./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-min-max-1.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_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/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_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/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_2733d9b3-8a35-405f-b950-cdfbac0973f3/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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --- 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 11:48:33,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:48:33,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:48:33,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:48:33,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:48:33,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:48:33,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:48:33,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:48:33,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:48:33,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:48:33,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:48:33,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:48:33,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:48:33,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:48:33,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:48:33,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:48:33,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:48:33,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:48:33,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:48:33,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:48:33,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:48:33,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:48:33,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:48:33,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:48:33,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:48:33,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:48:33,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:48:33,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:48:33,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:48:33,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:48:33,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:48:33,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:48:33,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:48:33,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:48:33,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:48:33,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:48:33,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:48:33,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:48:33,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:48:33,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:48:33,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:48:33,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 11:48:33,621 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:48:33,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:48:33,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:48:33,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:48:33,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:48:33,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:48:33,623 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:48:33,623 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:48:33,623 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:48:33,623 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:48:33,623 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:48:33,623 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:48:33,623 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:48:33,624 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:48:33,624 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:48:33,624 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:48:33,624 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:48:33,624 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:48:33,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:48:33,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:48:33,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:48:33,626 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:48:33,626 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:48:33,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:48:33,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:48:33,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:48:33,626 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:48:33,627 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:48:33,627 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 11:48:33,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:48:33,627 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:48:33,627 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:48:33,627 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:48:33,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:48:33,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:48:33,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:48:33,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:48:33,628 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:48:33,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:48:33,628 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:48:33,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:48:33,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:48:33,628 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_2733d9b3-8a35-405f-b950-cdfbac0973f3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 [2022-12-14 11:48:33,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:48:33,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:48:33,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:48:33,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:48:33,833 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:48:33,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-12-14 11:48:36,534 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:48:36,667 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:48:36,668 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-12-14 11:48:36,672 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/data/0effaa986/7e3c9001045148bc8f077a5ee2bd5bda/FLAG92e5fbf1b [2022-12-14 11:48:36,682 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/data/0effaa986/7e3c9001045148bc8f077a5ee2bd5bda [2022-12-14 11:48:36,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:48:36,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:48:36,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:48:36,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:48:36,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:48:36,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:48:36" (1/1) ... [2022-12-14 11:48:36,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d9b2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:36, skipping insertion in model container [2022-12-14 11:48:36,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:48:36" (1/1) ... [2022-12-14 11:48:36,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:48:36,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:48:36,813 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:36,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:36,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:36,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:36,816 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:36,817 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:36,819 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:36,820 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:36,820 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:36,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:36,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:36,822 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:36,823 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:36,825 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:36,834 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_2733d9b3-8a35-405f-b950-cdfbac0973f3/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-12-14 11:48:36,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:48:36,852 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 11:48:36,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@458cc035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:36, skipping insertion in model container [2022-12-14 11:48:36,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:48:36,853 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 11:48:36,855 INFO L158 Benchmark]: Toolchain (without parser) took 169.25ms. Allocated memory is still 125.8MB. Free memory was 93.0MB in the beginning and 82.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 11:48:36,855 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 125.8MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:48:36,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.63ms. Allocated memory is still 125.8MB. Free memory was 93.0MB in the beginning and 82.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 11:48:36,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 125.8MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 167.63ms. Allocated memory is still 125.8MB. Free memory was 93.0MB in the beginning and 82.