./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- 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 15:37:24,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:37:24,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:37:24,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:37:24,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:37:24,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:37:24,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:37:24,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:37:24,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:37:24,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:37:24,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:37:24,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:37:24,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:37:24,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:37:24,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:37:24,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:37:24,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:37:24,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:37:24,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:37:24,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:37:24,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:37:24,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:37:24,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:37:24,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:37:24,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:37:24,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:37:24,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:37:24,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:37:24,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:37:24,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:37:24,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:37:24,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:37:24,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:37:24,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:37:24,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:37:24,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:37:24,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:37:24,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:37:24,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:37:24,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:37:24,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:37:24,793 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 15:37:24,817 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:37:24,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:37:24,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:37:24,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:37:24,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:37:24,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:37:24,818 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:37:24,818 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:37:24,818 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:37:24,818 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:37:24,818 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:37:24,819 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:37:24,819 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:37:24,819 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:37:24,819 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:37:24,819 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:37:24,819 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:37:24,819 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:37:24,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 15:37:24,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 15:37:24,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:37:24,820 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:37:24,820 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 15:37:24,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:37:24,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:37:24,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:37:24,821 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 15:37:24,821 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 15:37:24,821 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 15:37:24,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:37:24,821 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 15:37:24,821 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:37:24,821 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:37:24,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:37:24,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:37:24,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:37:24,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:37:24,827 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:37:24,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:37:24,827 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:37:24,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:37:24,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:37:24,828 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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-12-14 15:37:25,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:37:25,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:37:25,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:37:25,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:37:25,040 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:37:25,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-12-14 15:37:27,693 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:37:27,845 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:37:27,845 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-12-14 15:37:27,851 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/data/20c190302/8ac8a1c98e3744e5932870e8a12dada5/FLAG4013499b4 [2022-12-14 15:37:27,865 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/data/20c190302/8ac8a1c98e3744e5932870e8a12dada5 [2022-12-14 15:37:27,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:37:27,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:37:27,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:37:27,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:37:27,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:37:27,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:37:27" (1/1) ... [2022-12-14 15:37:27,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9706ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:27, skipping insertion in model container [2022-12-14 15:37:27,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:37:27" (1/1) ... [2022-12-14 15:37:27,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:37:27,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:37:27,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:37:28,000 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:37:28,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:37:28,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:37:28,009 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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-12-14 15:37:28,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:37:28,024 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 15:37:28,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a582a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:28, skipping insertion in model container [2022-12-14 15:37:28,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:37:28,025 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 15:37:28,026 INFO L158 Benchmark]: Toolchain (without parser) took 156.73ms. Allocated memory is still 140.5MB. Free memory was 87.0MB in the beginning and 77.2MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 15:37:28,026 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 84.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:37:28,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.14ms. Allocated memory is still 140.5MB. Free memory was 87.0MB in the beginning and 77.2MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 15:37:28,028 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 84.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.14ms. Allocated memory is still 140.5MB. Free memory was 87.0MB in the beginning and 77.2MB 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: 97]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- 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 15:37:29,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:37:29,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:37:29,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:37:29,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:37:29,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:37:29,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:37:29,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:37:29,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:37:29,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:37:29,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:37:29,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:37:29,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:37:29,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:37:29,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:37:29,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:37:29,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:37:29,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:37:29,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:37:29,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:37:29,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:37:29,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:37:29,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:37:29,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:37:29,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:37:29,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:37:29,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:37:29,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:37:29,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:37:29,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:37:29,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:37:29,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:37:29,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:37:29,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:37:29,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:37:29,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:37:29,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:37:29,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:37:29,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:37:29,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:37:29,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:37:29,497 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 15:37:29,514 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:37:29,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:37:29,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:37:29,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:37:29,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:37:29,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:37:29,515 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:37:29,515 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:37:29,515 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:37:29,515 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:37:29,515 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:37:29,515 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:37:29,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 15:37:29,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 15:37:29,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:37:29,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:37:29,516 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 15:37:29,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:37:29,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:37:29,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:37:29,517 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 15:37:29,517 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 15:37:29,517 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 15:37:29,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:37:29,517 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 15:37:29,518 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 15:37:29,518 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 15:37:29,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:37:29,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:37:29,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:37:29,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 15:37:29,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:37:29,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:37:29,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:37:29,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:37:29,528 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 15:37:29,528 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 15:37:29,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:37:29,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 15:37:29,528 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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-12-14 15:37:29,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:37:29,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:37:29,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:37:29,781 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:37:29,781 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:37:29,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-12-14 15:37:32,433 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:37:32,568 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:37:32,569 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-12-14 15:37:32,574 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/data/a25179d7b/6a20649610bc4650b9c3589b1775ccc7/FLAG46cc94d5b [2022-12-14 15:37:32,584 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/data/a25179d7b/6a20649610bc4650b9c3589b1775ccc7 [2022-12-14 15:37:32,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:37:32,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:37:32,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:37:32,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:37:32,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:37:32,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325cd1b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32, skipping insertion in model container [2022-12-14 15:37:32,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:37:32,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:37:32,755 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:37:32,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:37:32,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:37:32,765 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:37:32,772 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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-12-14 15:37:32,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:37:32,794 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 15:37:32,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:37:32,804 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:37:32,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:37:32,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:37:32,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:37:32,813 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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-12-14 15:37:32,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:37:32,822 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:37:32,834 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:37:32,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:37:32,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:37:32,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:37:32,843 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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-12-14 15:37:32,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:37:32,862 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:37:32,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32 WrapperNode [2022-12-14 15:37:32,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:37:32,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:37:32,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:37:32,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:37:32,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,910 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 188 [2022-12-14 15:37:32,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:37:32,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:37:32,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:37:32,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:37:32,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,951 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:37:32,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:37:32,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:37:32,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:37:32,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (1/1) ... [2022-12-14 15:37:32,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:37:32,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:37:32,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:37:32,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:37:33,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:37:33,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 15:37:33,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:37:33,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 15:37:33,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 15:37:33,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 15:37:33,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 15:37:33,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 15:37:33,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 15:37:33,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 15:37:33,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 15:37:33,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:37:33,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:37:33,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:37:33,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 15:37:33,016 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 15:37:33,113 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:37:33,114 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:37:33,627 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:37:33,828 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:37:33,828 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 15:37:33,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:37:33 BoogieIcfgContainer [2022-12-14 15:37:33,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:37:33,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:37:33,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:37:33,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:37:33,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:37:32" (1/3) ... [2022-12-14 15:37:33,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aecd24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:37:33, skipping insertion in model container [2022-12-14 15:37:33,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:37:32" (2/3) ... [2022-12-14 15:37:33,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aecd24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:37:33, skipping insertion in model container [2022-12-14 15:37:33,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:37:33" (3/3) ... [2022-12-14 15:37:33,836 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-12-14 15:37:33,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:37:33,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-14 15:37:33,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 15:37:33,952 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 15:37:33,985 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 15:37:34,000 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 196 transitions, 408 flow [2022-12-14 15:37:34,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 196 transitions, 408 flow [2022-12-14 15:37:34,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 196 transitions, 408 flow [2022-12-14 15:37:34,078 INFO L130 PetriNetUnfolder]: 13/194 cut-off events. [2022-12-14 15:37:34,078 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 15:37:34,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 13/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 264 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 142. Up to 2 conditions per place. [2022-12-14 15:37:34,085 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2022-12-14 15:37:59,942 INFO L134 LiptonReduction]: Checked pairs total: 2429 [2022-12-14 15:37:59,942 INFO L136 LiptonReduction]: Total number of compositions: 203 [2022-12-14 15:37:59,947 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 55 transitions, 126 flow [2022-12-14 15:37:59,984 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 793 states, 379 states have (on average 5.493403693931398) internal successors, (2082), 792 states have internal predecessors, (2082), 0 states have call successors, (0), 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 15:37:59,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:38:00,001 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;@7688a85c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:38:00,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2022-12-14 15:38:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 793 states, 379 states have (on average 5.493403693931398) internal successors, (2082), 792 states have internal predecessors, (2082), 0 states have call successors, (0), 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 15:38:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 15:38:00,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:00,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 15:38:00,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:00,011 INFO L85 PathProgramCache]: Analyzing trace with hash 30334, now seen corresponding path program 1 times [2022-12-14 15:38:00,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:00,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280605104] [2022-12-14 