./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- 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 13:13:19,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:13:19,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:13:19,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:13:19,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:13:19,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:13:19,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:13:19,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:13:19,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:13:19,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:13:19,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:13:19,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:13:19,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:13:19,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:13:19,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:13:19,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:13:19,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:13:19,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:13:19,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:13:19,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:13:19,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:13:19,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:13:19,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:13:19,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:13:19,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:13:19,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:13:19,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:13:19,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:13:19,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:13:19,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:13:19,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:13:19,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:13:19,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:13:19,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:13:19,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:13:19,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:13:19,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:13:19,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:13:19,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:13:19,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:13:19,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:13:19,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:13:19,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:13:19,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:13:19,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:13:19,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:13:19,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:13:19,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:13:19,650 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:13:19,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:13:19,650 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:13:19,650 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:13:19,650 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:13:19,650 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:13:19,650 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:13:19,650 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:13:19,651 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:13:19,651 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:13:19,651 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:13:19,651 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:13:19,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:13:19,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:13:19,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:13:19,652 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:13:19,652 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:13:19,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:13:19,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:13:19,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:13:19,653 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:13:19,653 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:13:19,653 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:13:19,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:13:19,653 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:13:19,653 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:13:19,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:13:19,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:13:19,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:13:19,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:13:19,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:13:19,654 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:13:19,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:13:19,654 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:13:19,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:13:19,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:13:19,654 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_c2ab263b-c4ef-436d-a8c3-4f352930168c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-12-14 13:13:19,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:13:19,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:13:19,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:13:19,842 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:13:19,843 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:13:19,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-12-14 13:13:22,454 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:13:22,619 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:13:22,620 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-12-14 13:13:22,624 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/data/1e5d1e3a8/13a020c9cbcb43b0b2b787db938f0ae2/FLAG217ae2062 [2022-12-14 13:13:22,636 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/data/1e5d1e3a8/13a020c9cbcb43b0b2b787db938f0ae2 [2022-12-14 13:13:22,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:13:22,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:13:22,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:13:22,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:13:22,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:13:22,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:22" (1/1) ... [2022-12-14 13:13:22,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@551a3db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:22, skipping insertion in model container [2022-12-14 13:13:22,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:22" (1/1) ... [2022-12-14 13:13:22,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:13:22,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:13:22,778 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:13:22,780 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:13:22,783 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:13:22,784 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:13:22,788 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_c2ab263b-c4ef-436d-a8c3-4f352930168c/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-12-14 13:13:22,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:13:22,802 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 13:13:22,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c76c505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:22, skipping insertion in model container [2022-12-14 13:13:22,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:13:22,803 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 13:13:22,804 INFO L158 Benchmark]: Toolchain (without parser) took 164.42ms. Allocated memory is still 146.8MB. Free memory was 111.2MB in the beginning and 100.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 13:13:22,804 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 146.8MB. Free memory is still 89.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:13:22,805 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.36ms. Allocated memory is still 146.8MB. Free memory was 110.6MB in the beginning and 101.4MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 13:13:22,806 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 146.8MB. Free memory is still 89.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.36ms. Allocated memory is still 146.8MB. Free memory was 110.6MB in the beginning and 101.4MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- 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 13:13:24,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:13:24,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:13:24,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:13:24,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:13:24,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:13:24,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:13:24,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:13:24,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:13:24,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:13:24,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:13:24,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:13:24,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:13:24,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:13:24,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:13:24,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:13:24,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:13:24,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:13:24,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:13:24,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:13:24,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:13:24,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:13:24,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:13:24,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:13:24,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:13:24,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:13:24,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:13:24,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:13:24,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:13:24,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:13:24,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:13:24,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:13:24,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:13:24,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:13:24,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:13:24,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:13:24,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:13:24,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:13:24,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:13:24,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:13:24,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:13:24,280 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 13:13:24,301 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:13:24,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:13:24,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:13:24,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:13:24,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:13:24,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:13:24,303 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:13:24,303 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:13:24,303 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:13:24,304 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:13:24,304 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:13:24,304 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:13:24,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:13:24,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:13:24,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:13:24,305 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:13:24,305 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:13:24,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:13:24,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:13:24,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:13:24,306 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:13:24,306 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:13:24,306 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:13:24,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:13:24,306 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:13:24,307 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 13:13:24,307 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 13:13:24,307 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:13:24,307 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:13:24,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:13:24,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 13:13:24,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:13:24,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:13:24,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:13:24,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:13:24,308 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 13:13:24,308 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 13:13:24,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:13:24,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 13:13:24,309 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_c2ab263b-c4ef-436d-a8c3-4f352930168c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-12-14 13:13:24,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:13:24,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:13:24,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:13:24,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:13:24,568 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:13:24,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-12-14 13:13:27,128 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:13:27,280 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:13:27,280 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-12-14 13:13:27,287 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/data/cdd6c2a5e/aecb25db70434bfb8225a1b65a7bf3f2/FLAG0efbe110b [2022-12-14 13:13:27,298 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/data/cdd6c2a5e/aecb25db70434bfb8225a1b65a7bf3f2 [2022-12-14 13:13:27,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:13:27,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:13:27,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:13:27,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:13:27,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:13:27,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5655ecc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27, skipping insertion in model container [2022-12-14 13:13:27,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:13:27,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:13:27,435 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:13:27,438 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:13:27,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:13:27,442 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:13:27,446 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_c2ab263b-c4ef-436d-a8c3-4f352930168c/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-12-14 13:13:27,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:13:27,463 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 13:13:27,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:13:27,469 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:13:27,470 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:13:27,470 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:13:27,471 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:13:27,474 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_c2ab263b-c4ef-436d-a8c3-4f352930168c/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-12-14 13:13:27,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:13:27,480 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:13:27,489 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:13:27,490 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:13:27,491 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:13:27,492 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:13:27,494 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_c2ab263b-c4ef-436d-a8c3-4f352930168c/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-12-14 13:13:27,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:13:27,509 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:13:27,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27 WrapperNode [2022-12-14 13:13:27,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:13:27,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:13:27,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:13:27,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:13:27,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,539 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 129 [2022-12-14 13:13:27,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:13:27,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:13:27,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:13:27,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:13:27,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,559 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:13:27,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:13:27,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:13:27,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:13:27,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (1/1) ... [2022-12-14 13:13:27,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:13:27,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:27,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:13:27,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:13:27,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:13:27,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 13:13:27,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:13:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 13:13:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 13:13:27,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 13:13:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 13:13:27,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 13:13:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 13:13:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 13:13:27,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:13:27,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:13:27,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:13:27,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:13:27,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 13:13:27,634 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 13:13:27,729 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:13:27,731 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:13:28,075 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:13:28,156 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:13:28,156 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 13:13:28,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:13:28 BoogieIcfgContainer [2022-12-14 13:13:28,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:13:28,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:13:28,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:13:28,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:13:28,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:13:27" (1/3) ... [2022-12-14 13:13:28,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a700c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:13:28, skipping insertion in model container [2022-12-14 13:13:28,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:27" (2/3) ... [2022-12-14 13:13:28,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a700c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:13:28, skipping insertion in model container [2022-12-14 13:13:28,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:13:28" (3/3) ... [2022-12-14 13:13:28,165 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-12-14 13:13:28,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:13:28,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-12-14 13:13:28,179 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 13:13:28,226 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 13:13:28,253 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 13:13:28,263 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 132 transitions, 280 flow [2022-12-14 13:13:28,265 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 132 transitions, 280 flow [2022-12-14 13:13:28,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 132 transitions, 280 flow [2022-12-14 13:13:28,305 INFO L130 PetriNetUnfolder]: 9/130 cut-off events. [2022-12-14 13:13:28,305 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 13:13:28,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 130 events. 