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/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_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/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_2733d9b3-8a35-405f-b950-cdfbac0973f3/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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --- 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 11:48:38,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:48:38,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:48:38,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:48:38,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:48:38,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:48:38,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:48:38,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:48:38,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:48:38,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:48:38,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:48:38,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:48:38,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:48:38,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:48:38,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:48:38,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:48:38,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:48:38,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:48:38,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:48:38,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:48:38,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:48:38,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:48:38,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:48:38,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:48:38,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:48:38,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:48:38,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:48:38,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:48:38,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:48:38,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:48:38,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:48:38,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:48:38,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:48:38,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:48:38,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:48:38,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:48:38,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:48:38,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:48:38,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:48:38,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:48:38,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:48:38,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 11:48:38,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:48:38,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:48:38,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:48:38,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:48:38,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:48:38,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:48:38,260 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:48:38,260 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:48:38,260 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:48:38,260 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:48:38,260 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:48:38,260 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:48:38,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:48:38,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:48:38,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:48:38,262 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:48:38,262 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:48:38,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:48:38,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:48:38,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:48:38,262 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:48:38,263 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:48:38,263 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 11:48:38,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:48:38,263 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:48:38,263 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 11:48:38,264 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 11:48:38,264 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:48:38,264 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:48:38,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:48:38,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 11:48:38,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:48:38,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:48:38,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:48:38,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:48:38,265 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 11:48:38,265 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 11:48:38,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:48:38,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 11:48:38,266 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_2733d9b3-8a35-405f-b950-cdfbac0973f3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 [2022-12-14 11:48:38,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:48:38,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:48:38,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:48:38,499 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:48:38,499 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:48:38,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-12-14 11:48:41,189 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:48:41,363 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:48:41,363 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-12-14 11:48:41,368 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/data/a3483c0a7/30e91fab423b4899978331c9e52dfdc3/FLAG750ae90b2 [2022-12-14 11:48:41,381 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/data/a3483c0a7/30e91fab423b4899978331c9e52dfdc3 [2022-12-14 11:48:41,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:48:41,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:48:41,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:48:41,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:48:41,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:48:41,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a25db48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41, skipping insertion in model container [2022-12-14 11:48:41,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:48:41,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:48:41,542 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,543 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,543 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,544 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,551 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,552 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,552 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,552 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,554 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,566 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_2733d9b3-8a35-405f-b950-cdfbac0973f3/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-12-14 11:48:41,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:48:41,590 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 11:48:41,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:48:41,600 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,601 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,601 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,602 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,603 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,604 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,605 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,606 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,606 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,607 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,608 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,609 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,610 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,611 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,616 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_2733d9b3-8a35-405f-b950-cdfbac0973f3/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-12-14 11:48:41,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:48:41,626 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:48:41,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,642 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,645 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,646 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,647 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:48:41,648 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:48:41,653 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_2733d9b3-8a35-405f-b950-cdfbac0973f3/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-12-14 11:48:41,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:48:41,671 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:48:41,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41 WrapperNode [2022-12-14 11:48:41,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:48:41,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:48:41,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:48:41,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:48:41,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,711 INFO L138 Inliner]: procedures = 27, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 118 [2022-12-14 11:48:41,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:48:41,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:48:41,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:48:41,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:48:41,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,744 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:48:41,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:48:41,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:48:41,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:48:41,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (1/1) ... [2022-12-14 11:48:41,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:48:41,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:41,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:48:41,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:48:41,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:48:41,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 