path program 1 times [2022-12-14 15:57:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:57:10,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113205029] [2022-12-14 15:57:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:10,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:57:10,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:57:10,706 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:57:10,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 15:57:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:57:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:10,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 15:57:10,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 15:57:10,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:57:10,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:57:10,961 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:57:10,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 15:57:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:11,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:57:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:15,528 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:57:15,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113205029] [2022-12-14 15:57:15,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113205029] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:57:15,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [14435920] [2022-12-14 15:57:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:15,528 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:57:15,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:57:15,529 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:57:15,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 15:57:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:15,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:57:15,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:15,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 15:57:15,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 15:57:15,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:57:15,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:57:15,876 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:57:15,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 15:57:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:15,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:57:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:16,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [14435920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:57:16,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279270906] [2022-12-14 15:57:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:16,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:16,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:57:16,104 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:57:16,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 15:57:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:16,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:57:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:16,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 15:57:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:57:16,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 15:57:16,293 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:57:16,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 15:57:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:16,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:57:16,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:57:16,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 63 [2022-12-14 15:57:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:18,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279270906] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:57:18,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:57:18,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 13 [2022-12-14 15:57:18,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684858061] [2022-12-14 15:57:18,944 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:57:18,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 15:57:18,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:57:18,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 15:57:18,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-12-14 15:57:18,944 INFO L87 Difference]: Start difference. First operand 3172 states and 11683 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:43,653 WARN L233 SmtUtils]: Spent 24.47s on a formula simplification. DAG size of input: 41 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:58:08,891 WARN L233 SmtUtils]: Spent 24.49s on a formula simplification. DAG size of input: 54 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:58:34,340 WARN L233 SmtUtils]: Spent 24.84s on a formula simplification. DAG size of input: 47 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:58:41,243 WARN L233 SmtUtils]: Spent 6.73s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:59:06,549 WARN L233 SmtUtils]: Spent 24.47s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:59:16,337 WARN L233 SmtUtils]: Spent 9.70s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:59:43,808 WARN L233 SmtUtils]: Spent 26.61s on a formula simplification. DAG size of input: 53 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:59:55,669 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:00:10,413 WARN L233 SmtUtils]: Spent 12.76s on a formula simplification. DAG size of input: 52 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:00:36,846 WARN L233 SmtUtils]: Spent 24.61s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:01:02,751 WARN L233 SmtUtils]: Spent 24.60s on a formula simplification. DAG size of input: 50 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:01:09,178 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 59 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:01:15,449 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:01:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:17,152 INFO L93 Difference]: Finished difference Result 49551 states and 178450 transitions. [2022-12-14 16:01:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 16:01:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 16:01:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:17,321 INFO L225 Difference]: With dead ends: 49551 [2022-12-14 16:01:17,322 INFO L226 Difference]: Without dead ends: 49551 [2022-12-14 16:01:17,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 235.0s TimeCoverageRelationStatistics Valid=431, Invalid=1290, Unknown=1, NotChecked=0, Total=1722 [2022-12-14 16:01:17,322 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1381 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:17,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1381 Valid, 0 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-12-14 16:01:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49551 states. [2022-12-14 16:01:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49551 to 3774. [2022-12-14 16:01:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3774 states, 3596 states have (on average 4.097052280311457) internal successors, (14733), 3773 states have internal predecessors, (14733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3774 states to 3774 states and 14733 transitions. [2022-12-14 16:01:17,755 INFO L78 Accepts]: Start accepts. Automaton has 3774 states and 14733 transitions. Word has length 9 [2022-12-14 16:01:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:17,756 INFO L495 AbstractCegarLoop]: Abstraction has 3774 states and 14733 transitions. [2022-12-14 16:01:17,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3774 states and 14733 transitions. [2022-12-14 16:01:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 16:01:17,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:17,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:01:17,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-12-14 16:01:17,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 16:01:18,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 16:01:18,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:01:18,359 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 16:01:18,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash 129610016, now seen corresponding path program 1 times [2022-12-14 16:01:18,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:01:18,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315093755] [2022-12-14 16:01:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:18,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:18,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:01:18,365 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:01:18,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 16:01:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 16:01:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:18,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 16:01:18,570 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 16:01:18,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 16:01:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:01:18,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:01:18,589 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:01:18,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315093755] [2022-12-14 16:01:18,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315093755] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:01:18,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:01:18,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:01:18,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468378664] [2022-12-14 16:01:18,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:01:18,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:01:18,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:01:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:01:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:01:18,591 INFO L87 Difference]: Start difference. First