9/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 114 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2022-12-14 13:13:28,310 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-12-14 13:13:39,676 INFO L134 LiptonReduction]: Checked pairs total: 931 [2022-12-14 13:13:39,676 INFO L136 LiptonReduction]: Total number of compositions: 144 [2022-12-14 13:13:39,681 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 82 flow [2022-12-14 13:13:39,695 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 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 13:13:39,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:13:39,711 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;@23ec1b35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:13:39,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-12-14 13:13:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 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 13:13:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:13:39,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:39,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:13:39,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash 19411, now seen corresponding path program 1 times [2022-12-14 13:13:39,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:39,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979464174] [2022-12-14 13:13:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:39,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:39,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:39,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:39,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:13:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:39,877 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 13:13:39,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-14 13:13:39,920 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 13:13:39,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:39,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:39,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979464174] [2022-12-14 13:13:39,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979464174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:39,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:39,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:13:39,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329619314] [2022-12-14 13:13:39,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:39,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:39,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:39,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:39,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:39,947 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 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 13:13:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:40,074 INFO L93 Difference]: Finished difference Result 88 states and 201 transitions. [2022-12-14 13:13:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:40,077 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 13:13:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:40,083 INFO L225 Difference]: With dead ends: 88 [2022-12-14 13:13:40,084 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 13:13:40,084 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 13:13:40,087 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:40,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:13:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 13:13:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 13:13:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 3.6545454545454548) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 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 13:13:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2022-12-14 13:13:40,114 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 2 [2022-12-14 13:13:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:40,114 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2022-12-14 13:13:40,115 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 13:13:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2022-12-14 13:13:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:13:40,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:40,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:13:40,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:40,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:40,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash 19316, now seen corresponding path program 1 times [2022-12-14 13:13:40,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:40,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440857310] [2022-12-14 13:13:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:40,322 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 13:13:40,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:40,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:40,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:40,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:13:40,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:40,513 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 13:13:40,513 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 13:13:40,527 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 13:13:40,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:40,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:40,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440857310] [2022-12-14 13:13:40,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440857310] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:40,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:40,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:13:40,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339961647] [2022-12-14 13:13:40,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:40,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:40,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:40,529 INFO L87 Difference]: Start difference. First operand 88 states and 201 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 13:13:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:40,639 INFO L93 Difference]: Finished difference Result 87 states and 200 transitions. [2022-12-14 13:13:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:40,639 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 13:13:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:40,640 INFO L225 Difference]: With dead ends: 87 [2022-12-14 13:13:40,640 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 13:13:40,640 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 13:13:40,641 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:40,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:13:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 13:13:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-12-14 13:13:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 3.6363636363636362) internal successors, (200), 86 states have internal predecessors, (200), 0 states have call successors, (0), 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 13:13:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 200 transitions. [2022-12-14 13:13:40,647 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 200 transitions. Word has length 2 [2022-12-14 13:13:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:40,647 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 200 transitions. [2022-12-14 13:13:40,647 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 13:13:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 200 transitions. [2022-12-14 13:13:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:13:40,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:40,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:13:40,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:40,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:40,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:40,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:40,851 INFO L85 PathProgramCache]: Analyzing trace with hash 19412, now seen corresponding path program 1 times [2022-12-14 13:13:40,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:40,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793437519] [2022-12-14 13:13:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:40,854 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 13:13:40,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:40,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:40,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:13:41,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:41,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:41,078 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:13:41,078 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 13:13:41,092 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 13:13:41,121 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 13:13:41,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:41,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:41,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793437519] [2022-12-14 13:13:41,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793437519] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:41,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:41,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:13:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13598940] [2022-12-14 13:13:41,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:41,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:41,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:41,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:41,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:41,123 INFO L87 Difference]: Start difference. First operand 87 states and 200 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 13:13:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:41,228 INFO L93 Difference]: Finished difference Result 70 states and 151 transitions. [2022-12-14 13:13:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:41,229 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 13:13:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:41,229 INFO L225 Difference]: With dead ends: 70 [2022-12-14 13:13:41,229 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 13:13:41,230 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 13:13:41,230 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:41,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:13:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 13:13:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-12-14 13:13:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 69 states have internal predecessors, (151), 0 states have call successors, (0), 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 13:13:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 151 transitions. [2022-12-14 13:13:41,235 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 151 transitions. Word has length 2 [2022-12-14 13:13:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:41,235 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 151 transitions. [2022-12-14 13:13:41,235 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 13:13:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 151 transitions. [2022-12-14 13:13:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:13:41,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:41,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:13:41,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:41,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:41,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:41,436 INFO L85 PathProgramCache]: Analyzing trace with hash 19317, now seen corresponding path program 1 times [2022-12-14 13:13:41,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:41,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616537556] [2022-12-14 13:13:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:41,437 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 13:13:41,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:41,438 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:41,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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)] Waiting until timeout for monitored process [2022-12-14 13:13:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:41,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:13:41,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:41,531 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:13:41,531 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 13:13:41,560 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 13:13:41,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:41,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:41,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616537556] [2022-12-14 13:13:41,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616537556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:41,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:41,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:13:41,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259616526] [2022-12-14 13:13:41,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:41,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:41,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:41,563 INFO L87 Difference]: Start difference. First operand 70 states and 151 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 13:13:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:41,740 INFO L93 Difference]: Finished difference Result 138 states and 300 transitions. [2022-12-14 13:13:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:41,740 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 13:13:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:41,742 INFO L225 Difference]: With dead ends: 138 [2022-12-14 13:13:41,742 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 13:13:41,742 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 13:13:41,743 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:41,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:13:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 13:13:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 71. [2022-12-14 13:13:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 3.122448979591837) internal successors, (153), 70 states have internal predecessors, (153), 0 states have call successors, (0), 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 13:13:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 153 transitions. [2022-12-14 13:13:41,749 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 153 transitions. Word has length 2 [2022-12-14 13:13:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:41,749 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 153 transitions. [2022-12-14 13:13:41,749 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 13:13:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 153 transitions. [2022-12-14 13:13:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:13:41,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:41,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:13:41,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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)] Ended with exit code 0 [2022-12-14 13:13:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:41,952 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:41,953 INFO L85 PathProgramCache]: Analyzing trace with hash 601807, now seen corresponding path program 1 times [2022-12-14 13:13:41,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:41,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808671296] [2022-12-14 13:13:41,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:41,955 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 13:13:41,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:41,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:41,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (6)] Waiting until timeout for monitored process [2022-12-14 13:13:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:42,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:13:42,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:42,117 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:13:42,117 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 13:13:42,170 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 13:13:42,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:42,354 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 13:13:42,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808671296] [2022-12-14 13:13:42,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808671296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1257325633] [2022-12-14 13:13:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:42,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:13:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:13:42,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:13:42,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 13:13:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:42,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:13:42,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:42,504 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:13:42,505 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 13:13:42,536 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 13:13:42,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:42,601 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 13:13:42,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1257325633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:42,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530482982] [2022-12-14 13:13:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:42,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:42,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:42,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:13:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:13:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:42,714 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:13:42,715 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 13:13:42,749 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 13:13:42,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:42,875 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 13:13:42,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530482982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:42,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:13:42,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 13:13:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404508929] [2022-12-14 13:13:42,876 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:13:42,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:13:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:13:42,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:13:42,877 INFO L87 Difference]: Start difference. First operand 71 states and 153 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 13:13:43,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:43,728 INFO L93 Difference]: Finished difference Result 275 states and 600 transitions. [2022-12-14 13:13:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:13:43,729 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 13:13:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:43,731 INFO L225 Difference]: With dead ends: 275 [2022-12-14 13:13:43,731 INFO L226 Difference]: Without dead ends: 275 [2022-12-14 13:13:43,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:13:43,731 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 167 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:43,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:13:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-14 13:13:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 74. [2022-12-14 13:13:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 73 states have internal predecessors, (159), 0 states have call successors, (0), 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 13:13:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 159 transitions. [2022-12-14 13:13:43,737 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 159 transitions. Word has length 3 [2022-12-14 13:13:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:43,737 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 159 transitions. [2022-12-14 13:13:43,737 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 13:13:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 159 transitions. [2022-12-14 13:13:43,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:13:43,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:43,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:13:43,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (6)] Forceful destruction successful, exit code 0 [2022-12-14 13:13:43,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:13:44,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:13:44,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:13:44,340 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:44,341 INFO L85 PathProgramCache]: Analyzing trace with hash 18666853, now seen corresponding path program 1 times [2022-12-14 13:13:44,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:44,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198861734] [2022-12-14 13:13:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:44,343 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 13:13:44,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:44,345 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:44,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:44,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:13:44,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:44,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:44,438 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-14 13:13:44,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-14 13:13:44,446 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 42 treesize of output 38 [2022-12-14 13:13:44,466 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 13:13:44,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:44,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198861734] [2022-12-14 13:13:44,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198861734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:44,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:44,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:13:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873958667] [2022-12-14 13:13:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:44,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:44,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:44,468 INFO L87 Difference]: Start difference. First operand 74 states and 159 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:44,541 INFO L93 Difference]: Finished difference Result 66 states and 143 transitions. [2022-12-14 13:13:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:44,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:13:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:44,542 INFO L225 Difference]: With dead ends: 66 [2022-12-14 13:13:44,543 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 13:13:44,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 13:13:44,543 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:44,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:13:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 13:13:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-12-14 13:13:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 2.86) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 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 13:13:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2022-12-14 13:13:44,547 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 4 [2022-12-14 13:13:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:44,547 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2022-12-14 13:13:44,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2022-12-14 13:13:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:13:44,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:44,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:13:44,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:44,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:44,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:44,750 INFO L85 PathProgramCache]: Analyzing trace with hash 18666854, now seen corresponding path program 1 times [2022-12-14 13:13:44,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:44,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183577126] [2022-12-14 13:13:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:44,751 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 13:13:44,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:44,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:44,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 13:13:44,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:44,855 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 13:13:44,855 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 22 [2022-12-14 13:13:44,870 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 13:13:44,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:44,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:44,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183577126] [2022-12-14 13:13:44,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183577126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:44,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:44,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:13:44,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414538354] [2022-12-14 13:13:44,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:44,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:44,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:44,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:44,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:44,871 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:44,942 INFO L93 Difference]: Finished difference Result 58 states and 127 transitions. [2022-12-14 13:13:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:13:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:44,943 INFO L225 Difference]: With dead ends: 58 [2022-12-14 13:13:44,943 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 13:13:44,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 13:13:44,944 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:44,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:13:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 13:13:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 13:13:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 2.6458333333333335) internal successors, (127), 57 states have internal predecessors, (127), 0 states have call successors, (0), 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 13:13:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 127 transitions. [2022-12-14 13:13:44,949 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 127 transitions. Word has length 4 [2022-12-14 13:13:44,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:44,949 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 127 transitions. [2022-12-14 13:13:44,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 127 transitions. [2022-12-14 