11:48:41,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:48:41,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 11:48:41,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 11:48:41,813 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 11:48:41,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 11:48:41,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 11:48:41,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 11:48:41,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 11:48:41,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 11:48:41,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 11:48:41,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:48:41,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:48:41,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:48:41,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:48:41,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 11:48:41,816 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 11:48:41,920 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:48:41,922 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:48:42,360 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:48:42,436 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:48:42,436 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 11:48:42,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:48:42 BoogieIcfgContainer [2022-12-14 11:48:42,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:48:42,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:48:42,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:48:42,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:48:42,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:48:41" (1/3) ... [2022-12-14 11:48:42,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e11a8d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:48:42, skipping insertion in model container [2022-12-14 11:48:42,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:41" (2/3) ... [2022-12-14 11:48:42,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e11a8d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:48:42, skipping insertion in model container [2022-12-14 11:48:42,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:48:42" (3/3) ... [2022-12-14 11:48:42,445 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2022-12-14 11:48:42,458 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:48:42,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-14 11:48:42,459 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 11:48:42,520 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 11:48:42,553 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:48:42,567 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 204 transitions, 432 flow [2022-12-14 11:48:42,570 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 204 transitions, 432 flow [2022-12-14 11:48:42,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 204 transitions, 432 flow [2022-12-14 11:48:42,641 INFO L130 PetriNetUnfolder]: 12/201 cut-off events. [2022-12-14 11:48:42,641 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 11:48:42,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 12/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 222 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-14 11:48:42,649 INFO L119 LiptonReduction]: Number of co-enabled transitions 2358 [2022-12-14 11:49:04,947 INFO L134 LiptonReduction]: Checked pairs total: 4480 [2022-12-14 11:49:04,948 INFO L136 LiptonReduction]: Total number of compositions: 220 [2022-12-14 11:49:04,953 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 57 transitions, 138 flow [2022-12-14 11:49:05,007 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1340 states, 1058 states have (on average 3.879962192816635) internal successors, (4105), 1339 states have internal predecessors, (4105), 0 states have call successors, (0), 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 11:49:05,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:49:05,024 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;@4766c6d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:49:05,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2022-12-14 11:49:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 1340 states, 1058 states have (on average 3.879962192816635) internal successors, (4105), 1339 states have internal predecessors, (4105), 0 states have call successors, (0), 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 11:49:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:49:05,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:05,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:49:05,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash 25986, now seen corresponding path program 1 times [2022-12-14 11:49:05,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:05,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874341835] [2022-12-14 11:49:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:05,048 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 11:49:05,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:05,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:05,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:05,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:49:05,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:05,279 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 11:49:05,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 11:49:05,306 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 11:49:05,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:05,307 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874341835] [2022-12-14 11:49:05,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874341835] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:05,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:05,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:49:05,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565364829] [2022-12-14 11:49:05,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:05,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:49:05,342 INFO L87 Difference]: Start difference. First operand has 1340 states, 1058 states have (on average 3.879962192816635) internal successors, (4105), 1339 states have internal predecessors, (4105), 0 states have call successors, (0), 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 11:49:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:05,534 INFO L93 Difference]: Finished difference Result 881 states and 2678 transitions. [2022-12-14 11:49:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:05,536 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 11:49:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:05,553 INFO L225 Difference]: With dead ends: 881 [2022-12-14 11:49:05,553 INFO L226 Difference]: Without dead ends: 881 [2022-12-14 11:49:05,554 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 11:49:05,557 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:05,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 2 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:49:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-12-14 11:49:05,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 881. [2022-12-14 11:49:05,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 730 states have (on average 3.6684931506849314) internal successors, (2678), 880 states have internal predecessors, (2678), 0 states have call successors, (0), 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 11:49:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2678 transitions. [2022-12-14 11:49:05,640 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2678 transitions. Word has length 2 [2022-12-14 11:49:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:05,641 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 2678 transitions. [2022-12-14 11:49:05,641 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 11:49:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2678 transitions. [2022-12-14 11:49:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:49:05,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:05,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:49:05,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:05,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:05,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:05,846 INFO L85 PathProgramCache]: Analyzing trace with hash 25849, now seen corresponding path program 1 times [2022-12-14 11:49:05,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:05,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715449248] [2022-12-14 11:49:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:05,848 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 11:49:05,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:05,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:05,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:05,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:49:05,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:06,065 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:06,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:06,099 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 11:49:06,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:06,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:06,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715449248] [2022-12-14 11:49:06,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715449248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:06,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:06,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:49:06,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127535356] [2022-12-14 11:49:06,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:06,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:06,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:06,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:49:06,103 INFO L87 Difference]: Start difference. First operand 881 states and 2678 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 11:49:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:06,446 INFO L93 Difference]: Finished difference Result 1759 states and 5353 transitions. [2022-12-14 