operand 3774 states and 14733 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:18,921 INFO L93 Difference]: Finished difference Result 2976 states and 11193 transitions. [2022-12-14 16:01:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:01:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 16:01:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:18,928 INFO L225 Difference]: With dead ends: 2976 [2022-12-14 16:01:18,928 INFO L226 Difference]: Without dead ends: 2976 [2022-12-14 16:01:18,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:01:18,928 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:18,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:01:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2022-12-14 16:01:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2976. [2022-12-14 16:01:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2889 states have (on average 3.8743509865005192) internal successors, (11193), 2975 states have internal predecessors, (11193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 11193 transitions. [2022-12-14 16:01:18,985 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 11193 transitions. Word has length 9 [2022-12-14 16:01:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:18,985 INFO L495 AbstractCegarLoop]: Abstraction has 2976 states and 11193 transitions. [2022-12-14 16:01:18,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 11193 transitions. [2022-12-14 16:01:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 16:01:18,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:18,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:01:18,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 16:01:19,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:19,187 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 16:01:19,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash 363209581, now seen corresponding path program 1 times [2022-12-14 16:01:19,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:01:19,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435717051] [2022-12-14 16:01:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:19,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:01:19,193 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:01:19,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 16:01:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:19,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 16:01:19,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:19,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 16:01:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:19,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:01:19,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:01:19,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435717051] [2022-12-14 16:01:19,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435717051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:01:19,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:01:19,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:01:19,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495677740] [2022-12-14 16:01:19,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:01:19,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:01:19,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:01:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:01:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:01:19,366 INFO L87 Difference]: Start difference. First operand 2976 states and 11193 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:19,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:19,685 INFO L93 Difference]: Finished difference Result 2162 states and 8079 transitions. [2022-12-14 16:01:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:01:19,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 16:01:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:19,690 INFO L225 Difference]: With dead ends: 2162 [2022-12-14 16:01:19,690 INFO L226 Difference]: Without dead ends: 2162 [2022-12-14 16:01:19,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:01:19,691 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:19,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:01:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2022-12-14 16:01:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 2162. [2022-12-14 16:01:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2114 states have (on average 3.8216650898770106) internal successors, (8079), 2161 states have internal predecessors, (8079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 8079 transitions. [2022-12-14 16:01:19,719 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 8079 transitions. Word has length 9 [2022-12-14 16:01:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:19,719 INFO L495 AbstractCegarLoop]: Abstraction has 2162 states and 8079 transitions. [2022-12-14 16:01:19,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 8079 transitions. [2022-12-14 16:01:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 16:01:19,720 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:19,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:01:19,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 16:01:19,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:19,922 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 16:01:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash 363209582, now seen corresponding path program 1 times [2022-12-14 16:01:19,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:01:19,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626568611] [2022-12-14 16:01:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:19,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:19,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:01:19,927 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:01:19,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 16:01:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 16:01:20,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:20,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 16:01:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:20,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:01:20,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:01:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626568611] [2022-12-14 16:01:20,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626568611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:01:20,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:01:20,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:01:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385811445] [2022-12-14 16:01:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:01:20,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:01:20,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:01:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:01:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:01:20,115 INFO L87 Difference]: Start difference. First operand 2162 states and 8079 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:20,880 INFO L93 Difference]: Finished difference Result 3790 states and 14367 transitions. [2022-12-14 16:01:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:01:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 16:01:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:20,889 INFO L225 Difference]: With dead ends: 3790 [2022-12-14 16:01:20,890 INFO L226 Difference]: Without dead ends: 3790 [2022-12-14 16:01:20,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:01:20,890 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 130 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:20,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 16:01:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-12-14 16:01:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 2364. [2022-12-14 16:01:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2316 states have (on average 3.99006908462867) internal successors, (9241), 2363 states have internal predecessors, (9241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 9241 transitions. [2022-12-14 16:01:20,929 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 9241 transitions. Word has length 9 [2022-12-14 16:01:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:20,930 INFO L495 AbstractCegarLoop]: Abstraction has 2364 states and 9241 transitions. [2022-12-14 16:01:20,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 9241 transitions. [2022-12-14 16:01:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 16:01:20,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:20,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:01:20,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 16:01:21,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:21,131 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 16:01:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash 363209317, now seen corresponding path program 1 times [2022-12-14 16:01:21,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:01:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22985017] [2022-12-14 16:01:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:21,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:21,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:01:21,136 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:01:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 16:01:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:21,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:01:21,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:21,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:01:21,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:01:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22985017] [2022-12-14 16:01:21,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22985017] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:01:21,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:01:21,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:01:21,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783746924] [2022-12-14 