13:13:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:13:44,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:44,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:13:44,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:45,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:45,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash 18666813, now seen corresponding path program 1 times [2022-12-14 13:13:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:45,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556545176] [2022-12-14 13:13:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:45,155 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 13:13:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:45,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:45,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:13:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:45,371 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:13:45,371 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 13:13:45,423 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 13:13:45,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:45,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:45,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556545176] [2022-12-14 13:13:45,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556545176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:45,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:45,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:13:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557702477] [2022-12-14 13:13:45,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:45,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:13:45,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:13:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:45,425 INFO L87 Difference]: Start difference. First operand 58 states and 127 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:45,581 INFO L93 Difference]: Finished difference Result 82 states and 171 transitions. [2022-12-14 13:13:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:13:45,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:13:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:45,582 INFO L225 Difference]: With dead ends: 82 [2022-12-14 13:13:45,582 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 13:13:45,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 13:13:45,583 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:45,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:13:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 13:13:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-12-14 13:13:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 2.578125) internal successors, (165), 73 states have internal predecessors, (165), 0 states have call successors, (0), 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 13:13:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 165 transitions. [2022-12-14 13:13:45,587 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 165 transitions. Word has length 4 [2022-12-14 13:13:45,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:45,587 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 165 transitions. [2022-12-14 13:13:45,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 165 transitions. [2022-12-14 13:13:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:13:45,588 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:45,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:13:45,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:45,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:45,790 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash 18666815, now seen corresponding path program 1 times [2022-12-14 13:13:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:45,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554763544] [2022-12-14 13:13:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:45,792 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 13:13:45,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:45,795 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:45,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 13:13:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:45,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:13:45,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:45,912 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 13:13:45,913 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 13:13:45,925 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 13:13:45,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:45,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:45,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554763544] [2022-12-14 13:13:45,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554763544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:45,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:45,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:13:45,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024101164] [2022-12-14 13:13:45,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:45,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:13:45,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:13:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:45,927 INFO L87 Difference]: Start difference. First operand 74 states and 165 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:46,045 INFO L93 Difference]: Finished difference Result 52 states and 111 transitions. [2022-12-14 13:13:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:13:46,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:13:46,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:46,046 INFO L225 Difference]: With dead ends: 52 [2022-12-14 13:13:46,046 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 13:13:46,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 13:13:46,046 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:46,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:13:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 13:13:46,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-12-14 13:13:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 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 13:13:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 111 transitions. [2022-12-14 13:13:46,049 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 111 transitions. Word has length 4 [2022-12-14 13:13:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:46,049 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 111 transitions. [2022-12-14 13:13:46,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 111 transitions. [2022-12-14 13:13:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:13:46,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:46,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:13:46,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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)] Forceful destruction successful, exit code 0 [2022-12-14 13:13:46,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:46,250 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash 578671738, now seen corresponding path program 1 times [2022-12-14 13:13:46,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:46,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525905600] [2022-12-14 13:13:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:46,253 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 13:13:46,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:46,256 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:46,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 13:13:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:13:46,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:46,428 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:13:46,428 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 13:13:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:46,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:46,517 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525905600] [2022-12-14 13:13:46,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525905600] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:46,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:46,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:13:46,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905927301] [2022-12-14 13:13:46,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:46,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:13:46,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:46,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:13:46,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:46,519 INFO L87 Difference]: Start difference. First operand 52 states and 111 transitions. Second operand has 4 states, 4 states have (on average 1.25) 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 13:13:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:46,694 INFO L93 Difference]: Finished difference Result 71 states and 138 transitions. [2022-12-14 13:13:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:13:46,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) 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 13:13:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:46,694 INFO L225 Difference]: With dead ends: 71 [2022-12-14 13:13:46,694 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 13:13:46,695 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 13:13:46,695 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:46,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:13:46,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 13:13:46,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-12-14 13:13:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 2.2962962962962963) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 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 13:13:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 124 transitions. [2022-12-14 13:13:46,699 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 124 transitions. Word has length 5 [2022-12-14 13:13:46,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:46,699 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 124 transitions. [2022-12-14 13:13:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) 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 13:13:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 124 transitions. [2022-12-14 13:13:46,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:13:46,700 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:46,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:13:46,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-14 13:13:46,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:46,901 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:13:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:46,902 INFO L85 PathProgramCache]: Analyzing trace with hash 751762144, now seen corresponding path program 1 times [2022-12-14 13:13:46,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:46,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381670790] [2022-12-14 13:13:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:46,904 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 13:13:46,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:46,906 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:46,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:13:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:46,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:13:46,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:47,023 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:13:47,023 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 13:13:47,143 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 13:13:47,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:47,730 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 13:13:47,730 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:47,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381670790] [2022-12-14 13:13:47,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381670790] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:47,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2112047525] [2022-12-14 13:13:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:47,731 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:13:47,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:13:47,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:13:47,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 13:13:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:47,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:13:47,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:47,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:48,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2112047525] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:48,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218062568] [2022-12-14 13:13:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:48,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:48,358 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:48,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:13:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:48,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:13:48,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:48,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:48,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218062568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:48,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:13:48,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4, 4, 4, 4] total 19 [2022-12-14 13:13:48,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58157505] [2022-12-14 13:13:48,897 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:13:48,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 13:13:48,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 13:13:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:13:48,898 INFO L87 Difference]: Start difference. First operand 59 states and 124 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 20 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 13:13:56,941 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 13:13:58,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:01,032 WARN L539 Checker$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 13:14:03,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:05,037 WARN L539 Checker$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 13:14:07,861 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 13:14:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:08,906 INFO L93 Difference]: Finished difference Result 220 states and 432 transitions. [2022-12-14 13:14:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:14:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 20 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 6 [2022-12-14 13:14:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:08,908 INFO L225 Difference]: With dead ends: 220 [2022-12-14 13:14:08,909 INFO L226 Difference]: Without dead ends: 220 [2022-12-14 13:14:08,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 13:14:08,910 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 381 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 32 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:08,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 0 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 363 Invalid, 6 Unknown, 0 Unchecked, 18.3s Time] [2022-12-14 13:14:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-12-14 13:14:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 102. [2022-12-14 13:14:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 2.6082474226804124) internal successors, (253), 101 states have internal predecessors, (253), 0 states have call successors, (0), 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 13:14:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 253 transitions. [2022-12-14 13:14:08,913 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 253 transitions. Word has length 6 [2022-12-14 13:14:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:08,914 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 253 transitions. [2022-12-14 13:14:08,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 20 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 13:14:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 253 transitions. [2022-12-14 13:14:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:14:08,914 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:08,914 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 13:14:08,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:09,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 13:14:09,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-12-14 13:14:09,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:14:09,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:14:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:09,517 INFO L85 PathProgramCache]: Analyzing trace with hash 751522293, now seen corresponding path program 2 times [2022-12-14 13:14:09,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:09,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887927164] [2022-12-14 13:14:09,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:14:09,519 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 13:14:09,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:09,521 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:09,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 13:14:09,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:14:09,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:14:09,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:09,646 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:14:09,646 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 13:14:09,770 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 13:14:09,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:10,303 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 13:14:10,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:10,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887927164] [2022-12-14 13:14:10,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887927164] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:10,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [699473565] [2022-12-14 13:14:10,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:14:10,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:14:10,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:14:10,304 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:14:10,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 13:14:10,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:14:10,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:14:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:10,474 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:14:10,475 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 13:14:10,551 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 13:14:10,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:11,352 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 13:14:11,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [699473565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:11,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805650570] [2022-12-14 13:14:11,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:14:11,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:14:11,353 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:14:11,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:14:11,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:14:11,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:11,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:14:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:11,479 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:14:11,479 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 13:14:11,555 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 13:14:11,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:11,692 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 13:14:11,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805650570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:11,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:14:11,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 13:14:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431172420] [2022-12-14 13:14:11,693 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:14:11,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 13:14:11,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 13:14:11,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:14:11,694 INFO L87 Difference]: Start difference. First operand 102 states and 253 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 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 13:14:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:14,503 INFO L93 Difference]: Finished difference Result 659 states and 1629 transitions. [2022-12-14 13:14:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:14:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 13:14:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:14,507 INFO L225 Difference]: With dead ends: 659 [2022-12-14 13:14:14,507 INFO L226 Difference]: Without dead ends: 659 [2022-12-14 13:14:14,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:14:14,508 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 667 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:14,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 0 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 13:14:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-12-14 13:14:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 108. [2022-12-14 13:14:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 2.5728155339805827) internal successors, (265), 107 states have internal predecessors, (265), 0 states have call successors, (0), 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 13:14:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 265 transitions. [2022-12-14 13:14:14,518 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 265 transitions. Word has length 6 [2022-12-14 13:14:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:14,519 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 265 transitions. [2022-12-14 13:14:14,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 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 13:14:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 265 transitions. [2022-12-14 13:14:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:14:14,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:14,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:14:14,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 13:14:14,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 13:14:14,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 13:14:15,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:15,121 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:14:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1788143527, now seen corresponding path program 1 times [2022-12-14 13:14:15,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:15,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064749650] [2022-12-14 13:14:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:14:15,126 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 13:14:15,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:15,129 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:15,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:14:15,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:14:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:15,246 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 13:14:15,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:15,276 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 13:14:15,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:15,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064749650] [2022-12-14 13:14:15,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064749650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:15,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1600459790] [2022-12-14 13:14:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:14:15,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:14:15,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:14:15,278 