15:38:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:00,020 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 15:38:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:00,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:00,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:00,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:38:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:00,175 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 15:38:00,176 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 15:38:00,196 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 15:38:00,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:00,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:00,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280605104] [2022-12-14 15:38:00,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280605104] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:00,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:00,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:38:00,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215775636] [2022-12-14 15:38:00,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:00,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:38:00,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:00,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:38:00,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:38:00,229 INFO L87 Difference]: Start difference. First operand has 793 states, 379 states have (on average 5.493403693931398) internal successors, (2082), 792 states have internal predecessors, (2082), 0 states have call successors, (0), 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 15:38:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:00,423 INFO L93 Difference]: Finished difference Result 262 states and 663 transitions. [2022-12-14 15:38:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:38:00,424 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 15:38:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:00,432 INFO L225 Difference]: With dead ends: 262 [2022-12-14 15:38:00,432 INFO L226 Difference]: Without dead ends: 262 [2022-12-14 15:38:00,433 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 15:38:00,435 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:00,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-12-14 15:38:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-12-14 15:38:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 163 states have (on average 4.067484662576687) internal successors, (663), 261 states have internal predecessors, (663), 0 states have call successors, (0), 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 15:38:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 663 transitions. [2022-12-14 15:38:00,476 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 663 transitions. Word has length 2 [2022-12-14 15:38:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:00,476 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 663 transitions. [2022-12-14 15:38:00,476 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 15:38:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 663 transitions. [2022-12-14 15:38:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 15:38:00,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:00,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 15:38:00,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:00,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:00,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash 30335, now seen corresponding path program 1 times [2022-12-14 15:38:00,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:00,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491953908] [2022-12-14 15:38:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:00,683 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 15:38:00,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:00,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:00,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:00,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:38:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:00,878 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:00,878 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:00,902 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 15:38:00,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:00,903 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:00,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491953908] [2022-12-14 15:38:00,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491953908] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:00,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:00,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:38:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114660684] [2022-12-14 15:38:00,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:00,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:38:00,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:38:00,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:38:00,905 INFO L87 Difference]: Start difference. First operand 262 states and 663 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 15:38:01,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:01,202 INFO L93 Difference]: Finished difference Result 521 states and 1323 transitions. [2022-12-14 15:38:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:38:01,203 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 15:38:01,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:01,206 INFO L225 Difference]: With dead ends: 521 [2022-12-14 15:38:01,206 INFO L226 Difference]: Without dead ends: 521 [2022-12-14 15:38:01,207 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 15:38:01,208 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:01,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 4 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:38:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-12-14 15:38:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 264. [2022-12-14 15:38:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 165 states have (on average 4.054545454545455) internal successors, (669), 263 states have internal predecessors, (669), 0 states have call successors, (0), 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 15:38:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 669 transitions. [2022-12-14 15:38:01,228 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 669 transitions. Word has length 2 [2022-12-14 15:38:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:01,229 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 669 transitions. [2022-12-14 15:38:01,229 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 15:38:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 669 transitions. [2022-12-14 15:38:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 15:38:01,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:01,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 15:38:01,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:01,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:01,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash 943967, now seen corresponding path program 1 times [2022-12-14 15:38:01,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:01,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072639022] [2022-12-14 15:38:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:01,437 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 15:38:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:01,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:01,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:01,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:38:01,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:01,629 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:01,630 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:01,679 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 15:38:01,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:01,871 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 15:38:01,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:01,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072639022] [2022-12-14 15:38:01,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072639022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:01,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [872301042] [2022-12-14 15:38:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:01,872 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:38:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:38:01,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:38:01,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 15:38:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:01,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:38:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:02,039 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:02,039 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:02,067 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 15:38:02,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:02,124 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 15:38:02,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [872301042] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:02,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164796697] [2022-12-14 15:38:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:02,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:02,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:02,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:02,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:38:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:02,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:38:02,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:02,237 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:02,237 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:02,269 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 15:38:02,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:02,386 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 15:38:02,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164796697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:02,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:38:02,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 15:38:02,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208227333] [2022-12-14 15:38:02,387 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:38:02,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:38:02,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:38:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:38:02,388 INFO L87 Difference]: Start difference. First operand 264 states and 669 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 15:38:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:04,626 INFO L93 Difference]: Finished difference Result 1041 states and 2649 transitions. [2022-12-14 15:38:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:38:04,627 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 15:38:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:04,631 INFO L225 Difference]: With dead ends: 1041 [2022-12-14 15:38:04,631 INFO L226 Difference]: Without dead ends: 1041 [2022-12-14 15:38:04,631 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 15:38:04,632 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 183 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:04,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 12 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 15:38:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-12-14 15:38:04,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 270. [2022-12-14 15:38:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 171 states have (on average 4.017543859649122) internal successors, (687), 269 states have internal predecessors, (687), 0 states have call successors, (0), 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 15:38:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 687 transitions. [2022-12-14 15:38:04,649 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 687 transitions. Word has length 3 [2022-12-14 15:38:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:04,649 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 687 transitions. [2022-12-14 15:38:04,650 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 15:38:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 687 transitions. [2022-12-14 15:38:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 15:38:04,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:04,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 15:38:04,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:04,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:05,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:38:05,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:05,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:05,255 INFO L85 PathProgramCache]: Analyzing trace with hash 945197, now seen corresponding path program 1 times [2022-12-14 15:38:05,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:05,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895216501] [2022-12-14 15:38:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:05,256 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 15:38:05,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:05,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:05,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:05,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:38:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:05,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:05,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:05,422 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:38:05,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-14 15:38:05,439 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 10 treesize of output 8 [2022-12-14 15:38:05,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:05,478 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 15:38:05,503 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 15:38:05,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:05,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:05,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895216501] [2022-12-14 15:38:05,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895216501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:05,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:05,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:38:05,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278218446] [2022-12-14 15:38:05,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:05,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:05,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:38:05,504 INFO L87 Difference]: Start difference. First operand 270 states and 687 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 15:38:05,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:05,663 INFO L93 Difference]: Finished difference Result 220 states and 535 transitions. [2022-12-14 15:38:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:38:05,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have 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 15:38:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:05,665 INFO L225 Difference]: With dead ends: 220 [2022-12-14 15:38:05,665 INFO L226 Difference]: Without dead ends: 220 [2022-12-14 15:38:05,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 15:38:05,665 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:05,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 2 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-12-14 15:38:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-12-14 15:38:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 147 states have (on average 3.639455782312925) internal successors, (535), 219 states have internal predecessors, (535), 0 states have call successors, (0), 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 15:38:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 535 transitions. [2022-12-14 15:38:05,670 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 535 transitions. Word has length 3 [2022-12-14 15:38:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:05,670 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 535 transitions. [2022-12-14 15:38:05,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 15:38:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 535 transitions. [2022-12-14 15:38:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 15:38:05,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:05,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 15:38:05,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:05,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:05,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:05,874 INFO L85 PathProgramCache]: Analyzing trace with hash 945198, now seen corresponding path program 1 times [2022-12-14 15:38:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:05,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748805414] [2022-12-14 15:38:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:05,876 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 15:38:05,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:05,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:05,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:38:05,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:05,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:05,992 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 15:38:05,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-14 15:38:06,037 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:38:06,037 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 15:38:06,053 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 15:38:06,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:06,053 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:06,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748805414] [2022-12-14 15:38:06,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748805414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:06,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:06,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:38:06,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022352696] [2022-12-14 15:38:06,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:06,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:38:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:38:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:38:06,055 INFO L87 Difference]: Start difference. First operand 220 states and 535 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 15:38:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:06,217 INFO L93 Difference]: Finished difference Result 170 states and 383 transitions. [2022-12-14 15:38:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:38:06,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have 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 15:38:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:06,218 INFO L225 Difference]: With dead ends: 170 [2022-12-14 15:38:06,218 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 15:38:06,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 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 15:38:06,220 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:06,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 15:38:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-12-14 15:38:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 123 states have (on average 3.113821138211382) internal successors, (383), 169 states have internal predecessors, (383), 0 states have call successors, (0), 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 15:38:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 383 transitions. [2022-12-14 15:38:06,225 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 383 transitions. Word has length 3 [2022-12-14 15:38:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:06,226 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 383 transitions. [2022-12-14 15:38:06,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 15:38:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 383 transitions. [2022-12-14 15:38:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 15:38:06,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:06,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 15:38:06,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:06,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:06,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:06,430 INFO L85 PathProgramCache]: Analyzing trace with hash 908359353, now seen corresponding path program 1 times [2022-12-14 15:38:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:06,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490027815] [2022-12-14 15:38:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:06,432 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 15:38:06,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:06,435 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:06,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:06,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:38:06,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:06,598 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 15:38:06,599 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-12-14 15:38:06,622 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:38:06,622 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 15:38:06,631 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 15:38:06,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:06,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490027815] [2022-12-14 15:38:06,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490027815] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:06,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:06,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:38:06,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619564243] [2022-12-14 15:38:06,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:06,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:38:06,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:38:06,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:38:06,633 INFO L87 Difference]: Start difference. First operand 170 states and 383 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 15:38:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:06,756 INFO L93 Difference]: Finished difference Result 156 states and 355 