16:01:21,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:01:21,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:01:21,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:01:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:01:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:01:21,354 INFO L87 Difference]: Start difference. First operand 2364 states and 9241 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:22,008 INFO L93 Difference]: Finished difference Result 2532 states and 9670 transitions. [2022-12-14 16:01:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:01:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 16:01:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:22,014 INFO L225 Difference]: With dead ends: 2532 [2022-12-14 16:01:22,014 INFO L226 Difference]: Without dead ends: 2532 [2022-12-14 16:01:22,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:01:22,015 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:22,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:01:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-12-14 16:01:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2472. [2022-12-14 16:01:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2424 states have (on average 3.941006600660066) internal successors, (9553), 2471 states have internal predecessors, (9553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 9553 transitions. [2022-12-14 16:01:22,062 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 9553 transitions. Word has length 9 [2022-12-14 16:01:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:22,062 INFO L495 AbstractCegarLoop]: Abstraction has 2472 states and 9553 transitions. [2022-12-14 16:01:22,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 9553 transitions. [2022-12-14 16:01:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 16:01:22,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:22,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:01:22,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 16:01:22,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:22,265 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 16:01:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:22,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1102474571, now seen corresponding path program 1 times [2022-12-14 16:01:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:01:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487830082] [2022-12-14 16:01:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:22,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:22,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:01:22,271 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:01:22,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 16:01:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:01:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 16:01:22,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:01:22,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:01:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487830082] [2022-12-14 16:01:22,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487830082] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:01:22,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:01:22,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:01:22,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468334648] [2022-12-14 16:01:22,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:01:22,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 16:01:22,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:01:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 16:01:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:01:22,620 INFO L87 Difference]: Start difference. First operand 2472 states and 9553 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:23,478 INFO L93 Difference]: Finished difference Result 3226 states and 12021 transitions. [2022-12-14 16:01:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:01:23,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 16:01:23,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:23,486 INFO L225 Difference]: With dead ends: 3226 [2022-12-14 16:01:23,486 INFO L226 Difference]: Without dead ends: 3226 [2022-12-14 16:01:23,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:01:23,486 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:23,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 16:01:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2022-12-14 16:01:23,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2814. [2022-12-14 16:01:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2766 states have (on average 3.9251626898047722) internal successors, (10857), 2813 states have internal predecessors, (10857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 10857 transitions. [2022-12-14 16:01:23,526 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 10857 transitions. Word has length 10 [2022-12-14 16:01:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:23,526 INFO L495 AbstractCegarLoop]: Abstraction has 2814 states and 10857 transitions. [2022-12-14 16:01:23,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:01:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 10857 transitions. [2022-12-14 16:01:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 16:01:23,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:23,526 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-12-14 16:01:23,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 16:01:23,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:23,728 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 16:01:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:23,729 INFO L85 PathProgramCache]: Analyzing trace with hash 767853977, now seen corresponding path program 1 times [2022-12-14 16:01:23,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:01:23,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505981986] [2022-12-14 16:01:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:23,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:01:23,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:01:23,733 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:01:23,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 16:01:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 16:01:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:23,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 16:01:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:24,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:01:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:26,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:01:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505981986] [2022-12-14 16:01:26,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505981986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:01:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [552729505] [2022-12-14 16:01:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:26,364 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:01:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:01:26,365 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:01:26,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 16:01:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:26,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 16:01:26,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:26,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 16:01:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:26,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:01:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:28,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [552729505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:01:28,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076635299] [2022-12-14 16:01:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:28,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:01:28,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:01:28,980 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:01:28,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 16:01:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:29,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 16:01:29,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:29,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 16:01:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:29,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:01:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:29,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076635299] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:01:29,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:01:29,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 36 [2022-12-14 16:01:29,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762822962] [2022-12-14 16:01:29,892 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:01:29,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 16:01:29,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:01:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 16:01:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 16:01:29,894 INFO L87 Difference]: Start difference. First operand 2814 states and 10857 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 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) [2022-12-14 