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:14:15,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 13:14:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:14:15,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:14:15,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:15,406 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 13:14:15,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:15,426 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 13:14:15,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1600459790] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231226983] [2022-12-14 13:14:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:14:15,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:15,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:14:15,428 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:14:15,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:14:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:14:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:14:15,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:15,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:15,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231226983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:15,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:14:15,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 5, 4] total 13 [2022-12-14 13:14:15,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915645837] [2022-12-14 13:14:15,944 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:14:15,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 13:14:15,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 13:14:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:14:15,945 INFO L87 Difference]: Start difference. First operand 108 states and 265 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:16,618 INFO L93 Difference]: Finished difference Result 210 states and 446 transitions. [2022-12-14 13:14:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:14:16,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 13:14:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:16,621 INFO L225 Difference]: With dead ends: 210 [2022-12-14 13:14:16,621 INFO L226 Difference]: Without dead ends: 210 [2022-12-14 13:14:16,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-12-14 13:14:16,622 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 161 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:16,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 0 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:14:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-12-14 13:14:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 120. [2022-12-14 13:14:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 2.765217391304348) internal successors, (318), 119 states have internal predecessors, (318), 0 states have call successors, (0), 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 13:14:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 318 transitions. [2022-12-14 13:14:16,628 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 318 transitions. Word has length 9 [2022-12-14 13:14:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:16,628 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 318 transitions. [2022-12-14 13:14:16,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 318 transitions. [2022-12-14 13:14:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:14:16,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:16,630 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1] [2022-12-14 13:14:16,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 13:14:16,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-12-14 13:14:17,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:17,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:17,232 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:14:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash 24131517, now seen corresponding path program 2 times [2022-12-14 13:14:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:17,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973123909] [2022-12-14 13:14:17,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:14:17,234 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 13:14:17,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:17,237 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:17,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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)] Waiting until timeout for monitored process [2022-12-14 13:14:17,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 13:14:17,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:17,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:14:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:17,381 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:14:17,381 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 13:14:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 13:14:17,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:14:17,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973123909] [2022-12-14 13:14:17,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973123909] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:14:17,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:14:17,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:14:17,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549255180] [2022-12-14 13:14:17,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:14:17,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:14:17,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:17,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:14:17,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:14:17,497 INFO L87 Difference]: Start difference. First operand 120 states and 318 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 13:14:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:17,637 INFO L93 Difference]: Finished difference Result 142 states and 360 transitions. [2022-12-14 13:14:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:14:17,638 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 10 [2022-12-14 13:14:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:17,638 INFO L225 Difference]: With dead ends: 142 [2022-12-14 13:14:17,639 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 13:14:17,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 13:14:17,639 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:17,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:14:17,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 13:14:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 112. [2022-12-14 13:14:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 2.710280373831776) internal successors, (290), 111 states have internal predecessors, (290), 0 states have call successors, (0), 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 13:14:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 290 transitions. [2022-12-14 13:14:17,642 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 290 transitions. Word has length 10 [2022-12-14 13:14:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:17,642 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 290 transitions. [2022-12-14 13:14:17,642 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 13:14:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 290 transitions. [2022-12-14 13:14:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:14:17,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:17,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:14:17,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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)] Ended with exit code 0 [2022-12-14 13:14:17,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:17,844 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:14:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:17,845 INFO L85 PathProgramCache]: Analyzing trace with hash 749139274, now seen corresponding path program 2 times [2022-12-14 13:14:17,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:17,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746534584] [2022-12-14 13:14:17,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:14:17,847 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 13:14:17,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:17,849 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:17,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:17,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 13:14:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:17,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:14:17,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:17,990 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:14:17,991 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 13:14:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:14:18,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:14:18,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:18,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746534584] [2022-12-14 13:14:18,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746534584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:14:18,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:14:18,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:14:18,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106604985] [2022-12-14 13:14:18,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:14:18,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:14:18,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:18,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:14:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:14:18,088 INFO L87 Difference]: Start difference. First operand 112 states and 290 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 13:14:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:18,271 INFO L93 Difference]: Finished difference Result 94 states and 234 transitions. [2022-12-14 13:14:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:14:18,272 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 13:14:18,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:18,272 INFO L225 Difference]: With dead ends: 94 [2022-12-14 13:14:18,272 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 13:14:18,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 13:14:18,273 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:18,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:14:18,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 13:14:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2022-12-14 13:14:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 69 states have internal predecessors, (156), 0 states have call successors, (0), 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 13:14:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2022-12-14 13:14:18,277 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 11 [2022-12-14 13:14:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:18,277 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2022-12-14 13:14:18,277 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 13:14:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2022-12-14 13:14:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 13:14:18,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:18,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:14:18,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:18,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:18,479 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:14:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash -458658039, now seen corresponding path program 1 times [2022-12-14 13:14:18,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:18,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736689363] [2022-12-14 13:14:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:14:18,481 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 13:14:18,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:18,484 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:18,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 13:14:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:14:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:14:18,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:18,597 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 13:14:18,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:14:18,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:18,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736689363] [2022-12-14 13:14:18,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736689363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:14:18,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:14:18,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:14:18,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955697265] [2022-12-14 13:14:18,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:14:18,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:14:18,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:18,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:14:18,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:14:18,599 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 13:14:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:18,668 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2022-12-14 13:14:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:14:18,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 12 [2022-12-14 13:14:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:18,669 INFO L225 Difference]: With dead ends: 99 [2022-12-14 13:14:18,669 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 13:14:18,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 13:14:18,670 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:18,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:14:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 13:14:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-12-14 13:14:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 2.1866666666666665) internal successors, (164), 76 states have internal predecessors, (164), 0 states have call successors, (0), 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 13:14:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 164 transitions. [2022-12-14 13:14:18,673 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 164 transitions. Word has length 12 [2022-12-14 13:14:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:18,674 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 164 transitions. [2022-12-14 13:14:18,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 13:14:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 164 transitions. [2022-12-14 13:14:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 13:14:18,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:18,674 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 13:14:18,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 13:14:18,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:18,875 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:14:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash 676086709, now seen corresponding path program 3 times [2022-12-14 13:14:18,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:18,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182258315] [2022-12-14 13:14:18,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:14:18,878 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 13:14:18,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:18,881 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:18,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 13:14:19,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:14:19,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:19,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:14:19,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:19,092 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:14:19,092 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 13:14:19,439 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 13:14:19,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:21,830 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 13:14:21,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182258315] [2022-12-14 13:14:21,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182258315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1330135270] [2022-12-14 13:14:21,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:14:21,831 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:14:21,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:14:21,832 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:14:21,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-12-14 13:14:22,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:14:22,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:22,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:14:22,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:22,448 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:14:22,448 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 13:14:22,574 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 13:14:22,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:22,880 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 13:14:22,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1330135270] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:22,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51522159] [2022-12-14 13:14:22,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:14:22,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:14:22,881 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:14:22,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 13:14:24,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:14:24,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:25,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:14:25,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:25,060 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 13:14:25,060 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 13:14:25,217 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 13:14:25,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:25,549 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 13:14:25,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51522159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:25,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:14:25,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-12-14 13:14:25,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412763865] [2022-12-14 13:14:25,549 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:14:25,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 13:14:25,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 13:14:25,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:14:25,553 INFO L87 Difference]: Start difference. First operand 77 states and 164 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 13:14:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:41,374 INFO L93 Difference]: Finished difference Result 1074 states and 2413 transitions. [2022-12-14 13:14:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:14:41,375 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 13:14:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:41,378 INFO L225 Difference]: With dead ends: 1074 [2022-12-14 13:14:41,378 INFO L226 Difference]: Without dead ends: 1074 [2022-12-14 13:14:41,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 13:14:41,379 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1482 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:41,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1482 Valid, 0 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-12-14 13:14:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-12-14 13:14:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 89. [2022-12-14 13:14:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 2.160919540229885) internal successors, (188), 88 states have internal predecessors, (188), 0 states have call successors, (0), 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 13:14:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 188 transitions. [2022-12-14 13:14:41,387 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 188 transitions. Word has length 12 [2022-12-14 13:14:41,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:41,388 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 188 transitions. [2022-12-14 13:14:41,388 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 13:14:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 188 transitions. [2022-12-14 13:14:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:14:41,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:41,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:14:41,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-12-14 13:14:41,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 13:14:41,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-14 13:14:41,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:41,990 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:14:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:41,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1168747433, now seen corresponding path program 1 times [2022-12-14 13:14:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:41,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117675222] [2022-12-14 13:14:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:14:41,993 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 13:14:41,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:41,996 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:41,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 13:14:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:14:42,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 13:14:42,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:42,145 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 13:14:42,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 47 [2022-12-14 13:14:42,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:42,266 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:14:42,310 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 13:14:42,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:42,404 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) (_ bv5 32))) is different from false [2022-12-14 13:14:42,497 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:14:42,497 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 147 treesize of output 105 [2022-12-14 13:14:42,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:42,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 36 treesize of output 9 [2022-12-14 13:14:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-14 13:14:42,652 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:42,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117675222] [2022-12-14 13:14:42,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117675222] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:42,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1487035726] [2022-12-14 13:14:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:14:42,652 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:14:42,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:14:42,653 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:14:42,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 13:14:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:14:42,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:14:42,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:43,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:43,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 47 [2022-12-14 13:14:43,161 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 51 treesize of output 19 [2022-12-14 13:14:43,191 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 13:14:43,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:43,428 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:14:43,429 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 147 treesize of output 105 [2022-12-14 13:14:43,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:43,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 36 treesize of output 9 [2022-12-14 13:14:43,556 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 