11:49:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:06,447 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 11:49:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:06,463 INFO L225 Difference]: With dead ends: 1759 [2022-12-14 11:49:06,463 INFO L226 Difference]: Without dead ends: 1759 [2022-12-14 11:49:06,464 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 11:49:06,465 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:06,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:49:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-12-14 11:49:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 882. [2022-12-14 11:49:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 731 states have (on average 3.6689466484268127) internal successors, (2682), 881 states have internal predecessors, (2682), 0 states have call successors, (0), 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 11:49:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2682 transitions. [2022-12-14 11:49:06,494 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2682 transitions. Word has length 2 [2022-12-14 11:49:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:06,495 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 2682 transitions. [2022-12-14 11:49:06,495 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 11:49:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2682 transitions. [2022-12-14 11:49:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:49:06,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:06,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:49:06,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:06,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:06,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:06,699 INFO L85 PathProgramCache]: Analyzing trace with hash 26011, now seen corresponding path program 1 times [2022-12-14 11:49:06,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:06,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295473567] [2022-12-14 11:49:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:06,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:49:06,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:06,707 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:06,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:06,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:49:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:06,856 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 11:49:06,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:06,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:06,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295473567] [2022-12-14 11:49:06,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295473567] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:06,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:06,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:49:06,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409809073] [2022-12-14 11:49:06,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:06,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:06,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:06,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:06,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:49:06,858 INFO L87 Difference]: Start difference. First operand 882 states and 2682 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 11:49:07,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:07,087 INFO L93 Difference]: Finished difference Result 882 states and 2679 transitions. [2022-12-14 11:49:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:07,088 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 11:49:07,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:07,092 INFO L225 Difference]: With dead ends: 882 [2022-12-14 11:49:07,092 INFO L226 Difference]: Without dead ends: 882 [2022-12-14 11:49:07,092 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 11:49:07,093 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:07,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:49:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-12-14 11:49:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2022-12-14 11:49:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 731 states have (on average 3.6648426812585497) internal successors, (2679), 881 states have internal predecessors, (2679), 0 states have call successors, (0), 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 11:49:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2679 transitions. [2022-12-14 11:49:07,112 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2679 transitions. Word has length 2 [2022-12-14 11:49:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:07,112 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 2679 transitions. [2022-12-14 11:49:07,112 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 11:49:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2679 transitions. [2022-12-14 11:49:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:49:07,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:07,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:49:07,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 11:49:07,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:07,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash 805685, now seen corresponding path program 1 times [2022-12-14 11:49:07,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:07,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608316062] [2022-12-14 11:49:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:07,314 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 11:49:07,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:07,315 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:07,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:49:07,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:07,477 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:07,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:07,533 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 11:49:07,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:07,755 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 11:49:07,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:07,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608316062] [2022-12-14 11:49:07,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608316062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:07,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1904180441] [2022-12-14 11:49:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:07,756 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:07,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:49:07,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:49:07,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 11:49:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:49:07,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:07,987 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:07,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:08,045 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 11:49:08,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:08,100 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 11:49:08,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1904180441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:08,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871421753] [2022-12-14 11:49:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:08,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:08,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:49:08,102 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:49:08,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:49:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:08,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:49:08,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:08,253 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:08,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:08,292 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 11:49:08,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:08,404 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 11:49:08,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871421753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:08,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:49:08,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-12-14 11:49:08,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167955219] [2022-12-14 11:49:08,405 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:49:08,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:49:08,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:08,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:49:08,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:49:08,406 INFO L87 Difference]: Start difference. First operand 882 states and 2679 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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 11:49:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:09,510 INFO L93 Difference]: Finished difference Result 1763 states and 5364 transitions. [2022-12-14 11:49:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:49:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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 3 [2022-12-14 11:49:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:09,517 INFO L225 Difference]: With dead ends: 1763 [2022-12-14 11:49:09,518 INFO L226 Difference]: Without dead ends: 1763 [2022-12-14 11:49:09,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:49:09,519 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 174 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:09,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 8 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:49:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2022-12-14 11:49:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 885. [2022-12-14 11:49:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 734 states have (on average 3.6689373297002725) internal successors, (2693), 884 states have internal predecessors, (2693), 