transitions. [2022-12-14 15:38:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:38:06,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 15:38:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:06,757 INFO L225 Difference]: With dead ends: 156 [2022-12-14 15:38:06,757 INFO L226 Difference]: Without dead ends: 156 [2022-12-14 15:38:06,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 15:38:06,757 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:06,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:38:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-12-14 15:38:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-12-14 15:38:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 119 states have (on average 2.9831932773109244) internal successors, (355), 155 states have internal predecessors, (355), 0 states have call successors, (0), 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 15:38:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2022-12-14 15:38:06,760 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 5 [2022-12-14 15:38:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:06,761 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2022-12-14 15:38:06,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 15:38:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2022-12-14 15:38:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 15:38:06,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:06,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 15:38:06,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:06,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:06,963 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash 908359354, now seen corresponding path program 1 times [2022-12-14 15:38:06,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:06,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095884845] [2022-12-14 15:38:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:06,973 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 15:38:06,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:06,976 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:06,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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)] Waiting until timeout for monitored process [2022-12-14 15:38:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:07,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:38:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:07,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:07,121 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:38:07,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-14 15:38:07,127 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 15:38:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:07,155 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 15:38:07,202 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 15:38:07,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:07,202 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:07,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095884845] [2022-12-14 15:38:07,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095884845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:07,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:07,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:38:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078724153] [2022-12-14 15:38:07,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:07,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:07,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:07,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:38:07,204 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 15:38:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:07,377 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2022-12-14 15:38:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:38:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 15:38:07,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:07,379 INFO L225 Difference]: With dead ends: 142 [2022-12-14 15:38:07,379 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 15:38:07,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 15:38:07,380 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:07,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:07,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 15:38:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-12-14 15:38:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 115 states have (on average 2.8434782608695652) internal successors, (327), 141 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:38:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 327 transitions. [2022-12-14 15:38:07,385 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 327 transitions. Word has length 5 [2022-12-14 15:38:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:07,385 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 327 transitions. [2022-12-14 15:38:07,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 15:38:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 327 transitions. [2022-12-14 15:38:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:38:07,386 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:07,386 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 15:38:07,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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)] Ended with exit code 0 [2022-12-14 15:38:07,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:07,588 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:07,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1939493249, now seen corresponding path program 2 times [2022-12-14 15:38:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:07,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508681604] [2022-12-14 15:38:07,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:38:07,591 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 15:38:07,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:07,594 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:07,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (11)] Waiting until timeout for monitored process [2022-12-14 15:38:07,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:38:07,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:38:07,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:38:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:07,720 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:07,720 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:07,827 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 15:38:07,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:08,503 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 15:38:08,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:08,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508681604] [2022-12-14 15:38:08,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508681604] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:08,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116892579] [2022-12-14 15:38:08,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:38:08,504 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:38:08,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:38:08,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:38:08,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 15:38:08,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:38:08,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:38:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:38:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:08,701 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:08,701 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:08,764 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 15:38:08,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:08,899 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 15:38:08,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116892579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:08,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141123560] [2022-12-14 15:38:08,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:38:08,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:08,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:08,901 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:08,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:38:08,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:38:08,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:38:08,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:38:08,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:09,047 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:09,048 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:09,106 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 15:38:09,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:09,243 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 15:38:09,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141123560] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:09,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:38:09,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-12-14 15:38:09,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146749316] [2022-12-14 15:38:09,244 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:38:09,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:38:09,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:09,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:38:09,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:38:09,245 INFO L87 Difference]: Start difference. First operand 142 states and 327 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 15:38:12,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:38:14,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:38:17,066 WARN L539 Checker$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 15:38:18,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:38:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:21,313 INFO L93 Difference]: Finished difference Result 1186 states and 2782 transitions. [2022-12-14 15:38:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:38:21,315 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 15:38:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:21,318 INFO L225 Difference]: With dead ends: 1186 [2022-12-14 15:38:21,318 INFO L226 Difference]: Without dead ends: 1186 [2022-12-14 15:38:21,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:38:21,319 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 598 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:21,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 62 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 759 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2022-12-14 15:38:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-12-14 15:38:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 153. [2022-12-14 15:38:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 126 states have (on average 2.7777777777777777) internal successors, (350), 152 states have internal predecessors, (350), 0 states have call successors, (0), 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 15:38:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 350 transitions. [2022-12-14 15:38:21,326 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 350 transitions. Word has length 6 [2022-12-14 15:38:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:21,326 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 350 transitions. [2022-12-14 15:38:21,326 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 15:38:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 350 transitions. [2022-12-14 15:38:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:38:21,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:21,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:38:21,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:38:21,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (11)] Ended with exit code 0 [2022-12-14 15:38:21,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:21,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:38:21,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:21,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1905636924, now seen corresponding path program 1 times [2022-12-14 15:38:21,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:21,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126683631] [2022-12-14 15:38:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:21,931 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 15:38:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:21,934 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:21,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:38:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:22,098 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 15:38:22,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:22,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:22,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126683631] [2022-12-14 15:38:22,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126683631] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:22,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:22,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:38:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065362073] [2022-12-14 15:38:22,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:22,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:38:22,099 INFO L87 Difference]: Start difference. First operand 153 states and 350 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 15:38:22,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:22,326 INFO L93 Difference]: Finished difference Result 212 states and 461 transitions. [2022-12-14 15:38:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:38:22,326 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 15:38:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:22,327 INFO L225 Difference]: With dead ends: 212 [2022-12-14 15:38:22,327 INFO L226 Difference]: Without dead ends: 203 [2022-12-14 15:38:22,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:38:22,328 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:22,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-14 15:38:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2022-12-14 15:38:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 167 states have (on average 2.6167664670658684) internal successors, (437), 193 states have internal predecessors, (437), 0 states have call successors, (0), 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 15:38:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 437 transitions. [2022-12-14 15:38:22,331 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 437 transitions. Word has length 6 [2022-12-14 15:38:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:22,332 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 437 transitions. [2022-12-14 15:38:22,332 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 15:38:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 437 transitions. [2022-12-14 15:38:22,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:38:22,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:22,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:22,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:22,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:22,533 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash 39111332, now seen corresponding path program 1 times [2022-12-14 15:38:22,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:22,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180688578] [2022-12-14 15:38:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:22,533 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 15:38:22,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:22,534 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:22,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:38:22,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:22,657 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 15:38:22,658 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 15:38:22,674 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:38:22,675 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 15:38:22,689 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 15:38:22,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:22,689 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:22,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180688578] [2022-12-14 15:38:22,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180688578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:22,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:22,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:38:22,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898217797] [2022-12-14 15:38:22,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:22,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:22,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:38:22,690 INFO L87 Difference]: Start difference. First operand 194 states and 437 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 15:38:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:22,810 INFO L93 Difference]: Finished difference Result 164 states and 364 transitions. [2022-12-14 15:38:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:38:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 15:38:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:22,811 INFO L225 Difference]: With dead ends: 164 [2022-12-14 15:38:22,811 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 15:38:22,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 15:38:22,811 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:22,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:38:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 15:38:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 15:38:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 146 states have (on average 2.493150684931507) internal successors, (364), 163 states have internal predecessors, (364), 0 states have call successors, (0), 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 15:38:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 364 transitions. [2022-12-14 15:38:22,815 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 364 transitions. Word has length 7 [2022-12-14 15:38:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:22,815 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 364 transitions. [2022-12-14 15:38:22,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 15:38:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 364 transitions. [2022-12-14 15:38:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:38:22,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:22,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:22,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:23,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:23,017 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash 39111333, now seen corresponding path program 1 times [2022-12-14 15:38:23,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:23,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329313675] [2022-12-14 15:38:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:23,020 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 15:38:23,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:23,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:23,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:38:23,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:23,205 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:23,206 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:23,255 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 15:38:23,255 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 15:38:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:23,342 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 15:38:23,348 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:38:23,349 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 15:38:23,408 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 15:38:23,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:27,810 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 15:38:27,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:27,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329313675] [2022-12-14 15:38:27,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329313675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [68235852] [2022-12-14 15:38:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:27,811 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:38:27,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:38:27,812 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:38:27,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 15:38:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:38:27,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:28,005 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:28,006 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:28,046 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 15:38:28,046 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 15:38:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:28,150 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 15:38:28,162 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:38:28,162 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 15:38:28,208 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 15:38:28,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:28,376 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 15:38:28,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [68235852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:28,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011166605] [2022-12-14 15:38:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:28,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:28,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:28,378 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:28,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 15:38:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:28,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:38:28,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:28,507 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:38:28,507 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:38:28,554 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 15:38:28,554 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 15:38:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:28,599 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 15:38:28,612 