13:14:43,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1487035726] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:43,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050203110] [2022-12-14 13:14:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:14:43,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:43,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:14:43,558 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:14:43,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 13:14:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:14:43,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:14:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:43,665 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 26 treesize of output 24 [2022-12-14 13:14:43,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 47 [2022-12-14 13:14:43,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:43,756 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:14:43,785 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 13:14:43,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:43,996 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:14:43,997 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 147 treesize of output 105 [2022-12-14 13:14:44,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:44,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 36 treesize of output 9 [2022-12-14 13:14:44,105 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 13:14:44,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050203110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:44,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:14:44,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 13:14:44,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267215820] [2022-12-14 13:14:44,105 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:14:44,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 13:14:44,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 13:14:44,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=190, Unknown=3, NotChecked=28, Total=272 [2022-12-14 13:14:44,106 INFO L87 Difference]: Start difference. First operand 89 states and 188 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:44,719 INFO L93 Difference]: Finished difference Result 114 states and 251 transitions. [2022-12-14 13:14:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:14:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 13:14:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:44,721 INFO L225 Difference]: With dead ends: 114 [2022-12-14 13:14:44,721 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 13:14:44,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=236, Unknown=3, NotChecked=32, Total=342 [2022-12-14 13:14:44,721 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:44,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-12-14 13:14:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 13:14:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 13:14:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 2.1951219512195124) internal successors, (180), 83 states have internal predecessors, (180), 0 states have call successors, (0), 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 13:14:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 180 transitions. [2022-12-14 13:14:44,724 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 180 transitions. Word has length 15 [2022-12-14 13:14:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:44,724 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 180 transitions. [2022-12-14 13:14:44,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 180 transitions. [2022-12-14 13:14:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:14:44,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:44,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:14:44,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-12-14 13:14:44,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 13:14:45,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 13:14:45,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:45,327 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:14:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1324383241, now seen corresponding path program 2 times [2022-12-14 13:14:45,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:45,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608129642] [2022-12-14 13:14:45,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:14:45,329 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 13:14:45,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:45,332 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:45,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 13:14:45,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:14:45,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:45,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 13:14:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:45,527 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 13:14:45,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-12-14 13:14:45,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:45,778 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:14:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:14:45,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:46,187 INFO L321 Elim1Store]: treesize reduction 120, result has 25.5 percent of original size [2022-12-14 13:14:46,187 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 149 treesize of output 106 [2022-12-14 13:14:46,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:46,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 9 [2022-12-14 13:14:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:14:46,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:46,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608129642] [2022-12-14 13:14:46,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608129642] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:46,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [519277967] [2022-12-14 13:14:46,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:14:46,429 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:14:46,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:14:46,430 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:14:46,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 13:14:46,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:14:46,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 13:14:46,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:46,828 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 28 treesize of output 37 [2022-12-14 13:14:46,898 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 13:14:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:47,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-12-14 13:14:47,330 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 51 treesize of output 19 [2022-12-14 13:14:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:47,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:47,897 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_835 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_800 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse2 (bvmul (_ bv4 32) c_~front~0)) (.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_835))) (or (not (= (let ((.cse0 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv7 32))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv6 32) .cse1 .cse2))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv5 32)))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32) .cse1 .cse2)))) (_ bv5 32))) (= (_ bv5 32) (let ((.cse4 (select (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_800) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv7 32))) (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv6 32) .cse2))) (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv5 32)))) (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32) .cse2)))))))) is different from false [2022-12-14 13:14:47,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:47,948 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 428 treesize of output 191 [2022-12-14 13:14:48,158 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:14:48,159 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 304 treesize of output 260 [2022-12-14 13:14:48,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 150 treesize of output 94 [2022-12-14 13:14:48,249 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:14:48,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 103 [2022-12-14 13:14:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 13:14:49,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [519277967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:49,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510818193] [2022-12-14 13:14:49,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:14:49,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:49,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:14:49,323 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:14:49,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 13:14:49,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:14:49,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:49,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:14:49,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:49,461 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 42 treesize of output 38 [2022-12-14 13:14:49,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-12-14 13:14:49,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:49,561 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:14:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:14:49,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:49,791 INFO L321 Elim1Store]: treesize reduction 120, result has 25.5 percent of original size [2022-12-14 13:14:49,791 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 149 treesize of output 106 [2022-12-14 13:14:49,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:49,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 9 [2022-12-14 13:14:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:14:49,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510818193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:49,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:14:49,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 8, 8, 7] total 26 [2022-12-14 13:14:49,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048078614] [2022-12-14 13:14:49,911 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:14:49,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 13:14:49,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 13:14:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=603, Unknown=3, NotChecked=50, Total=756 [2022-12-14 13:14:49,913 INFO L87 Difference]: Start difference. First operand 84 states and 180 transitions. Second operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 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 13:14:53,064 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 13:14:53,246 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_800 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_800) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) (= c_~x~0 (_ bv5 32)) (exists ((v_arrayElimCell_59 (_ BitVec 8)) (v_arrayElimCell_61 (_ BitVec 8)) (v_arrayElimCell_60 (_ BitVec 8)) (v_arrayElimCell_62 (_ BitVec 8))) (let ((.cse2 (concat (concat (concat v_arrayElimCell_62 v_arrayElimCell_59) v_arrayElimCell_60) v_arrayElimCell_61))) (and (= (_ bv5 32) .cse2) (= c_~x~0 .cse2))))) is different from false [2022-12-14 13:14:55,304 WARN L539 Checker$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 13:14:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:56,506 INFO L93 Difference]: Finished difference Result 178 states and 370 transitions. [2022-12-14 13:14:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 13:14:56,508 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 13:14:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:56,509 INFO L225 Difference]: With dead ends: 178 [2022-12-14 13:14:56,509 INFO L226 Difference]: Without dead ends: 171 [2022-12-14 13:14:56,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=201, Invalid=1135, Unknown=4, NotChecked=142, Total=1482 [2022-12-14 13:14:56,511 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 13 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:56,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 446 Invalid, 12 Unknown, 75 Unchecked, 5.5s Time] [2022-12-14 13:14:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-14 13:14:56,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 109. [2022-12-14 13:14:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 2.3551401869158877) internal successors, (252), 108 states have internal predecessors, (252), 0 states have call successors, (0), 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 13:14:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 252 transitions. [2022-12-14 13:14:56,515 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 252 transitions. Word has length 18 [2022-12-14 13:14:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:56,516 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 252 transitions. [2022-12-14 13:14:56,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 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 13:14:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 252 transitions. [2022-12-14 13:14:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:14:56,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:56,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:14:56,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-12-14 13:14:56,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 13:14:56,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-14 13:14:57,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:57,119 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:14:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1262321661, now seen corresponding path program 3 times [2022-12-14 13:14:57,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:57,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990338354] [2022-12-14 13:14:57,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:14:57,122 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 13:14:57,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:57,124 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:57,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:14:57,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:14:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:14:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:57,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:57,671 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:14:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:57,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:57,909 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2022-12-14 13:14:57,910 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2022-12-14 13:14:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:58,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:58,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990338354] [2022-12-14 13:14:58,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990338354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:58,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [668461734] [2022-12-14 13:14:58,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:14:58,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:14:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:14:58,339 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:14:58,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-12-14 13:14:58,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:14:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411459575] [2022-12-14 13:14:58,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:14:58,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:58,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:14:58,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 1 [2022-12-14 13:14:58,513 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:14:58,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 13:14:58,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:14:58,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:58,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 13:14:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:58,700 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 13:14:58,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 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 13:14:58,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:14:58,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:14:59,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:59,188 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:14:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:59,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:15:00,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:15:00,787 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 440 treesize of output 203 [2022-12-14 13:15:17,120 WARN L233 SmtUtils]: Spent 16.32s on a formula simplification. DAG size of input: 74 DAG size of output: 26 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 13:15:17,121 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:15:17,121 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 868 treesize of output 740 [2022-12-14 13:15:17,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:25,293 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 13:15:25,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:15:25,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 450 [2022-12-14 13:15:25,377 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2022-12-14 13:15:25,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 564 treesize of output 297 [2022-12-14 13:15:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:26,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411459575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:15:26,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 13:15:26,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9] total 32 [2022-12-14 13:15:26,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304172008] [2022-12-14 13:15:26,036 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 13:15:26,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 13:15:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:15:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 13:15:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=897, Unknown=10, NotChecked=0, Total=1122 [2022-12-14 13:15:26,038 INFO L87 Difference]: Start difference. First operand 109 states and 252 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:39,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:15:48,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:15:50,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:15:52,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:15:54,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:15:56,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:16:03,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:16:05,380 WARN L539 Checker$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 13:16:07,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:11,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:16:13,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:16:15,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:16:20,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:16:22,306 WARN L539 Checker$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 13:16:24,309 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 13:16:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:16:25,541 INFO L93 Difference]: Finished difference Result 444 states and 978 transitions. [2022-12-14 13:16:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 13:16:25,543 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 13:16:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:16:25,544 INFO L225 Difference]: With dead ends: 444 [2022-12-14 13:16:25,544 INFO L226 Difference]: Without dead ends: 327 [2022-12-14 13:16:25,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=882, Invalid=4331, Unknown=43, NotChecked=0, Total=5256 [2022-12-14 13:16:25,545 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 380 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 78 mSolverCounterUnsat, 98 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 98 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:16:25,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 0 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1027 Invalid, 98 Unknown, 0 Unchecked, 39.3s Time] [2022-12-14 13:16:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-12-14 13:16:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 98. [2022-12-14 13:16:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 2.15625) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 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 13:16:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2022-12-14 13:16:25,549 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 18 [2022-12-14 13:16:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:16:25,549 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2022-12-14 13:16:25,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:16:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2022-12-14 13:16:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:16:25,549 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:16:25,549 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:16:25,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:16:25,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 13:16:25,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:16:25,951 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:16:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:16:25,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1807325798, now seen corresponding path program 4 times [2022-12-14 13:16:25,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:16:25,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212915184] [2022-12-14 13:16:25,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:16:25,953 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 13:16:25,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:16:25,956 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:16:25,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (38)] Waiting until timeout for monitored process [2022-12-14 13:16:26,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:16:26,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:16:26,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:16:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:16:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:16:26,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:16:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:16:26,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:16:26,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212915184] [2022-12-14 13:16:26,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212915184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:16:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014521062] [2022-12-14 13:16:26,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:16:26,164 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:16:26,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:16:26,165 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:16:26,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-12-14 13:16:26,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:16:26,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:16:26,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:16:26,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:16:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:16:26,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:16:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:16:26,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2014521062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:16:26,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708713052] [2022-12-14 