0 states have call successors, (0), 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 11:49:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2693 transitions. [2022-12-14 11:49:09,542 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2693 transitions. Word has length 3 [2022-12-14 11:49:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:09,542 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 2693 transitions. [2022-12-14 11:49:09,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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 11:49:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2693 transitions. [2022-12-14 11:49:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:49:09,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:09,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:49:09,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:09,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:49:09,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 11:49:10,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:10,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:10,147 INFO L85 PathProgramCache]: Analyzing trace with hash 805847, now seen corresponding path program 1 times [2022-12-14 11:49:10,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:10,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44127119] [2022-12-14 11:49:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:10,148 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 11:49:10,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:10,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:10,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 11:49:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:10,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:49:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:10,308 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 11:49:10,309 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-14 11:49:10,329 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:49:10,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 11:49:10,560 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 11:49:10,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:10,707 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 11:49:10,707 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44127119] [2022-12-14 11:49:10,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44127119] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1724803710] [2022-12-14 11:49:10,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:10,708 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:10,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:49:10,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:49:10,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 11:49:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:10,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:49:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:10,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:10,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:10,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:10,921 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 11:49:10,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 28 [2022-12-14 11:49:10,931 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 11:49:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:10,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:10,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1724803710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:10,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:49:10,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-12-14 11:49:10,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238163710] [2022-12-14 11:49:10,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:10,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:10,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:10,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:49:10,988 INFO L87 Difference]: Start difference. First operand 885 states and 2693 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:11,147 INFO L93 Difference]: Finished difference Result 756 states and 2241 transitions. [2022-12-14 11:49:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 11:49:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:11,150 INFO L225 Difference]: With dead ends: 756 [2022-12-14 11:49:11,150 INFO L226 Difference]: Without dead ends: 756 [2022-12-14 11:49:11,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:49:11,151 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:11,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 2 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:49:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-12-14 11:49:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 756. [2022-12-14 11:49:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 631 states have (on average 3.5515055467511885) internal successors, (2241), 755 states have internal predecessors, (2241), 0 states have call successors, (0), 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 11:49:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2241 transitions. [2022-12-14 11:49:11,167 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2241 transitions. Word has length 3 [2022-12-14 11:49:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:11,168 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 2241 transitions. [2022-12-14 11:49:11,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2241 transitions. [2022-12-14 11:49:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:49:11,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:11,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:49:11,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 11:49:11,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:11,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:11,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:11,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash 805848, now seen corresponding path program 1 times [2022-12-14 11:49:11,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:11,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162483219] [2022-12-14 11:49:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:11,575 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 11:49:11,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:11,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:11,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:11,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:49:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:11,706 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-14 11:49:11,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-12-14 11:49:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:11,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:11,736 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:11,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162483219] [2022-12-14 11:49:11,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162483219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:11,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:11,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:49:11,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107124044] [2022-12-14 11:49:11,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:11,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:11,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:11,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:49:11,737 INFO L87 Difference]: Start difference. First operand 756 states and 2241 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:11,870 INFO L93 Difference]: Finished difference Result 627 states and 1789 transitions. [2022-12-14 11:49:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:11,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 11:49:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:11,872 INFO L225 Difference]: With dead ends: 627 [2022-12-14 11:49:11,872 INFO L226 Difference]: Without dead ends: 627 [2022-12-14 11:49:11,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:49:11,873 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:11,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:49:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-12-14 11:49:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2022-12-14 11:49:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 528 states have (on average 3.3882575757575757) internal successors, (1789), 626 states have internal predecessors, (1789), 0 states have call successors, (0), 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 11:49:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1789 transitions. [2022-12-14 11:49:11,883 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1789 transitions. Word has length 3 [2022-12-14 11:49:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:11,883 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 1789 transitions. [2022-12-14 11:49:11,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1789 transitions. [2022-12-14 11:49:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 11:49:11,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:11,883 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1] [2022-12-14 11:49:11,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:12,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:12,085 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:12,086 INFO L85 PathProgramCache]: Analyzing trace with hash 24980737, now seen corresponding path program 1 times [2022-12-14 11:49:12,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:12,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501856732] [2022-12-14 11:49:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:12,088 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 11:49:12,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:12,090 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:12,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:12,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:49:12,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:12,245 