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:38:28,612 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 15:38:28,654 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 15:38:28,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:28,821 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 15:38:28,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011166605] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:28,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:38:28,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-12-14 15:38:28,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655685327] [2022-12-14 15:38:28,822 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:38:28,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:38:28,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:28,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:38:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:38:28,823 INFO L87 Difference]: Start difference. First operand 164 states and 364 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:38:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:41,241 INFO L93 Difference]: Finished difference Result 894 states and 2037 transitions. [2022-12-14 15:38:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:38:41,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 15:38:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:41,244 INFO L225 Difference]: With dead ends: 894 [2022-12-14 15:38:41,244 INFO L226 Difference]: Without dead ends: 874 [2022-12-14 15:38:41,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-12-14 15:38:41,245 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 243 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:41,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 44 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 15:38:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-12-14 15:38:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 240. [2022-12-14 15:38:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 222 states have (on average 2.7927927927927927) internal successors, (620), 239 states have internal predecessors, (620), 0 states have call successors, (0), 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 15:38:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 620 transitions. [2022-12-14 15:38:41,252 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 620 transitions. Word has length 7 [2022-12-14 15:38:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:41,252 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 620 transitions. [2022-12-14 15:38:41,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:38:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 620 transitions. [2022-12-14 15:38:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:38:41,253 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:41,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:41,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:41,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:41,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:41,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:38:41,856 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash 39111338, now seen corresponding path program 1 times [2022-12-14 15:38:41,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:41,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202798536] [2022-12-14 15:38:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:41,859 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 15:38:41,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:41,862 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:41,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:38:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:41,952 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 15:38:41,963 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 15:38:41,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:41,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:41,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202798536] [2022-12-14 15:38:41,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202798536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:41,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:41,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:38:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829505945] [2022-12-14 15:38:41,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:41,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:41,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:38:41,965 INFO L87 Difference]: Start difference. First operand 240 states and 620 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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 15:38:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:42,086 INFO L93 Difference]: Finished difference Result 206 states and 499 transitions. [2022-12-14 15:38:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:38:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 15:38:42,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:42,088 INFO L225 Difference]: With dead ends: 206 [2022-12-14 15:38:42,088 INFO L226 Difference]: Without dead ends: 206 [2022-12-14 15:38:42,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 15:38:42,088 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:42,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:38:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-12-14 15:38:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-12-14 15:38:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 195 states have (on average 2.5589743589743588) internal successors, (499), 205 states have internal predecessors, (499), 0 states have call successors, (0), 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 15:38:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 499 transitions. [2022-12-14 15:38:42,092 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 499 transitions. Word has length 7 [2022-12-14 15:38:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:42,092 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 499 transitions. [2022-12-14 15:38:42,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 15:38:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 499 transitions. [2022-12-14 15:38:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:38:42,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:42,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:42,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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)] Ended with exit code 0 [2022-12-14 15:38:42,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:42,294 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:42,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:42,295 INFO L85 PathProgramCache]: Analyzing trace with hash 39111339, now seen corresponding path program 1 times [2022-12-14 15:38:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:42,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088885065] [2022-12-14 15:38:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:42,297 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 15:38:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:42,300 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:42,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (20)] Waiting until timeout for monitored process [2022-12-14 15:38:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:38:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:42,535 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 15:38:42,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:42,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:42,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088885065] [2022-12-14 15:38:42,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088885065] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:42,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:38:42,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:38:42,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153420953] [2022-12-14 15:38:42,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:42,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:42,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:42,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:42,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:38:42,536 INFO L87 Difference]: Start difference. First operand 206 states and 499 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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 15:38:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:42,754 INFO L93 Difference]: Finished difference Result 314 states and 689 transitions. [2022-12-14 15:38:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:38:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 15:38:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:42,756 INFO L225 Difference]: With dead ends: 314 [2022-12-14 15:38:42,756 INFO L226 Difference]: Without dead ends: 264 [2022-12-14 15:38:42,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 15:38:42,757 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:42,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-14 15:38:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 256. [2022-12-14 15:38:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 245 states have (on average 2.4448979591836735) internal successors, (599), 255 states have internal predecessors, (599), 0 states have call successors, (0), 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 15:38:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 599 transitions. [2022-12-14 15:38:42,764 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 599 transitions. Word has length 7 [2022-12-14 15:38:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:42,764 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 599 transitions. [2022-12-14 15:38:42,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 15:38:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 599 transitions. [2022-12-14 15:38:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 15:38:42,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:42,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:42,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (20)] Ended with exit code 0 [2022-12-14 15:38:42,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:42,966 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:42,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1213561752, now seen corresponding path program 1 times [2022-12-14 15:38:42,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:42,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342260184] [2022-12-14 15:38:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:42,969 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 15:38:42,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:42,971 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:42,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (21)] Waiting until timeout for monitored process [2022-12-14 15:38:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:38:43,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:43,109 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 15:38:43,204 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 15:38:43,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:43,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:38:43,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 62 [2022-12-14 15:38:43,744 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 15:38:43,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342260184] [2022-12-14 15:38:43,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342260184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1804938442] [2022-12-14 15:38:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:43,744 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:38:43,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:38:43,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:38:43,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 15:38:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:38:43,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:43,899 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 15:38:44,001 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 15:38:44,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:44,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:38:44,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 62 [2022-12-14 15:38:44,262 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 15:38:44,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1804938442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:44,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221584648] [2022-12-14 15:38:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:44,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:44,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:44,263 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:44,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 15:38:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:38:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:44,349 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 15:38:44,398 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 15:38:44,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:44,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:38:44,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 62 [2022-12-14 15:38:44,653 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 15:38:44,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221584648] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:44,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:38:44,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 9 [2022-12-14 15:38:44,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511497767] [2022-12-14 15:38:44,653 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:38:44,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:38:44,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:38:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:38:44,654 INFO L87 Difference]: Start difference. First operand 256 states and 599 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:38:48,855 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 15:38:49,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:49,629 INFO L93 Difference]: Finished difference Result 528 states and 1228 transitions. [2022-12-14 15:38:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:38:49,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 15:38:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:49,632 INFO L225 Difference]: With dead ends: 528 [2022-12-14 15:38:49,632 INFO L226 Difference]: Without dead ends: 505 [2022-12-14 15:38:49,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-12-14 15:38:49,633 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 154 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:49,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 17 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 15:38:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-12-14 15:38:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 380. [2022-12-14 15:38:49,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 369 states have (on average 2.6504065040650406) internal successors, (978), 379 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:38:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 978 transitions. [2022-12-14 15:38:49,640 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 978 transitions. Word has length 8 [2022-12-14 15:38:49,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:49,640 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 978 transitions. [2022-12-14 15:38:49,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 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 15:38:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 978 transitions. [2022-12-14 15:38:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 15:38:49,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:49,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:49,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:49,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (21)] Ended with exit code 0 [2022-12-14 15:38:50,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:50,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:50,243 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:38:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1034288218, now seen corresponding path program 1 times [2022-12-14 15:38:50,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:38:50,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800721439] [2022-12-14 15:38:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:50,247 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 15:38:50,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:38:50,248 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:38:50,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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)] Waiting until timeout for monitored process [2022-12-14 15:38:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:50,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:38:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:50,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:50,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:50,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 19 [2022-12-14 15:38:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:38:50,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:51,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 62 [2022-12-14 15:38:51,042 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 53 treesize of output 49 [2022-12-14 15:38:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:38:52,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:38:52,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800721439] [2022-12-14 15:38:52,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800721439] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:52,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1840700900] [2022-12-14 15:38:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:52,101 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:38:52,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:38:52,101 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:38:52,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 15:38:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:52,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:38:52,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:52,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:52,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 28 [2022-12-14 15:38:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:38:52,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:52,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 62 [2022-12-14 15:38:52,704 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 53 treesize of output 49 [2022-12-14 15:38:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:38:54,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1840700900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:54,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753861581] [2022-12-14 15:38:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:54,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:54,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:54,202 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:54,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 15:38:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:38:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:54,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:54,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:54,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:38:54,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 19 [2022-12-14 15:38:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:38:54,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:54,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 62 [2022-12-14 15:38:54,685 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 53 treesize of output 49 [2022-12-14 15:38:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:38:57,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753861581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:57,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:38:57,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 24 [2022-12-14 15:38:57,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715125423] [2022-12-14 15:38:57,025 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:38:57,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 15:38:57,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:38:57,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 15:38:57,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-12-14 15:38:57,026 INFO L87 Difference]: Start difference. First operand 380 states and 978 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:39:23,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 15:39:26,141 WARN L539 Checker$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 15:39:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:39:33,604 INFO L93 Difference]: Finished difference Result 1008 states and 2495 transitions. [2022-12-14 15:39:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 15:39:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 15:39:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:39:33,609 INFO L225 Difference]: With dead ends: 1008 [2022-12-14 15:39:33,609 INFO L226 Difference]: Without dead ends: 905 [2022-12-14 15:39:33,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=529, Invalid=2441, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 15:39:33,610 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 877 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 145 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:39:33,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 134 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1187 Invalid, 1 Unknown, 0 Unchecked, 18.1s Time] [2022-12-14 15:39:33,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-12-14 15:39:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 477. [2022-12-14 15:39:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 466 states have (on average 2.8733905579399144) internal successors, (1339), 476 states have internal predecessors, (1339), 0 states have call successors, (0), 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 