13:16:26,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:16:26,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:16:26,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:16:26,392 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:16:26,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 13:16:26,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:16:26,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:16:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:16:26,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:16:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:16:26,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:16:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:16:27,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708713052] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:16:27,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:16:27,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 7, 7] total 19 [2022-12-14 13:16:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107797671] [2022-12-14 13:16:27,379 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:16:27,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 13:16:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:16:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 13:16:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-12-14 13:16:27,381 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:16:29,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:16:29,035 INFO L93 Difference]: Finished difference Result 194 states and 387 transitions. [2022-12-14 13:16:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:16:29,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 13:16:29,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:16:29,036 INFO L225 Difference]: With dead ends: 194 [2022-12-14 13:16:29,037 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 13:16:29,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 13:16:29,038 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 167 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:16:29,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 0 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 13:16:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 13:16:29,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 119. [2022-12-14 13:16:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 2.2905982905982905) internal successors, (268), 118 states have internal predecessors, (268), 0 states have call successors, (0), 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 13:16:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2022-12-14 13:16:29,042 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 19 [2022-12-14 13:16:29,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:16:29,042 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2022-12-14 13:16:29,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:16:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2022-12-14 13:16:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:16:29,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:16:29,043 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:16:29,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-12-14 13:16:29,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (38)] Ended with exit code 0 [2022-12-14 13:16:29,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-14 13:16:29,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:16:29,645 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:16:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:16:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash -789081897, now seen corresponding path program 5 times [2022-12-14 13:16:29,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:16:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846575951] [2022-12-14 13:16:29,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:16:29,649 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 13:16:29,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:16:29,652 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:16:29,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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)] Waiting until timeout for monitored process [2022-12-14 13:16:29,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-14 13:16:29,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:16:29,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 13:16:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:16:29,915 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 42 treesize of output 38 [2022-12-14 13:16:30,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-12-14 13:16:30,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:16:30,310 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:16:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:16:30,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:16:30,750 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1089 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1089) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse1)))) (_ bv5 32))) is different from false [2022-12-14 13:16:30,849 INFO L321 Elim1Store]: treesize reduction 120, result has 25.5 percent of original size [2022-12-14 13:16:30,850 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 149 treesize of output 106 [2022-12-14 13:16:30,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:16:30,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 9 [2022-12-14 13:16:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2022-12-14 13:16:31,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:16:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846575951] [2022-12-14 13:16:31,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846575951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:16:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [848945711] [2022-12-14 13:16:31,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:16:31,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:16:31,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:16:31,152 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:16:31,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-12-14 13:16:31,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-14 13:16:31,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:16:31,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 13:16:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:16:31,870 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 28 treesize of output 37 [2022-12-14 13:16:31,960 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 13:16:32,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:16:32,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 97 treesize of output 85 [2022-12-14 13:16:32,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 28 [2022-12-14 13:16:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:16:32,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:16:34,117 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1130 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1129 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1129))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse4 (bvmul (_ bv4 32) c_~size~0)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (or (= (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1130) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv11 32) .cse1)) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 (_ bv10 32)))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 (_ bv9 32)))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32) .cse1)))) (_ bv5 32)) (not (= (concat (concat (concat (select .cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4 .cse1 (_ bv7 32))) (select .cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv6 32) .cse4 .cse1))) (select .cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4 .cse1 (_ bv5 32)))) (select .cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32) .cse4 .cse1))) (_ bv5 32))) (not (= (concat (concat (concat (select .cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv11 32) .cse4 .cse1)) (select .cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4 .cse1 (_ bv10 32)))) (select .cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4 .cse1 (_ bv9 32)))) (select .cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32) .cse4 .cse1))) (_ bv5 32))))))) is different from false [2022-12-14 13:16:34,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:16:34,169 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 642 treesize of output 261 [2022-12-14 13:16:34,512 INFO L321 Elim1Store]: treesize reduction 252, result has 24.3 percent of original size [2022-12-14 13:16:34,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 422 treesize of output 370 [2022-12-14 13:16:34,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 150 treesize of output 94 [2022-12-14 13:16:34,725 INFO L321 Elim1Store]: treesize reduction 252, result has 24.3 percent of original size [2022-12-14 13:16:34,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 201 treesize of output 173 [2022-12-14 13:16:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-12-14 13:16:42,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [848945711] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:16:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408981477] [2022-12-14 13:16:42,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:16:42,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:16:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:16:42,263 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:16:42,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 13:16:42,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-14 13:16:42,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:16:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:16:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:16:42,508 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 26 treesize of output 24 [2022-12-14 13:16:42,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-12-14 13:16:42,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:16:42,667 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:16:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:16:42,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:16:43,015 INFO L321 Elim1Store]: treesize reduction 120, result has 25.5 percent of original size [2022-12-14 13:16:43,015 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 149 treesize of output 106 [2022-12-14 13:16:43,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:16:43,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 9 [2022-12-14 13:16:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:16:43,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408981477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:16:43,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:16:43,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 12, 10, 11, 9] total 37 [2022-12-14 13:16:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642222624] [2022-12-14 13:16:43,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:16:43,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 13:16:43,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:16:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 13:16:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1179, Unknown=2, NotChecked=142, Total=1482 [2022-12-14 13:16:43,148 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand has 39 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:16:47,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:16:50,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:16:52,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:16:54,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:16:56,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:16:59,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:01,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:17:03,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:17:03,383 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse1 (bvadd c_~queue~0.offset (_ bv11 32) .cse7)) (.cse2 (bvadd c_~queue~0.offset .cse7 (_ bv10 32))) (.cse3 (bvadd c_~queue~0.offset .cse7 (_ bv9 32))) (.cse4 (bvadd c_~queue~0.offset (_ bv8 32) .cse7))) (and (forall ((v_ArrVal_1130 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1130) c_~queue~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))) (_ bv5 32))) (forall ((v_ArrVal_1089 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1089) c_~queue~0.base))) (concat (concat (concat (select .cse5 .cse1) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4))) (_ bv5 32))) (= c_~x~0 (_ bv5 32)) (exists ((v_arrayElimCell_164 (_ BitVec 8)) (v_arrayElimCell_163 (_ BitVec 8)) (v_arrayElimCell_162 (_ BitVec 8)) (v_arrayElimCell_161 (_ BitVec 8))) (let ((.cse6 (concat (concat (concat v_arrayElimCell_163 v_arrayElimCell_162) v_arrayElimCell_164) v_arrayElimCell_161))) (and (= c_~x~0 .cse6) (= .cse6 (_ bv5 32)))))))) is different from false [2022-12-14 13:17:05,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:17:08,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:10,029 WARN L539 Checker$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 13:17:10,044 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse1 (bvadd c_~queue~0.offset (_ bv11 32) .cse6)) (.cse2 (bvadd c_~queue~0.offset .cse6 (_ bv10 32))) (.cse3 (bvadd c_~queue~0.offset .cse6 (_ bv9 32))) (.cse4 (bvadd c_~queue~0.offset (_ bv8 32) .cse6))) (and (forall ((v_ArrVal_1130 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1130) c_~queue~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))) (_ bv5 32))) (forall ((v_ArrVal_1089 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1089) c_~queue~0.base))) (concat (concat (concat (select .cse5 .cse1) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4))) (_ bv5 32)))))) is different from false [2022-12-14 13:17:12,161 WARN L539 Checker$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 13:17:14,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:17:16,295 WARN L539 Checker$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 13:17:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:17,599 INFO L93 Difference]: Finished difference Result 324 states and 712 transitions. [2022-12-14 13:17:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 13:17:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 13:17:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:17,601 INFO L225 Difference]: With dead ends: 324 [2022-12-14 13:17:17,601 INFO L226 Difference]: Without dead ends: 317 [2022-12-14 13:17:17,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=378, Invalid=2826, Unknown=4, NotChecked=452, Total=3660 [2022-12-14 13:17:17,602 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 259 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 35 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 31.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:17,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 0 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1008 Invalid, 25 Unknown, 259 Unchecked, 31.4s Time] [2022-12-14 13:17:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-12-14 13:17:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 185. [2022-12-14 13:17:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 2.469945355191257) internal successors, (452), 184 states have internal predecessors, (452), 0 states have call successors, (0), 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 13:17:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 452 transitions. [2022-12-14 13:17:17,606 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 452 transitions. Word has length 21 [2022-12-14 13:17:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:17,606 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 452 transitions. [2022-12-14 13:17:17,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:17:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 452 transitions. [2022-12-14 13:17:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:17:17,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:17,607 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:17:17,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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)] Ended with exit code 0 [2022-12-14 13:17:17,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 13:17:18,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-12-14 13:17:18,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:17:18,209 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:17:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1853928431, now seen corresponding path program 6 times [2022-12-14 13:17:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:17:18,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330494941] [2022-12-14 13:17:18,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 13:17:18,212 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 13:17:18,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:17:18,213 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:17:18,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:17:18,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-14 13:17:18,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:17:18,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:17:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:17:18,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:17:18,758 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:17:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:17:18,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:17:18,987 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2022-12-14 13:17:18,987 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2022-12-14 13:17:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:17:19,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:17:19,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330494941] [2022-12-14 13:17:19,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330494941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:17:19,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1525447149] [2022-12-14 13:17:19,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 13:17:19,192 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:17:19,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:17:19,193 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:17:19,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 13:17:19,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:17:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496104675] [2022-12-14 13:17:19,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 13:17:19,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:17:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:17:19,541 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:17:19,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 13:17:19,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 1 [2022-12-14 13:17:19,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-14 13:17:19,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:17:19,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 13:17:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:17:19,746 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 13:17:19,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 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 13:17:20,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:17:20,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:17:20,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:17:20,432 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:17:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:20,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:17:22,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:17:22,488 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 440 treesize of output 203 [2022-12-14 13:17:38,849 WARN L233 SmtUtils]: Spent 16.35s on a formula simplification. DAG size of input: 74 DAG size of output: 26 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 13:17:38,850 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:17:38,850 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 868 treesize of output 740 [2022-12-14 13:17:55,236 WARN L233 SmtUtils]: Spent 16.37s on a formula simplification. DAG size of input: 74 DAG size of output: 26 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 13:17:55,236 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:17:55,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 700 treesize of output 468 [2022-12-14 13:17:55,344 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2022-12-14 13:17:55,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 428 treesize of output 297 [2022-12-14 13:17:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:56,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496104675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:17:56,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 13:17:56,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 12, 12] total 37 [2022-12-14 13:17:56,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101791259] [2022-12-14 13:17:56,220 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 13:17:56,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 13:17:56,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:17:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 13:17:56,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1207, Unknown=12, NotChecked=0, Total=1482 [2022-12-14 13:17:56,221 INFO L87 Difference]: Start difference. First operand 185 states and 452 transitions. Second operand has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:18:06,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:18:14,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:18:18,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:18:26,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:18:28,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:18:30,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:18:39,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:18:41,704 WARN L539 Checker$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 13:18:43,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:18:47,631 WARN L539 Checker$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 13:18:52,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:18:54,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:18:57,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:18:59,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:19:01,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:19:03,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:19:06,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:19:08,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:19:16,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:19:19,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:19:21,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:19:25,948 WARN L539 Checker$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 13:19:27,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:19:29,965 WARN L539 Checker$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 13:19:32,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:19:34,936 WARN L539 Checker$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 13:19:36,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:19:38,943 WARN L539 Checker$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 13:19:40,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:19:42,956 WARN L539 Checker$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 13:19:48,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:19:50,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:19:52,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:19:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:19:54,370 INFO L93 Difference]: Finished difference Result 1136 states and 2617 transitions. [2022-12-14 13:19:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-14 13:19:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 13:19:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:19:54,373 INFO L225 Difference]: With dead ends: 1136 [2022-12-14 13:19:54,373 INFO L226 Difference]: Without dead ends: 916 [2022-12-14 13:19:54,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=1585, Invalid=10091, Unknown=96, NotChecked=0, Total=11772 [2022-12-14 13:19:54,375 