16:01:34,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:36,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:38,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:40,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:42,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:44,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:46,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:48,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:50,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:52,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:54,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:56,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:01:59,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:01,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:03,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:04,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:05,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:07,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:11,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:12,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:14,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:16,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:18,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:20,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:22,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:24,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:26,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:28,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:30,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:32,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:36,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:38,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:42,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:43,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:02:47,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 16:03:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:00,101 INFO L93 Difference]: Finished difference Result 29248 states and 114572 transitions. [2022-12-14 16:03:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 16:03:00,103 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 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 10 [2022-12-14 16:03:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:00,188 INFO L225 Difference]: With dead ends: 29248 [2022-12-14 16:03:00,188 INFO L226 Difference]: Without dead ends: 29248 [2022-12-14 16:03:00,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=858, Invalid=1794, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 16:03:00,189 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2881 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4414 mSolverCounterSat, 301 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2881 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 4414 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:00,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2881 Valid, 0 Invalid, 4736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 4414 Invalid, 21 Unknown, 0 Unchecked, 81.3s Time] [2022-12-14 16:03:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29248 states. [2022-12-14 16:03:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29248 to 2863. [2022-12-14 16:03:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2815 states have (on average 3.8937833037300176) internal successors, (10961), 2862 states have internal predecessors, (10961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:03:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 10961 transitions. [2022-12-14 16:03:00,384 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 10961 transitions. Word has length 10 [2022-12-14 16:03:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:00,385 INFO L495 AbstractCegarLoop]: Abstraction has 2863 states and 10961 transitions. [2022-12-14 16:03:00,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 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) [2022-12-14 16:03:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 10961 transitions. [2022-12-14 16:03:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 16:03:00,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:00,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:00,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-14 16:03:00,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 16:03:00,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-12-14 16:03:00,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 16:03:00,987 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 16:03:00,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:00,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1149682138, now seen corresponding path program 1 times [2022-12-14 16:03:00,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:03:00,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869698909] [2022-12-14 16:03:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:00,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:03:00,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:03:00,992 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:03:00,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 16:03:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:01,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 16:03:01,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:01,292 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:03:01,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:03:01,421 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 16:03:01,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 16:03:01,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:03:01,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 16:03:01,544 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 16:03:01,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 16:03:01,603 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 16:03:01,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 16:03:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:01,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:03,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:03:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869698909] [2022-12-14 16:03:03,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869698909] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1956944310] [2022-12-14 16:03:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:03,226 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:03:03,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:03:03,227 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:03:03,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 16:03:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:03,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 16:03:03,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:03,596 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:03:03,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:03:03,723 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 16:03:03,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 16:03:03,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:03:03,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 16:03:03,903 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 16:03:03,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 16:03:03,947 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 16:03:03,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 16:03:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:04,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:05,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1956944310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333675406] [2022-12-14 16:03:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:05,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:05,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:05,743 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:05,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a68c961f-42da-44d9-beb6-271f4ae41129/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 16:03:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:05,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 16:03:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:05,973 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:03:05,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:03:06,070 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 16:03:06,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 16:03:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:03:06,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 16:03:06,136 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 16:03:06,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 16:03:06,182 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 16:03:06,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 16:03:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:06,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:06,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333675406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:06,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:03:06,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 17 [2022-12-14 16:03:06,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981478840] [2022-12-14 16:03:06,947 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:03:06,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 16:03:06,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:03:06,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 16:03:06,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-12-14 16:03:06,948 INFO L87 Difference]: Start difference. First operand 2863 states and 10961 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2022-12-14 16:03:15,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 16:03:27,706 WARN L233 SmtUtils]: Spent 11.68s on a formula simplification. DAG size of input: 52 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:03:30,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 16:03:37,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 16:03:39,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 16:03:41,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 16:03:43,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 16:03:45,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 16:04:00,235 WARN L233 SmtUtils]: Spent 14.40s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:04:02,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 16:04:05,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 16:04:07,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]