15:39:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1339 transitions. [2022-12-14 15:39:33,630 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1339 transitions. Word has length 9 [2022-12-14 15:39:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:39:33,630 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 1339 transitions. [2022-12-14 15:39:33,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 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 15:39:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1339 transitions. [2022-12-14 15:39:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:39:33,631 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:39:33,631 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 15:39:33,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 15:39:33,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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)] Ended with exit code 0 [2022-12-14 15:39:34,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 15:39:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:39:34,234 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:39:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:39:34,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1970504133, now seen corresponding path program 2 times [2022-12-14 15:39:34,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:39:34,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31294454] [2022-12-14 15:39:34,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:39:34,237 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 15:39:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:39:34,239 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:39:34,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:39:34,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 15:39:34,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:39:34,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:39:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:39:34,420 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:39:34,420 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:39:34,510 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 15:39:34,510 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 15:39:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:39:34,664 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 15:39:34,686 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:39:34,686 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 15:39:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:39:34,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:39:34,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:39:34,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31294454] [2022-12-14 15:39:34,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31294454] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:39:34,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:39:34,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:39:34,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911736360] [2022-12-14 15:39:34,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:39:34,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:39:34,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:39:34,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:39:34,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:39:34,767 INFO L87 Difference]: Start difference. First operand 477 states and 1339 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 15:39:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:39:35,054 INFO L93 Difference]: Finished difference Result 507 states and 1327 transitions. [2022-12-14 15:39:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:39:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 10 [2022-12-14 15:39:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:39:35,057 INFO L225 Difference]: With dead ends: 507 [2022-12-14 15:39:35,057 INFO L226 Difference]: Without dead ends: 467 [2022-12-14 15:39:35,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:39:35,057 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:39:35,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:39:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-12-14 15:39:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 364. [2022-12-14 15:39:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 353 states have (on average 2.7790368271954673) internal successors, (981), 363 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:39:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 981 transitions. [2022-12-14 15:39:35,064 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 981 transitions. Word has length 10 [2022-12-14 15:39:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:39:35,064 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 981 transitions. [2022-12-14 15:39:35,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 15:39:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 981 transitions. [2022-12-14 15:39:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:39:35,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:39:35,065 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-12-14 15:39:35,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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)] Forceful destruction successful, exit code 0 [2022-12-14 15:39:35,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:39:35,266 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:39:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:39:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1316068630, now seen corresponding path program 1 times [2022-12-14 15:39:35,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:39:35,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362332555] [2022-12-14 15:39:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:39:35,268 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 15:39:35,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:39:35,271 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:39:35,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:39:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:39:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:39:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:39:35,410 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 15:39:35,853 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 15:39:35,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:39:37,984 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 15:39:37,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:39:37,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362332555] [2022-12-14 15:39:37,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362332555] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:39:37,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1278072524] [2022-12-14 15:39:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:39:37,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:39:37,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:39:37,986 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:39:37,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 15:39:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:39:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:39:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:39:38,215 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 15:39:38,792 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 15:39:38,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:39:41,109 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 15:39:41,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1278072524] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:39:41,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421378953] [2022-12-14 15:39:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:39:41,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:39:41,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:39:41,110 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:39:41,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 15:39:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:39:41,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:39:41,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:39:41,231 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 15:39:41,630 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 15:39:41,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:39:42,180 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 15:39:42,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421378953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:39:42,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:39:42,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 36 [2022-12-14 15:39:42,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533925618] [2022-12-14 15:39:42,180 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:39:42,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 15:39:42,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:39:42,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 15:39:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 15:39:42,182 INFO L87 Difference]: Start difference. First operand 364 states and 981 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 15:39:46,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:39:48,408 WARN L539 Checker$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 15:39:50,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:39:52,413 WARN L539 Checker$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 15:39:54,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:39:55,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:39:57,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:39:59,529 WARN L539 Checker$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 15:40:01,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:40:03,123 WARN L539 Checker$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 15:40:05,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:40:06,450 WARN L539 Checker$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 15:40:07,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:40:10,744 WARN L539 Checker$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 15:40:12,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:40:14,766 WARN L539 Checker$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 15:40:16,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:40:20,203 WARN L539 Checker$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 15:40:26,290 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 15:40:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:38,593 INFO L93 Difference]: Finished difference Result 2789 states and 7114 transitions. [2022-12-14 15:40:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 15:40:38,595 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 15:40:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:38,602 INFO L225 Difference]: With dead ends: 2789 [2022-12-14 15:40:38,602 INFO L226 Difference]: Without dead ends: 2789 [2022-12-14 15:40:38,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=973, Invalid=1889, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 15:40:38,603 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1921 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 86 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1921 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:38,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1921 Valid, 194 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2009 Invalid, 11 Unknown, 0 Unchecked, 45.1s Time] [2022-12-14 15:40:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2022-12-14 15:40:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 387. [2022-12-14 15:40:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 376 states have (on average 2.726063829787234) internal successors, (1025), 386 states have internal predecessors, (1025), 0 states have call successors, (0), 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 15:40:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1025 transitions. [2022-12-14 15:40:38,620 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1025 transitions. Word has length 10 [2022-12-14 15:40:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:38,620 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 1025 transitions. [2022-12-14 15:40:38,620 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 15:40:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1025 transitions. [2022-12-14 15:40:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:40:38,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:38,621 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:38,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-12-14 15:40:38,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:40:39,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-14 15:40:39,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:40:39,223 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:40:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:39,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1286745838, now seen corresponding path program 1 times [2022-12-14 15:40:39,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:40:39,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889083883] [2022-12-14 15:40:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:39,225 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 15:40:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:40:39,226 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:40:39,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (31)] Waiting until timeout for monitored process [2022-12-14 15:40:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:39,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:40:39,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:40:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:39,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:40:39,715 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 35 treesize of output 31 [2022-12-14 15:40:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:40,007 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:40:40,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889083883] [2022-12-14 15:40:40,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889083883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:40:40,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1772584236] [2022-12-14 15:40:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:40,007 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:40:40,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:40:40,008 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:40:40,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 15:40:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:40:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:40:40,169 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 15:40:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:40,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:40:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:41,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1772584236] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:40:41,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318855447] [2022-12-14 15:40:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:41,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:40:41,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:40:41,425 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:40:41,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 15:40:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:40:41,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:40:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:41,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:40:41,694 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 35 treesize of output 31 [2022-12-14 15:40:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:41,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318855447] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:40:41,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:40:41,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 17 [2022-12-14 15:40:41,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945871489] [2022-12-14 15:40:41,746 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:40:41,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 15:40:41,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:40:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 15:40:41,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-12-14 15:40:41,748 INFO L87 Difference]: Start difference. First operand 387 states and 1025 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:44,636 INFO L93 Difference]: Finished difference Result 720 states and 1703 transitions. [2022-12-14 15:40:44,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 15:40:44,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 15:40:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:44,639 INFO L225 Difference]: With dead ends: 720 [2022-12-14 15:40:44,639 INFO L226 Difference]: Without dead ends: 628 [2022-12-14 15:40:44,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2022-12-14 15:40:44,640 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 279 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:44,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 44 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 15:40:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-12-14 15:40:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 382. [2022-12-14 15:40:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 371 states have (on average 2.7169811320754715) internal successors, (1008), 381 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1008 transitions. [2022-12-14 15:40:44,646 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1008 transitions. Word has length 10 [2022-12-14 15:40:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:44,646 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 1008 transitions. [2022-12-14 15:40:44,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1008 transitions. [2022-12-14 15:40:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:40:44,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:44,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:44,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-12-14 15:40:44,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (31)] Ended with exit code 0 [2022-12-14 15:40:45,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 15:40:45,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:40:45,250 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:40:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:45,251 INFO L85 PathProgramCache]: Analyzing trace with hash 301022771, now seen corresponding path program 2 times [2022-12-14 15:40:45,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:40:45,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028522853] [2022-12-14 15:40:45,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:40:45,252 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 15:40:45,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:40:45,254 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:40:45,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (34)] Waiting until timeout for monitored process [2022-12-14 15:40:45,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 15:40:45,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:40:45,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:40:45,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:40:45,444 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:40:45,444 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:40:45,535 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 15:40:45,535 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 15:40:45,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:40:45,623 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 15:40:45,642 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:40:45,642 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 15:40:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 15:40:45,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:40:45,721 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:40:45,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028522853] [2022-12-14 15:40:45,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028522853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:45,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:40:45,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:40:45,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728070223] [2022-12-14 15:40:45,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:45,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:40:45,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:40:45,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:40:45,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:40:45,722 INFO L87 Difference]: Start difference. First operand 382 states and 1008 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 15:40:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:45,932 INFO L93 Difference]: Finished difference Result 342 states and 862 transitions. [2022-12-14 15:40:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:40:45,933 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 11 [2022-12-14 15:40:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:45,934 INFO L225 Difference]: With dead ends: 342 [2022-12-14 15:40:45,934 INFO L226 Difference]: Without dead ends: 342 [2022-12-14 15:40:45,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:40:45,935 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:45,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 4 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:40:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-12-14 15:40:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 280. [2022-12-14 15:40:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 2.5948905109489053) internal successors, (711), 279 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 711 transitions. [2022-12-14 15:40:45,940 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 711 transitions. Word has length 11 [2022-12-14 15:40:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:45,940 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 711 transitions. [2022-12-14 15:40:45,940 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 15:40:45,940 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 711 transitions. [2022-12-14 