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 679 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 102 mSolverCounterUnsat, 250 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 250 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:19:54,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 0 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1627 Invalid, 250 Unknown, 0 Unchecked, 80.8s Time] [2022-12-14 13:19:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-12-14 13:19:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 258. [2022-12-14 13:19:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 256 states have (on average 2.59375) internal successors, (664), 257 states have internal predecessors, (664), 0 states have call successors, (0), 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 13:19:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 664 transitions. [2022-12-14 13:19:54,382 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 664 transitions. Word has length 21 [2022-12-14 13:19:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:19:54,382 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 664 transitions. [2022-12-14 13:19:54,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 664 transitions. [2022-12-14 13:19:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:19:54,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:19:54,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:19:54,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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)] Ended with exit code 0 [2022-12-14 13:19:54,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 13:19:54,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:19:54,785 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:19:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:19:54,786 INFO L85 PathProgramCache]: Analyzing trace with hash -990484649, now seen corresponding path program 7 times [2022-12-14 13:19:54,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:19:54,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475243432] [2022-12-14 13:19:54,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:19:54,788 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 13:19:54,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:19:54,790 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:19:54,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:19:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:19:55,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:55,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:19:55,283 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:19:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:19:55,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:55,565 INFO L321 Elim1Store]: treesize reduction 156, result has 3.1 percent of original size [2022-12-14 13:19:55,565 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 25 [2022-12-14 13:19:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:19:55,670 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:19:55,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475243432] [2022-12-14 13:19:55,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475243432] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:55,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1243039422] [2022-12-14 13:19:55,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:19:55,670 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:19:55,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:19:55,671 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:19:55,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-12-14 13:19:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 13:19:56,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:56,777 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 28 treesize of output 37 [2022-12-14 13:19:56,850 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 13:19:57,041 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 13:19:57,356 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 51 treesize of output 19 [2022-12-14 13:19:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:57,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:57,881 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1354 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1354) c_~queue~0.base)) (.cse2 (bvmul (_ bv4 32) c_~front~0))) (or (not (= (let ((.cse1 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1 .cse2)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1 .cse2))) (select .cse0 (bvadd c_~queue~0.offset .cse1 .cse2 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1 .cse2)))) (_ bv5 32))) (= (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse2)) (select .cse0 (bvadd c_~queue~0.offset .cse2 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse2 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse2))) (_ bv5 32))))) is different from false [2022-12-14 13:19:57,918 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1354 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1354) c_~queue~0.base)) (.cse2 (bvmul (_ bv4 32) c_~front~0))) (or (not (= (let ((.cse1 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 .cse2 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1 .cse2))) (select .cse0 (bvadd c_~queue~0.offset .cse1 .cse2 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1 .cse2)))) (_ bv5 32))) (= (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse2)) (select .cse0 (bvadd c_~queue~0.offset .cse2 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse2 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse2))) (_ bv5 32))))) is different from false [2022-12-14 13:19:58,128 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1354 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1353 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1353) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1354) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse2 (bvmul (_ bv4 32) c_~front~0))) (or (not (= (let ((.cse1 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv11 32) .cse1 .cse2)) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv10 32)))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv9 32)))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32) .cse1 .cse2)))) (_ bv5 32))) (= (concat (concat (concat (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv11 32) .cse2)) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv10 32)))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv9 32)))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32) .cse2))) (_ bv5 32))))) is different from false [2022-12-14 13:19:58,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:19:58,172 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 440 treesize of output 203 [2022-12-14 13:20:14,449 WARN L233 SmtUtils]: Spent 16.27s on a formula simplification. DAG size of input: 74 DAG size of output: 26 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 13:20:14,449 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:20:14,449 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 380 [2022-12-14 13:20:30,750 WARN L233 SmtUtils]: Spent 16.29s on a formula simplification. DAG size of input: 74 DAG size of output: 26 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 13:20:30,750 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:20:30,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 340 treesize of output 244 [2022-12-14 13:20:30,831 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2022-12-14 13:20:30,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 171 treesize of output 108 [2022-12-14 13:20:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2022-12-14 13:20:30,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1243039422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:20:30,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68893382] [2022-12-14 13:20:30,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:20:30,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:30,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:30,874 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:30,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 13:20:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:20:31,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:31,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:20:31,829 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:20:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:31,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:20:31,971 INFO L321 Elim1Store]: treesize reduction 156, result has 3.1 percent of original size [2022-12-14 13:20:31,971 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 25 [2022-12-14 13:20:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:33,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68893382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:20:33,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:20:33,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 12, 10, 11, 11] total 49 [2022-12-14 13:20:33,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829791373] [2022-12-14 13:20:33,660 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:20:33,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 13:20:33,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:20:33,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 13:20:33,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1954, Unknown=11, NotChecked=282, Total=2550 [2022-12-14 13:20:33,662 INFO L87 Difference]: Start difference. First operand 258 states and 664 transitions. Second operand has 51 states, 50 states have (on average 1.84) internal successors, (92), 50 states have internal predecessors, (92), 0 states have call successors, (0), 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 13:20:42,111 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 13:20:57,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:59,791 WARN L539 Checker$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 13:21:02,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:08,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:12,427 INFO L93 Difference]: Finished difference Result 919 states and 2126 transitions. [2022-12-14 13:21:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 13:21:12,429 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.84) internal successors, (92), 50 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 13:21:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:12,431 INFO L225 Difference]: With dead ends: 919 [2022-12-14 13:21:12,431 INFO L226 Difference]: Without dead ends: 745 [2022-12-14 13:21:12,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 69 SyntacticMatches, 13 SemanticMatches, 96 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 3115 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1065, Invalid=7855, Unknown=22, NotChecked=564, Total=9506 [2022-12-14 13:21:12,432 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 589 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 61 mSolverCounterUnsat, 190 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 190 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 27.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:12,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 0 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1715 Invalid, 190 Unknown, 323 Unchecked, 27.3s Time] [2022-12-14 13:21:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-12-14 13:21:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 197. [2022-12-14 13:21:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 195 states have (on average 2.4) internal successors, (468), 196 states have internal predecessors, (468), 0 states have call successors, (0), 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 13:21:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 468 transitions. [2022-12-14 13:21:12,438 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 468 transitions. Word has length 21 [2022-12-14 13:21:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:12,438 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 468 transitions. [2022-12-14 13:21:12,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.84) internal successors, (92), 50 states have internal predecessors, (92), 0 states have call successors, (0), 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 13:21:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 468 transitions. [2022-12-14 13:21:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 13:21:12,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:12,439 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:21:12,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:21:12,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-12-14 13:21:12,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-14 13:21:13,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:13,041 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:21:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:13,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1394731660, now seen corresponding path program 8 times [2022-12-14 13:21:13,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:21:13,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041816804] [2022-12-14 13:21:13,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:21:13,044 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 13:21:13,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:21:13,047 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:21:13,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (50)] Waiting until timeout for monitored process [2022-12-14 13:21:13,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:21:13,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:13,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:21:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:21:13,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:21:13,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:21:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041816804] [2022-12-14 13:21:13,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041816804] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914100092] [2022-12-14 13:21:13,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:21:13,471 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:21:13,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:21:13,472 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:21:13,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-12-14 13:21:13,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:21:13,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:21:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:21:13,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:21:13,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914100092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:13,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190523329] [2022-12-14 13:21:13,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:21:13,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:13,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:13,826 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:13,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 13:21:13,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:21:13,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:13,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:21:13,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:21:14,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:21:15,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190523329] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:15,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:21:15,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 10, 9] total 26 [2022-12-14 13:21:15,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947153543] [2022-12-14 13:21:15,200 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:15,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 13:21:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:21:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 13:21:15,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:21:15,201 INFO L87 Difference]: Start difference. First operand 197 states and 468 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:21:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:17,278 INFO L93 Difference]: Finished difference Result 382 states and 860 transitions. [2022-12-14 13:21:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 13:21:17,279 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 13:21:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:17,280 INFO L225 Difference]: With dead ends: 382 [2022-12-14 13:21:17,280 INFO L226 Difference]: Without dead ends: 307 [2022-12-14 13:21:17,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 13:21:17,280 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 177 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:17,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 0 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 13:21:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-12-14 13:21:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 259. [2022-12-14 13:21:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 257 states have (on average 2.5408560311284045) internal successors, (653), 258 states have internal predecessors, (653), 0 states have call successors, (0), 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 13:21:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 653 transitions. [2022-12-14 13:21:17,285 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 653 transitions. Word has length 22 [2022-12-14 13:21:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:17,285 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 653 transitions. [2022-12-14 13:21:17,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:21:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 653 transitions. [2022-12-14 13:21:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:21:17,286 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:17,286 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:21:17,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (50)] Ended with exit code 0 [2022-12-14 13:21:17,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-14 13:21:17,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-12-14 13:21:17,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:21:17,888 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:21:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash 968374537, now seen corresponding path program 9 times [2022-12-14 13:21:17,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:21:17,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176176879] [2022-12-14 13:21:17,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:21:17,891 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 13:21:17,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:21:17,892 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:21:17,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (53)] Waiting until timeout for monitored process [2022-12-14 13:21:18,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:21:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:18,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:21:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:18,222 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 26 treesize of output 24 [2022-12-14 13:21:18,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-12-14 13:21:18,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:18,715 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:21:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:21:18,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:19,495 INFO L321 Elim1Store]: treesize reduction 120, result has 25.5 percent of original size [2022-12-14 13:21:19,495 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 149 treesize of output 106 [2022-12-14 13:21:19,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:19,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 9 [2022-12-14 13:21:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:21:19,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:21:19,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176176879] [2022-12-14 13:21:19,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176176879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:19,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [542134239] [2022-12-14 13:21:19,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:21:19,917 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:21:19,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:21:19,918 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:21:19,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-12-14 13:21:20,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:21:20,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 13:21:20,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:20,863 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 28 treesize of output 37 [2022-12-14 13:21:20,971 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 13:21:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:21,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-12-14 13:21:22,009 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 51 treesize of output 19 [2022-12-14 13:21:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:22,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:22,127 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1578 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1578) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv15 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv14 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset (_ bv13 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv12 32))))) (_ bv5 32))) is different from false [2022-12-14 13:21:23,448 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1578 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1577 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse2 (bvmul (_ bv4 32) c_~front~0)) (.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1577))) (or (not (= (let ((.cse0 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv15 32))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv14 32) .cse1 .cse2))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 (_ bv13 32) .cse2))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv12 32))))) (_ bv5 32))) (= (_ bv5 32) (let ((.cse4 (select (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1578) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv15 32))) (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv14 32) .cse2))) (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv13 32) .cse2))) (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv12 32))))))))) is different from false [2022-12-14 13:21:23,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:23,496 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 428 treesize of output 191 [2022-12-14 13:21:23,669 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:21:23,670 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 500 treesize of output 420 [2022-12-14 13:21:23,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:23,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:23,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 170 [2022-12-14 13:21:23,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:23,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 254 treesize of output 142 [2022-12-14 13:21:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-12-14 13:21:24,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [542134239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:24,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287547239] [2022-12-14 13:21:24,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:21:24,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:24,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:24,698 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:24,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-14 13:21:24,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:21:24,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:24,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 13:21:24,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:24,895 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 13:21:25,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-12-14 13:21:25,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:21:25,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 48 [2022-12-14 13:21:25,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:25,757 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:21:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:25,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:26,413 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1578 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1626 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse2 (bvmul (_ bv4 32) c_~front~0)) (.