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:12,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:49:12,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:12,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:12,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501856732] [2022-12-14 11:49:12,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501856732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:12,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:12,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:49:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514643695] [2022-12-14 11:49:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:12,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:12,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:12,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:49:12,284 INFO L87 Difference]: Start difference. First operand 627 states and 1789 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:12,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:12,406 INFO L93 Difference]: Finished difference Result 626 states and 1786 transitions. [2022-12-14 11:49:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:12,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 11:49:12,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:12,408 INFO L225 Difference]: With dead ends: 626 [2022-12-14 11:49:12,408 INFO L226 Difference]: Without dead ends: 626 [2022-12-14 11:49:12,409 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 11:49:12,409 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:12,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:49:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-12-14 11:49:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2022-12-14 11:49:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 528 states have (on average 3.382575757575758) internal successors, (1786), 625 states have internal predecessors, (1786), 0 states have call successors, (0), 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 11:49:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1786 transitions. [2022-12-14 11:49:12,421 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1786 transitions. Word has length 4 [2022-12-14 11:49:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:12,421 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 1786 transitions. [2022-12-14 11:49:12,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1786 transitions. [2022-12-14 11:49:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:49:12,422 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:12,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:49:12,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:12,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:12,623 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:12,625 INFO L85 PathProgramCache]: Analyzing trace with hash 774435820, now seen corresponding path program 1 times [2022-12-14 11:49:12,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:12,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485418561] [2022-12-14 11:49:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:12,626 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 11:49:12,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:12,629 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:12,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:49:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:12,765 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 11:49:12,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 11:49:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:12,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:12,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485418561] [2022-12-14 11:49:12,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485418561] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:12,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:12,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:49:12,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499555986] [2022-12-14 11:49:12,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:12,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:49:12,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:12,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:49:12,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:49:12,782 INFO L87 Difference]: Start difference. First operand 626 states and 1786 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:12,946 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2022-12-14 11:49:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:49:12,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:49:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:12,949 INFO L225 Difference]: With dead ends: 378 [2022-12-14 11:49:12,949 INFO L226 Difference]: Without dead ends: 378 [2022-12-14 11:49:12,950 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 11:49:12,950 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:12,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:49:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-12-14 11:49:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-12-14 11:49:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 336 states have (on average 3.1488095238095237) internal successors, (1058), 377 states have internal predecessors, (1058), 0 states have call successors, (0), 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 11:49:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1058 transitions. [2022-12-14 11:49:12,963 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1058 transitions. Word has length 5 [2022-12-14 11:49:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:12,963 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1058 transitions. [2022-12-14 11:49:12,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1058 transitions. [2022-12-14 11:49:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:49:12,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:12,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:49:12,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 11:49:13,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:13,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:13,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:13,167 INFO L85 PathProgramCache]: Analyzing trace with hash 774435821, now seen corresponding path program 1 times [2022-12-14 11:49:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:13,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243855082] [2022-12-14 11:49:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:13,169 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 11:49:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:13,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:13,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:49:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:13,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:13,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243855082] [2022-12-14 11:49:13,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243855082] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:13,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:13,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:49:13,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068599635] [2022-12-14 11:49:13,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:13,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:49:13,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:49:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:49:13,324 INFO L87 Difference]: Start difference. First operand 378 states and 1058 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:13,473 INFO L93 Difference]: Finished difference Result 278 states and 766 transitions. [2022-12-14 11:49:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:49:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:49:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:13,476 INFO L225 Difference]: With dead ends: 278 [2022-12-14 11:49:13,476 INFO L226 Difference]: Without dead ends: 278 [2022-12-14 11:49:13,476 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 11:49:13,477 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:13,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:49:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-12-14 11:49:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-12-14 11:49:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 255 states have (on average 3.003921568627451) internal successors, (766), 277 states have internal predecessors, (766), 0 states have call successors, (0), 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 11:49:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 766 transitions. [2022-12-14 11:49:13,481 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 766 transitions. Word has length 5 [2022-12-14 11:49:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:13,482 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 766 transitions. [2022-12-14 11:49:13,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 766 transitions. [2022-12-14 11:49:13,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:49:13,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:13,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:49:13,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:13,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:13,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash 774436029, now seen corresponding path program 1 times [2022-12-14 11:49:13,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:13,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058247279] [2022-12-14 11:49:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:13,686 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 11:49:13,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:13,689 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:13,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:13,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:49:13,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:13,837 