15:40:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:40:45,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:45,941 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:45,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (34)] Ended with exit code 0 [2022-12-14 15:40:46,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:40:46,142 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:40:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash -714072597, now seen corresponding path program 2 times [2022-12-14 15:40:46,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:40:46,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840418092] [2022-12-14 15:40:46,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:40:46,144 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 15:40:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:40:46,147 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:40:46,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (35)] Waiting until timeout for monitored process [2022-12-14 15:40:46,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 15:40:46,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:40:46,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:40:46,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:40:46,421 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 15:40:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:40:46,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:40:46,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:40:46,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840418092] [2022-12-14 15:40:46,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840418092] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:46,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:40:46,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:40:46,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669298747] [2022-12-14 15:40:46,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:46,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:40:46,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:40:46,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:40:46,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:40:46,538 INFO L87 Difference]: Start difference. First operand 280 states and 711 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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 15:40:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:46,730 INFO L93 Difference]: Finished difference Result 260 states and 623 transitions. [2022-12-14 15:40:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:40:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 11 [2022-12-14 15:40:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:46,732 INFO L225 Difference]: With dead ends: 260 [2022-12-14 15:40:46,732 INFO L226 Difference]: Without dead ends: 246 [2022-12-14 15:40:46,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:40:46,733 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:46,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:40:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-12-14 15:40:46,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 164. [2022-12-14 15:40:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 161 states have (on average 2.130434782608696) internal successors, (343), 163 states have internal predecessors, (343), 0 states have call successors, (0), 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 15:40:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 343 transitions. [2022-12-14 15:40:46,736 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 343 transitions. Word has length 11 [2022-12-14 15:40:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:46,736 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 343 transitions. [2022-12-14 15:40:46,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 15:40:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 343 transitions. [2022-12-14 15:40:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 15:40:46,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:46,736 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 15:40:46,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (35)] Ended with exit code 0 [2022-12-14 15:40:46,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:40:46,937 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:40:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:46,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1397817983, now seen corresponding path program 3 times [2022-12-14 15:40:46,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:40:46,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494012795] [2022-12-14 15:40:46,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:40:46,940 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 15:40:46,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:40:46,941 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:40:46,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (36)] Waiting until timeout for monitored process [2022-12-14 15:40:47,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:40:47,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:40:47,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:40:47,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:40:47,301 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:40:47,301 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:40:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:47,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:40:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:51,178 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:40:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494012795] [2022-12-14 15:40:51,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494012795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:40:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [139022908] [2022-12-14 15:40:51,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:40:51,179 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:40:51,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:40:51,179 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:40:51,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 15:40:51,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:40:51,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:40:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:40:51,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:40:51,858 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:40:51,858 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:40:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:52,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:40:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:52,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [139022908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:40:52,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130854702] [2022-12-14 15:40:52,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:40:52,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:40:52,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:40:52,481 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:40:52,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 15:40:55,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:40:55,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:40:55,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:40:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:40:55,402 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 15:40:55,403 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 15:40:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:55,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:40:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:56,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130854702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:40:56,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:40:56,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-12-14 15:40:56,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801679530] [2022-12-14 15:40:56,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:40:56,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 15:40:56,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:40:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 15:40:56,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:40:56,032 INFO L87 Difference]: Start difference. First operand 164 states and 343 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 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 15:41:08,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:41:09,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:41:11,951 WARN L539 Checker$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 15:41:13,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:41:15,957 WARN L539 Checker$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 15:41:17,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:41:19,963 WARN L539 Checker$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 15:41:21,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:41:23,969 WARN L539 Checker$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 15:41:26,001 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 15:41:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:34,111 INFO L93 Difference]: Finished difference Result 1042 states and 2358 transitions. [2022-12-14 15:41:34,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 15:41:34,113 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 15:41:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:34,116 INFO L225 Difference]: With dead ends: 1042 [2022-12-14 15:41:34,116 INFO L226 Difference]: Without dead ends: 1042 [2022-12-14 15:41:34,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 15:41:34,116 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1185 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1982 mSolverCounterSat, 265 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1982 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:34,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 240 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1982 Invalid, 9 Unknown, 0 Unchecked, 25.5s Time] [2022-12-14 15:41:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-12-14 15:41:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 174. [2022-12-14 15:41:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 171 states have (on average 2.1169590643274856) internal successors, (362), 173 states have internal predecessors, (362), 0 states have call successors, (0), 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 15:41:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 362 transitions. [2022-12-14 15:41:34,123 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 362 transitions. Word has length 12 [2022-12-14 15:41:34,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:34,123 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 362 transitions. [2022-12-14 15:41:34,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 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 15:41:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 362 transitions. [2022-12-14 15:41:34,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:34,123 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:34,123 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:34,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 15:41:34,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (36)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:34,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 15:41:34,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:41:34,726 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1732447302, now seen corresponding path program 1 times [2022-12-14 15:41:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:34,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078600348] [2022-12-14 15:41:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:41:34,729 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 15:41:34,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:34,731 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:34,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (39)] Waiting until timeout for monitored process [2022-12-14 15:41:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:41:34,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:35,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:35,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:35,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078600348] [2022-12-14 15:41:35,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078600348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:35,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [788002297] [2022-12-14 15:41:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:41:35,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:41:35,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:41:35,146 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:41:35,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 15:41:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:41:35,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:35,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:35,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [788002297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:35,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350965926] [2022-12-14 15:41:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:41:35,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:41:35,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:41:35,432 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:41:35,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 15:41:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:41:35,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:35,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:35,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350965926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:35,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:41:35,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-12-14 15:41:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603374719] [2022-12-14 15:41:35,643 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:41:35,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:41:35,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:41:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:41:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:41:35,644 INFO L87 Difference]: Start difference. First operand 174 states and 362 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:41:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:36,426 INFO L93 Difference]: Finished difference Result 320 states and 685 transitions. [2022-12-14 15:41:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:41:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:41:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:36,428 INFO L225 Difference]: With dead ends: 320 [2022-12-14 15:41:36,428 INFO L226 Difference]: Without dead ends: 320 [2022-12-14 15:41:36,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:41:36,429 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:36,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 4 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:41:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-14 15:41:36,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 194. [2022-12-14 15:41:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 191 states have (on average 2.298429319371728) internal successors, (439), 193 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:41:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 439 transitions. [2022-12-14 15:41:36,433 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 439 transitions. Word has length 19 [2022-12-14 15:41:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:36,433 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 439 transitions. [2022-12-14 15:41:36,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:41:36,433 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 439 transitions. [2022-12-14 15:41:36,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:36,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:36,433 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:36,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:36,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (39)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:36,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 15:41:37,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:41:37,036 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash -41214580, now seen corresponding path program 2 times [2022-12-14 15:41:37,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:37,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768934821] [2022-12-14 15:41:37,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:41:37,039 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 15:41:37,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:37,041 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:37,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (42)] Waiting until timeout for monitored process [2022-12-14 15:41:37,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:41:37,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:41:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:37,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:41:37,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:37,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768934821] [2022-12-14 15:41:37,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768934821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:41:37,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:41:37,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:41:37,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855602273] [2022-12-14 15:41:37,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:41:37,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:41:37,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:41:37,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:41:37,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:41:37,284 INFO L87 Difference]: Start difference. First operand 194 states and 439 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15:41:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:37,601 INFO L93 Difference]: Finished difference Result 236 states and 520 transitions. [2022-12-14 15:41:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:41:37,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:41:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:37,604 INFO L225 Difference]: With dead ends: 236 [2022-12-14 15:41:37,604 INFO L226 Difference]: Without dead ends: 230 [2022-12-14 15:41:37,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:41:37,604 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:37,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:41:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-12-14 15:41:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 194. [2022-12-14 15:41:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 191 states have (on average 2.256544502617801) internal successors, (431), 193 states have internal predecessors, (431), 0 states have call successors, (0), 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 15:41:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 431 transitions. [2022-12-14 15:41:37,607 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 431 transitions. Word has length 19 [2022-12-14 15:41:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:37,608 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 431 transitions. [2022-12-14 15:41:37,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15:41:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 431 transitions. [2022-12-14 15:41:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:37,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:37,608 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:37,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (42)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:37,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:37,809 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:37,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:37,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1523278118, now seen corresponding path program 3 times [2022-12-14 15:41:37,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:37,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768435471] [2022-12-14 15:41:37,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:41:37,812 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 15:41:37,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:37,815 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:37,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (43)] Waiting until timeout for monitored process [2022-12-14 15:41:38,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:41:38,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:38,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:41:38,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:38,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:41:38,234 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:38,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768435471] [2022-12-14 15:41:38,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768435471] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:41:38,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:41:38,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:41:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208621757] [2022-12-14 15:41:38,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:41:38,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:41:38,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:41:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:41:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:41:38,235 INFO L87 Difference]: Start difference. First operand 194 states and 431 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15:41:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:38,602 INFO L93 Difference]: Finished difference Result 230 states and 504 transitions. [2022-12-14 15:41:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:41:38,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:41:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:38,604 INFO L225 Difference]: With dead ends: 230 [2022-12-14 15:41:38,604 INFO L226 Difference]: Without dead ends: 220 [2022-12-14 15:41:38,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 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 15:41:38,605 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:38,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:41:38,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-12-14 15:41:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 194. [2022-12-14 15:41:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 191 states have (on average 2.2146596858638743) internal successors, (423), 193 states have internal predecessors, (423), 0 states have call successors, (0), 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 15:41:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 423 transitions. [2022-12-14 15:41:38,608 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 423 transitions. Word has length 19 [2022-12-14 15:41:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:38,608 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 423 transitions. [2022-12-14 15:41:38,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15:41:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 423 transitions. [2022-12-14 15:41:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:38,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:38,609 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:38,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (43)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:38,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:38,810 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:38,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2117131470, now seen corresponding path program 4 times [2022-12-14 15:41:38,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:38,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442400364] [2022-12-14 15:41:38,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:41:38,810 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 15:41:38,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:38,811 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:38,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (44)] Waiting until timeout for monitored process [2022-12-14 15:41:38,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:41:38,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:38,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:38,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:39,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:39,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:39,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442400364] [2022-12-14 15:41:39,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442400364] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:39,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850618297] [2022-12-14 15:41:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:41:39,208 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:41:39,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:41:39,209 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:41:39,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 15:41:39,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:41:39,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:39,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:39,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:39,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [850618297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:39,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082632543] [2022-12-14 15:41:39,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:41:39,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:41:39,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:41:39,509 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:41:39,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 15:41:39,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:41:39,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:39,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:39,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082632543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:39,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:41:39,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-12-14 15:41:39,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393038581] [2022-12-14 15:41:39,703 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:41:39,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:41:39,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:41:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:41:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:41:39,704 INFO L87 Difference]: Start difference. First operand 194 states and 423 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 15:41:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:40,871 INFO L93 Difference]: Finished difference Result 324 states and 702 transitions. [2022-12-14 15:41:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:41:40,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 19 [2022-12-14 15:41:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:40,874 INFO L225 Difference]: With dead ends: 324 [2022-12-14 15:41:40,875 INFO L226 Difference]: Without dead ends: 324 [2022-12-14 15:41:40,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:41:40,875 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:40,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 7 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 15:41:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-12-14 15:41:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 200. [2022-12-14 15:41:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 197 states have (on average 2.253807106598985) internal successors, (444), 199 states have internal predecessors, (444), 0 states have call successors, (0), 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 15:41:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 444 transitions. [2022-12-14 15:41:40,880 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 444 transitions. Word has length 19 [2022-12-14 15:41:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:40,880 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 444 transitions. [2022-12-14 15:41:40,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 15:41:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 444 transitions. [2022-12-14 15:41:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:40,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:40,881 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:40,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-12-14 15:41:41,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 15:41:41,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (44)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:41,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:41,483 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash -486603104, now seen corresponding path program 5 times [2022-12-14 15:41:41,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:41,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91776388] [2022-12-14 15:41:41,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 15:41:41,485 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 15:41:41,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:41,486 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:41,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (47)] Waiting until timeout for monitored process [2022-12-14 15:41:41,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:41:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:41,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:41:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:41,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:41:41,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:41,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91776388] [2022-12-14 15:41:41,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91776388] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:41:41,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:41:41,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:41:41,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361899001] [2022-12-14 15:41:41,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:41:41,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:41:41,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:41:41,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:41:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:41:41,758 INFO L87 Difference]: Start difference. First operand 200 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15:41:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:42,089 INFO L93 Difference]: Finished difference Result 230 states and 500 transitions. [2022-12-14 15:41:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:41:42,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:41:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:42,091 INFO L225 Difference]: With dead ends: 230 [2022-12-14 15:41:42,091 INFO L226 Difference]: Without dead ends: 222 [2022-12-14 15:41:42,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:41:42,092 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:42,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 7 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:41:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-12-14 15:41:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 194. [2022-12-14 15:41:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 191 states have (on average 2.183246073298429) internal successors, (417), 193 states have internal predecessors, (417), 0 states have call successors, (0), 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 15:41:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 417 transitions. [2022-12-14 15:41:42,095 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 417 transitions. Word has length 19 [2022-12-14 15:41:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:42,095 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 417 transitions. [2022-12-14 15:41:42,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15:41:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 417 transitions. [2022-12-14 15:41:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:42,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:42,096 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:42,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (47)] Ended with exit code 0 [2022-12-14 15:41:42,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:42,297 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:42,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1208746080, now seen corresponding path program 6 times [2022-12-14 15:41:42,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:42,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624317308] [2022-12-14 15:41:42,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 15:41:42,300 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 15:41:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:42,303 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:42,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (48)] Waiting until timeout for monitored process [2022-12-14 15:41:42,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 15:41:42,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:42,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:42,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:42,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624317308] [2022-12-14 15:41:42,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624317308] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2036436296] [2022-12-14 15:41:42,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 15:41:42,704 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:41:42,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:41:42,705 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:41:42,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 15:41:42,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 15:41:42,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:41:42,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:43,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:43,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2036436296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874803607] [2022-12-14 15:41:43,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 15:41:43,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:41:43,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:41:43,051 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:41:43,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 15:41:43,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 15:41:43,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:43,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:43,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:43,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:43,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874803607] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:43,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:41:43,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 6, 6] total 11 [2022-12-14 15:41:43,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756104518] [2022-12-14 15:41:43,279 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:41:43,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 15:41:43,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:41:43,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 15:41:43,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:41:43,280 INFO L87 Difference]: Start difference. First operand 194 states and 417 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:41:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:44,069 INFO L93 Difference]: Finished difference Result 266 states and 589 transitions. [2022-12-14 15:41:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:41:44,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:41:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:44,071 INFO L225 Difference]: With dead ends: 266 [2022-12-14 15:41:44,071 INFO L226 Difference]: Without dead ends: 266 [2022-12-14 15:41:44,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:41:44,071 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:44,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 16 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:41:44,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-12-14 15:41:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 192. [2022-12-14 15:41:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 189 states have (on average 2.1904761904761907) internal successors, (414), 191 states have internal predecessors, (414), 0 states have call successors, (0), 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 15:41:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 414 transitions. [2022-12-14 15:41:44,075 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 414 transitions. Word has length 19 [2022-12-14 15:41:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:44,075 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 414 transitions. [2022-12-14 15:41:44,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:41:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 414 transitions. [2022-12-14 15:41:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:44,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:44,076 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:44,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (48)] Ended with exit code 0 [2022-12-14 15:41:44,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 15:41:44,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:44,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:41:44,678 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:44,679 INFO L85 PathProgramCache]: Analyzing trace with hash 869382828, now seen corresponding path program 1 times [2022-12-14 15:41:44,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:44,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852113521] [2022-12-14 15:41:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:41:44,681 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 15:41:44,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:44,682 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:44,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (51)] Waiting until timeout for monitored process [2022-12-14 15:41:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:41:44,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:41:44,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:44,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:41:44,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852113521] [2022-12-14 15:41:44,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852113521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:41:44,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:41:44,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:41:44,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211467557] [2022-12-14 15:41:44,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:41:44,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:41:44,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:41:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:41:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:41:44,952 INFO L87 Difference]: Start difference. First operand 192 states and 414 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15:41:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:45,277 INFO L93 Difference]: Finished difference Result 216 states and 469 transitions. [2022-12-14 15:41:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:41:45,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:41:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:45,279 INFO L225 Difference]: With dead ends: 216 [2022-12-14 15:41:45,280 INFO L226 Difference]: Without dead ends: 206 [2022-12-14 15:41:45,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 15:41:45,280 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:45,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:41:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-12-14 15:41:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 178. [2022-12-14 15:41:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 175 states have (on average 2.1942857142857144) internal successors, (384), 177 states have internal predecessors, (384), 0 states have call successors, (0), 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 15:41:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 384 transitions. [2022-12-14 15:41:45,285 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 384 transitions. Word has length 19 [2022-12-14 15:41:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:45,285 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 384 transitions. [2022-12-14 15:41:45,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15:41:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 384 transitions. [2022-12-14 15:41:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:45,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:45,285 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:45,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (51)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:45,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:45,487 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:45,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1534865278, now seen corresponding path program 2 times [2022-12-14 15:41:45,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:45,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829642596] [2022-12-14 15:41:45,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:41:45,489 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 15:41:45,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:45,492 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:45,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (52)] Waiting until timeout for monitored process [2022-12-14 15:41:45,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:41:45,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:45,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:45,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:45,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:45,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829642596] [2022-12-14 15:41:45,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829642596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55727807] [2022-12-14 15:41:45,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:41:45,903 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:41:45,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:41:45,904 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:41:45,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-14 15:41:46,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:41:46,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:46,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:46,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:46,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55727807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966819256] [2022-12-14 15:41:46,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:41:46,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:41:46,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:41:46,284 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:41:46,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 15:41:46,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:41:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:41:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:46,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:46,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966819256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:46,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:41:46,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 11 [2022-12-14 15:41:46,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908335046] [2022-12-14 15:41:46,533 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:41:46,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 15:41:46,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:41:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 15:41:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:41:46,534 INFO L87 Difference]: Start difference. First operand 178 states and 384 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:41:47,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:47,615 