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1626))) (or (not (= (let ((.cse0 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv15 32))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv14 32) .cse1 .cse2))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 (_ bv13 32) .cse2))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv12 32))))) (_ bv5 32))) (= (_ bv5 32) (let ((.cse4 (select (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1578) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv15 32))) (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv14 32) .cse2))) (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv13 32) .cse2))) (select .cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv12 32))))))))) is different from false [2022-12-14 13:21:26,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:26,464 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 428 treesize of output 191 [2022-12-14 13:21:26,617 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:21:26,618 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 304 treesize of output 260 [2022-12-14 13:21:26,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:26,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:26,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 159 treesize of output 131 [2022-12-14 13:21:26,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:26,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 122 treesize of output 66 [2022-12-14 13:21:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2022-12-14 13:21:27,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287547239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:27,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:21:27,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15, 12, 15, 12] total 51 [2022-12-14 13:21:27,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388645225] [2022-12-14 13:21:27,837 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:27,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 13:21:27,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:21:27,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 13:21:27,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2245, Unknown=5, NotChecked=294, Total=2756 [2022-12-14 13:21:27,840 INFO L87 Difference]: Start difference. First operand 259 states and 653 transitions. Second operand has 53 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 52 states have internal predecessors, (82), 0 states have call successors, (0), 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 13:21:33,413 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 13:21:35,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:38,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:21:40,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:42,646 WARN L539 Checker$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 13:21:45,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:47,334 WARN L539 Checker$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 13:21:50,515 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 13:21:50,546 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse1 (bvadd c_~queue~0.offset .cse7 (_ bv15 32))) (.cse2 (bvadd c_~queue~0.offset (_ bv14 32) .cse7)) (.cse3 (bvadd c_~queue~0.offset (_ bv13 32) .cse7)) (.cse4 (bvadd c_~queue~0.offset .cse7 (_ bv12 32)))) (and (forall ((v_ArrVal_1532 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1532) c_~queue~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))))) (forall ((v_ArrVal_1578 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1578) c_~queue~0.base))) (concat (concat (concat (select .cse5 .cse1) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4))) (_ bv5 32))) (= c_~x~0 (_ bv5 32)) (exists ((v_arrayElimCell_328 (_ BitVec 8)) (v_arrayElimCell_327 (_ BitVec 8)) (v_arrayElimCell_330 (_ BitVec 8)) (v_arrayElimCell_329 (_ BitVec 8))) (let ((.cse6 (concat (concat (concat v_arrayElimCell_329 v_arrayElimCell_327) v_arrayElimCell_328) v_arrayElimCell_330))) (and (= .cse6 c_~x~0) (= .cse6 (_ bv5 32)))))))) is different from false [2022-12-14 13:21:53,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:21:55,825 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 13:21:55,834 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse1 (bvadd c_~queue~0.offset .cse6 (_ bv15 32))) (.cse2 (bvadd c_~queue~0.offset (_ bv14 32) .cse6)) (.cse3 (bvadd c_~queue~0.offset (_ bv13 32) .cse6)) (.cse4 (bvadd c_~queue~0.offset .cse6 (_ bv12 32)))) (and (forall ((v_ArrVal_1532 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1532) c_~queue~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))))) (forall ((v_ArrVal_1578 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1578) c_~queue~0.base))) (concat (concat (concat (select .cse5 .cse1) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4))) (_ bv5 32)))))) is different from false [2022-12-14 13:21:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:58,422 INFO L93 Difference]: Finished difference Result 715 states and 1736 transitions. [2022-12-14 13:21:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 13:21:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 52 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 13:21:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:58,427 INFO L225 Difference]: With dead ends: 715 [2022-12-14 13:21:58,427 INFO L226 Difference]: Without dead ends: 708 [2022-12-14 13:21:58,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=500, Invalid=5213, Unknown=7, NotChecked=760, Total=6480 [2022-12-14 13:21:58,428 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 385 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 32 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:58,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 0 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1695 Invalid, 18 Unknown, 528 Unchecked, 25.2s Time] [2022-12-14 13:21:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-12-14 13:21:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 402. [2022-12-14 13:21:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 400 states have (on average 2.7075) internal successors, (1083), 401 states have internal predecessors, (1083), 0 states have call successors, (0), 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 13:21:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1083 transitions. [2022-12-14 13:21:58,435 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1083 transitions. Word has length 24 [2022-12-14 13:21:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:58,435 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 1083 transitions. [2022-12-14 13:21:58,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 52 states have internal predecessors, (82), 0 states have call successors, (0), 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 13:21:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1083 transitions. [2022-12-14 13:21:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:21:58,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:58,436 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:21:58,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-12-14 13:21:58,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-14 13:21:58,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (53)] Ended with exit code 0 [2022-12-14 13:21:59,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:21:59,039 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 13:21:59,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1569268093, now seen corresponding path program 10 times [2022-12-14 13:21:59,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:21:59,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457267014] [2022-12-14 13:21:59,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:21:59,042 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 13:21:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:21:59,043 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 13:21:59,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (56)] Waiting until timeout for monitored process [2022-12-14 13:21:59,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:21:59,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:59,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 13:21:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:59,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:59,704 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:21:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:21:59,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:59,922 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2022-12-14 13:21:59,922 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2022-12-14 13:22:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:22:00,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:22:00,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457267014] [2022-12-14 13:22:00,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457267014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:22:00,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614733772] [2022-12-14 13:22:00,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:22:00,059 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:22:00,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:22:00,060 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:22:00,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-12-14 13:22:01,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:22:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:22:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 13:22:01,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:22:02,199 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 28 treesize of output 37 [2022-12-14 13:22:02,281 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 13:22:02,632 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 13:22:03,060 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 51 treesize of output 19 [2022-12-14 13:22:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:03,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:22:04,034 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1712) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (or (= (_ bv5 32) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv15 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv14 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset (_ bv13 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv12 32))))) (not (= (let ((.cse2 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse2 .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse2 .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse2 .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse2 .cse1)))) (_ bv5 32)))))) is different from false [2022-12-14 13:22:04,071 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1712) c_~queue~0.base)) (.cse2 (bvmul (_ bv4 32) c_~front~0))) (or (not (= (let ((.cse1 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 .cse2 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1 .cse2))) (select .cse0 (bvadd c_~queue~0.offset .cse1 .cse2 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1 .cse2)))) (_ bv5 32))) (= (_ bv5 32) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse2 (_ bv15 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv14 32) .cse2))) (select .cse0 (bvadd c_~queue~0.offset (_ bv13 32) .cse2))) (select .cse0 (bvadd c_~queue~0.offset .cse2 (_ bv12 32)))))))) is different from false [2022-12-14 13:22:04,111 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1712) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (or (= (_ bv5 32) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv15 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv14 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset (_ bv13 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv12 32))))) (not (= (let ((.cse2 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse2 .cse1)) (select .cse0 (bvadd c_~queue~0.offset .cse2 .cse1 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse2 .cse1 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse2 .cse1)))) (_ bv5 32)))))) is different from false [2022-12-14 13:22:04,381 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1712 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1711 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1711) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1712) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse2 (bvmul (_ bv4 32) c_~front~0))) (or (not (= (let ((.cse1 (bvmul (_ bv4 32) c_~size~0))) (concat (concat (concat (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv15 32))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv14 32) .cse1 .cse2))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 (_ bv13 32) .cse2))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1 .cse2 (_ bv12 32))))) (_ bv5 32))) (= (concat (concat (concat (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv15 32))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv14 32) .cse2))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv13 32) .cse2))) (select .cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse2 (_ bv12 32)))) (_ bv5 32))))) is different from false [2022-12-14 13:22:04,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:22:04,433 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 440 treesize of output 203 [2022-12-14 13:22:20,753 WARN L233 SmtUtils]: Spent 16.31s on a formula simplification. DAG size of input: 74 DAG size of output: 26 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 13:22:20,753 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 13:22:20,753 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 868 treesize of output 740 [2022-12-14 13:22:20,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:20,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:28,925 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 13:22:28,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:22:28,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 450 [2022-12-14 13:22:28,991 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2022-12-14 13:22:28,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 564 treesize of output 297 [2022-12-14 13:22:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 11 not checked. [2022-12-14 13:22:29,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1614733772] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:22:29,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784487146] [2022-12-14 13:22:29,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:22:29,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:22:29,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:22:29,080 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:22:29,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-14 13:22:29,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:22:29,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:22:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 13:22:29,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:22:30,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:22:30,295 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 6 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 13:22:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:30,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:22:30,417 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2022-12-14 13:22:30,418 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 25 [2022-12-14 13:22:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:33,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784487146] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:22:33,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:22:33,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 15, 12, 14, 14] total 66 [2022-12-14 13:22:33,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404185448] [2022-12-14 13:22:33,107 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:22:33,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 13:22:33,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:22:33,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 13:22:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=3532, Unknown=11, NotChecked=508, Total=4556 [2022-12-14 13:22:33,108 INFO L87 Difference]: Start difference. First operand 402 states and 1083 transitions. Second operand has 68 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 67 states have internal predecessors, (111), 0 states have call successors, (0), 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 13:22:42,958 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 13:22:45,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:22:47,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:22:56,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:23:01,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:23:03,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:23:10,408 WARN L539 Checker$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 13:23:12,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:23:15,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:23:17,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:23:19,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:23:27,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:23:29,146 WARN L539 Checker$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 13:23:39,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:23:56,866 WARN L539 Checker$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 13:23:58,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:24:01,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:24:04,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:24:16,433 WARN L539 Checker$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 13:24:20,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:24:24,372 WARN L539 Checker$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 13:24:50,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:25:18,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-12-14 13:25:18,511 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-12-14 13:25:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-12-14 13:25:18,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 76 SyntacticMatches, 14 SemanticMatches, 165 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 9581 ImplicationChecksByTransitivity, 103.9s TimeCoverageRelationStatistics Valid=2492, Invalid=23874, Unknown=56, NotChecked=1300, Total=27722 [2022-12-14 13:25:18,514 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 722 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2966 mSolverCounterSat, 136 mSolverCounterUnsat, 56 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2966 IncrementalHoareTripleChecker+Invalid, 56 IncrementalHoareTripleChecker+Unknown, 689 IncrementalHoareTripleChecker+Unchecked, 64.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:25:18,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 0 Invalid, 3847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2966 Invalid, 56 Unknown, 689 Unchecked, 64.1s Time] [2022-12-14 13:25:18,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-12-14 13:25:18,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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 (56)] Forceful destruction successful, exit code 0 [2022-12-14 13:25:18,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-12-14 13:25:19,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/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=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:25:19,117 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:933) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:772) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:346) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 48 more [2022-12-14 13:25:19,124 INFO L158 Benchmark]: Toolchain (without parser) took 711823.61ms. Allocated memory was 69.2MB in the beginning and 100.7MB in the end (delta: 31.5MB). Free memory was 47.2MB in the beginning and 35.8MB in the end (delta: 11.4MB). Peak memory consumption was 46.7MB. Max. memory is 16.1GB. [2022-12-14 13:25:19,125 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 69.2MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:25:19,125 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.62ms. Allocated memory is still 69.2MB. Free memory was 47.0MB in the beginning and 33.4MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 13:25:19,126 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.13ms. Allocated memory is still 69.2MB. Free memory was 33.1MB in the beginning and 31.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:25:19,126 INFO L158 Benchmark]: Boogie Preprocessor took 22.35ms. Allocated memory is still 69.2MB. Free memory was 31.3MB in the beginning and 29.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:25:19,126 INFO L158 Benchmark]: RCFGBuilder took 595.06ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 29.5MB in the beginning and 53.5MB in the end (delta: -24.0MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2022-12-14 13:25:19,127 INFO L158 Benchmark]: TraceAbstraction took 710963.95ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 52.6MB in the beginning and 35.8MB in the end (delta: 16.8MB). Peak memory consumption was 35.2MB. Max. memory is 16.1GB. [2022-12-14 13:25:19,128 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 69.2MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 208.62ms. Allocated memory is still 69.2MB. Free memory was 47.0MB in the beginning and 33.4MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.13ms. Allocated memory is still 69.2MB. Free memory was 33.1MB in the beginning and 31.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.35ms. Allocated memory is still 69.2MB. Free memory was 31.3MB in the beginning and 29.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 595.06ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 29.5MB in the beginning and 53.5MB in the end (delta: -24.0MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. * TraceAbstraction took 710963.95ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 52.6MB in the beginning and 35.8MB in the end (delta: 16.8MB). Peak memory consumption was 35.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11.4s, 130 PlacesBefore, 37 PlacesAfterwards, 132 TransitionsBefore, 33 TransitionsAfterwards, 660 CoEnabledTransitionPairs, 7 FixpointIterations, 92 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 144 TotalNumberOfCompositions, 931 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 889, independent: 875, independent conditional: 0, independent unconditional: 875, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 421, independent: 418, independent conditional: 0, independent unconditional: 418, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 421, independent: 418, independent conditional: 0, independent unconditional: 418, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 121, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 121, dependent conditional: 0, dependent unconditional: 121, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 889, independent: 457, independent conditional: 0, independent unconditional: 457, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 421, unknown conditional: 0, unknown unconditional: 421] , Statistics on independence cache: Total cache size (in pairs): 40, Positive cache size: 39, Positive conditional cache size: 0, Positive unconditional cache size: 39, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ab263b-c4ef-436d-a8c3-4f352930168c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")