INFO L93 Difference]: Finished difference Result 284 states and 616 transitions. [2022-12-14 15:41:47,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:41:47,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:41:47,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:47,617 INFO L225 Difference]: With dead ends: 284 [2022-12-14 15:41:47,617 INFO L226 Difference]: Without dead ends: 272 [2022-12-14 15:41:47,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:41:47,617 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:47,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 7 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:41:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-14 15:41:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 186. [2022-12-14 15:41:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 183 states have (on average 2.2568306010928962) internal successors, (413), 185 states have internal predecessors, (413), 0 states have call successors, (0), 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 15:41:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2022-12-14 15:41:47,621 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 19 [2022-12-14 15:41:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:47,621 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2022-12-14 15:41:47,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:41:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2022-12-14 15:41:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:47,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:47,622 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:47,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:47,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:48,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (52)] Ended with exit code 0 [2022-12-14 15:41:48,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:48,224 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1980253802, now seen corresponding path program 3 times [2022-12-14 15:41:48,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:48,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910694755] [2022-12-14 15:41:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:41:48,227 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 15:41:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:48,228 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:48,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (55)] Waiting until timeout for monitored process [2022-12-14 15:41:48,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:41:48,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:48,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:48,648 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:48,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910694755] [2022-12-14 15:41:48,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910694755] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:48,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [263605881] [2022-12-14 15:41:48,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:41:48,649 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:41:48,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:41:48,650 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:41:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-12-14 15:41:48,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:41:48,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:48,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:41:48,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:48,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:49,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [263605881] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:49,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740979328] [2022-12-14 15:41:49,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:41:49,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:41:49,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:41:49,012 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:41:49,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 15:41:49,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:41:49,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:49,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:41:49,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:49,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:41:49,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740979328] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:49,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:41:49,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 11 [2022-12-14 15:41:49,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391144199] [2022-12-14 15:41:49,239 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:41:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 15:41:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:41:49,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 15:41:49,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:41:49,240 INFO L87 Difference]: Start difference. First operand 186 states and 413 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:41:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:50,276 INFO L93 Difference]: Finished difference Result 270 states and 581 transitions. [2022-12-14 15:41:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:41:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:41:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:50,279 INFO L225 Difference]: With dead ends: 270 [2022-12-14 15:41:50,279 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 15:41:50,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-12-14 15:41:50,279 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:50,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 7 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:41:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 15:41:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 169. [2022-12-14 15:41:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 166 states have (on average 2.1987951807228914) internal successors, (365), 168 states have internal predecessors, (365), 0 states have call successors, (0), 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 15:41:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 365 transitions. [2022-12-14 15:41:50,282 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 365 transitions. Word has length 19 [2022-12-14 15:41:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:50,283 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 365 transitions. [2022-12-14 15:41:50,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:41:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 365 transitions. [2022-12-14 15:41:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:41:50,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:50,283 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1] [2022-12-14 15:41:50,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 15:41:50,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-12-14 15:41:50,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (55)] Forceful destruction successful, exit code 0 [2022-12-14 15:41:50,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:50,886 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:41:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:50,887 INFO L85 PathProgramCache]: Analyzing trace with hash -336314685, now seen corresponding path program 2 times [2022-12-14 15:41:50,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:41:50,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049106291] [2022-12-14 15:41:50,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:41:50,888 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 15:41:50,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:41:50,890 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:41:50,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (58)] Waiting until timeout for monitored process [2022-12-14 15:41:51,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:41:51,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:51,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:41:51,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:51,117 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 15:41:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:41:52,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:41:57,881 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:41:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049106291] [2022-12-14 15:41:57,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049106291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [798395882] [2022-12-14 15:41:57,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:41:57,882 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:41:57,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:41:57,882 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:41:57,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-12-14 15:41:58,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:41:58,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:41:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 15:41:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:58,267 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 15:41:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:41:58,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:42:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:42:08,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [798395882] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:42:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322664849] [2022-12-14 15:42:08,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:42:08,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:42:08,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:42:08,295 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:42:08,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 15:42:08,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:42:08,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:42:08,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 15:42:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:42:08,500 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 15:42:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:42:08,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:42:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:42:09,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322664849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:42:09,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:42:09,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 52 [2022-12-14 15:42:09,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041013684] [2022-12-14 15:42:09,504 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:42:09,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 15:42:09,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:42:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 15:42:09,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=2042, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 15:42:09,505 INFO L87 Difference]: Start difference. First operand 169 states and 365 transitions. Second operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:42:21,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:23,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:25,711 WARN L539 Checker$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 15:42:27,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:29,717 WARN L539 Checker$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 15:42:31,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:33,722 WARN L539 Checker$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 15:42:35,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:37,728 WARN L539 Checker$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 15:42:39,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:41,733 WARN L539 Checker$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 15:42:43,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:45,739 WARN L539 Checker$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 15:42:47,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:49,744 WARN L539 Checker$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 15:42:51,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:53,780 WARN L539 Checker$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 15:42:55,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:42:57,786 WARN L539 Checker$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 15:42:59,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:01,792 WARN L539 Checker$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 15:43:03,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:05,798 WARN L539 Checker$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 15:43:07,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:09,653 WARN L539 Checker$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 15:43:11,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:13,659 WARN L539 Checker$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 15:43:15,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:17,638 WARN L539 Checker$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 15:43:19,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:22,448 WARN L539 Checker$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 15:43:24,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:31,171 WARN L539 Checker$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 15:43:32,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:39,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:45,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:49,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:55,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:43:59,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:44:04,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 15:44:09,031 WARN L539 Checker$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 15:44:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:44:25,604 INFO L93 Difference]: Finished difference Result 3144 states and 7809 transitions. [2022-12-14 15:44:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 15:44:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:44:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:44:25,613 INFO L225 Difference]: With dead ends: 3144 [2022-12-14 15:44:25,613 INFO L226 Difference]: Without dead ends: 3144 [2022-12-14 15:44:25,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=1492, Invalid=3478, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 15:44:25,614 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5420 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 5207 mSolverCounterSat, 217 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5420 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 5453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 5207 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:44:25,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5420 Valid, 598 Invalid, 5453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 5207 Invalid, 29 Unknown, 0 Unchecked, 99.7s Time] [2022-12-14 15:44:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2022-12-14 15:44:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 223. [2022-12-14 15:44:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 220 states have (on average 2.0681818181818183) internal successors, (455), 222 states have internal predecessors, (455), 0 states have call successors, (0), 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 15:44:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 455 transitions. [2022-12-14 15:44:25,629 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 455 transitions. Word has length 19 [2022-12-14 15:44:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:44:25,629 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 455 transitions. [2022-12-14 15:44:25,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:44:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 455 transitions. [2022-12-14 15:44:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 15:44:25,629 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:44:25,629 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:44:25,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (58)] Ended with exit code 0 [2022-12-14 15:44:25,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-12-14 15:44:26,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-14 15:44:26,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:44:26,232 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 15:44:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:44:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash -674798954, now seen corresponding path program 1 times [2022-12-14 15:44:26,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:44:26,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337014051] [2022-12-14 15:44:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:44:26,235 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 15:44:26,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:44:26,236 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 15:44:26,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/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 (61)] Waiting until timeout for monitored process [2022-12-14 15:44:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:44:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:44:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:44:27,692 INFO L321 Elim1Store]: treesize reduction 48, result has 81.9 percent of original size [2022-12-14 15:44:27,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 313 treesize of output 290 [2022-12-14 15:44:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:44:27,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:44:31,071 INFO L321 Elim1Store]: treesize reduction 48, result has 84.1 percent of original size [2022-12-14 15:44:31,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 418 treesize of output 331 [2022-12-14 15:44:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:44:33,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:44:33,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337014051] [2022-12-14 15:44:33,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337014051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:44:33,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1877120099] [2022-12-14 15:44:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:44:33,575 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:44:33,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:44:33,576 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:44:33,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a53c89-63ac-4fe4-86d9-b72324c405cc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-12-14 15:44:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:44:34,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 15:44:34,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:44:34,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-12-14 15:44:34,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 15:44:34,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 15:44:35,374 INFO L321 Elim1Store]: treesize reduction 264, result has 0.4 percent of original size [2022-12-14 15:44:35,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 667 treesize of output 105 [2022-12-14 15:44:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:44:35,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:44:37,811 WARN L837 $PredicateComparison]: unable to prove that (forall ((~f~0.offset (_ BitVec 32)) (~f~0.base (_ BitVec 32)) (v_ArrVal_2167 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2167))) (let ((.cse1 (let ((.cse5 (select .cse4 ~f~0.base)) (.cse6 (bvmul (_ bv4 32) c_~counter~0))) (concat (concat (concat (select .cse5 (bvadd (_ bv3 32) ~f~0.offset .cse6)) (select .cse5 (bvadd (_ bv2 32) ~f~0.offset .cse6))) (select .cse5 (bvadd ~f~0.offset .cse6 (_ bv1 32)))) (select .cse5 (bvadd ~f~0.offset .cse6)))))) (let ((.cse0 (let ((.cse2 (select .cse4 c_~f_inv~0.base)) (.cse3 (bvmul (_ bv4 32) .cse1))) (concat (concat (concat (select .cse2 (bvadd (_ bv3 32) c_~f_inv~0.offset .cse3)) (select .cse2 (bvadd (_ bv2 32) c_~f_inv~0.offset .cse3))) (select .cse2 (bvadd c_~f_inv~0.offset .cse3 (_ bv1 32)))) (select .cse2 (bvadd c_~f_inv~0.offset .cse3)))))) (or (not (= c_~counter~0 .cse0)) (not (bvsge .cse0 (_ bv0 32))) (not (bvslt .cse0 c_~n~0)) (not (bvslt .cse1 c_~n_inv~0)) (= .cse0 (_ bv0 32)) (not (bvsge .cse1 (_ bv0 32)))))))) is different from false [2022-12-14 15:44:38,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:44:38,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 4622 treesize of output 1505 [2022-12-14 15:44:55,079 WARN L233 SmtUtils]: Spent 16.83s on a formula simplification. DAG size of input: 449 DAG size of output: 281 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 15:44:55,084 INFO L321 Elim1Store]: treesize reduction 2106, result has 55.4 percent of original size [2022-12-14 15:44:55,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 20 new quantified variables, introduced 120 case distinctions, treesize of input 24492 treesize of output 18139 [2022-12-14 15:44:55,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:44:55,611 INFO L217 Elim1Store]: Index analysis took 268 ms [2022-12-14 15:45:04,910 WARN L233 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 397 DAG size of output: 277 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 15:45:04,913 INFO L321 Elim1Store]: treesize reduction 822, result has 69.0 percent of original size [2022-12-14 15:45:04,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 30 disjoint index pairs (out of 120 index pairs), introduced 20 new quantified variables, introduced 90 case distinctions, treesize of input 16822 treesize of output 7775 [2022-12-14 15:45:05,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:45:05,845 INFO L217 Elim1Store]: Index analysis took 336 ms [2022-12-14 15:45:13,667 WARN L233 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 396 DAG size of output: 276 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 15:45:13,669 INFO L321 Elim1Store]: treesize reduction 498, result has 70.3 percent of original size [2022-12-14 15:45:13,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 30 disjoint index pairs (out of 120 index pairs), introduced 20 new quantified variables, introduced 90 case distinctions, treesize of input 7634 treesize of output 5025