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 11:49:13,837 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 11:49:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:13,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:13,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058247279] [2022-12-14 11:49:13,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058247279] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:13,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:13,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:49:13,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81480859] [2022-12-14 11:49:13,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:13,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:13,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:13,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:13,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:49:13,925 INFO L87 Difference]: Start difference. First operand 278 states and 766 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:14,056 INFO L93 Difference]: Finished difference Result 263 states and 731 transitions. [2022-12-14 11:49:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:49:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:14,058 INFO L225 Difference]: With dead ends: 263 [2022-12-14 11:49:14,058 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 11:49:14,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 11:49:14,059 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:14,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:49:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 11:49:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-12-14 11:49:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 244 states have (on average 2.9959016393442623) internal successors, (731), 262 states have internal predecessors, (731), 0 states have call successors, (0), 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 11:49:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 731 transitions. [2022-12-14 11:49:14,063 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 731 transitions. Word has length 5 [2022-12-14 11:49:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:14,063 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 731 transitions. [2022-12-14 11:49:14,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 731 transitions. [2022-12-14 11:49:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:49:14,064 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:14,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:49:14,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:14,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:14,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:14,266 INFO L85 PathProgramCache]: Analyzing trace with hash 774436030, now seen corresponding path program 1 times [2022-12-14 11:49:14,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:14,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434703972] [2022-12-14 11:49:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:14,269 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 11:49:14,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:14,272 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:14,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 11:49:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:49:14,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:14,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:14,493 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-12-14 11:49:14,493 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-12-14 11:49:14,509 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 11:49:14,658 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 11:49:14,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:14,849 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 11:49:14,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:14,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434703972] [2022-12-14 11:49:14,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434703972] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:14,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1811696122] [2022-12-14 11:49:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:14,849 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:49:14,850 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:49:14,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 11:49:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:15,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:49:15,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:15,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:15,098 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 11:49:15,099 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-14 11:49:15,112 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 39 treesize of output 37 [2022-12-14 11:49:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:15,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:15,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1811696122] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:15,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:49:15,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 11:49:15,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057821762] [2022-12-14 11:49:15,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:15,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:15,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:15,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:49:15,183 INFO L87 Difference]: Start difference. First operand 263 states and 731 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:15,310 INFO L93 Difference]: Finished difference Result 248 states and 696 transitions. [2022-12-14 11:49:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:15,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:49:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:15,313 INFO L225 Difference]: With dead ends: 248 [2022-12-14 11:49:15,313 INFO L226 Difference]: Without dead ends: 248 [2022-12-14 11:49:15,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:49:15,314 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:15,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:49:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-12-14 11:49:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-12-14 11:49:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 233 states have (on average 2.9871244635193133) internal successors, (696), 247 states have internal predecessors, (696), 0 states have call successors, (0), 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 11:49:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 696 transitions. [2022-12-14 11:49:15,318 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 696 transitions. Word has length 5 [2022-12-14 11:49:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:15,318 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 696 transitions. [2022-12-14 11:49:15,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 696 transitions. [2022-12-14 11:49:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:49:15,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:15,319 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 11:49:15,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 11:49:15,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-12-14 11:49:15,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:15,721 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:15,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1763306503, now seen corresponding path program 2 times [2022-12-14 11:49:15,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:15,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679649338] [2022-12-14 11:49:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:49:15,724 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 11:49:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:15,725 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:15,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:15,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:49:15,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:49:15,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:49:15,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:15,930 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:15,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:16,092 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 11:49:16,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:16,762 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 11:49:16,762 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:16,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679649338] [2022-12-14 11:49:16,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679649338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:16,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1523735952] [2022-12-14 11:49:16,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:49:16,762 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:16,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:49:16,763 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:49:16,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 11:49:16,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:49:16,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:49:16,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:49:16,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:17,029 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:17,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:17,081 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 11:49:17,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:17,223 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 11:49:17,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1523735952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:17,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451220745] [2022-12-14 11:49:17,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:49:17,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:49:17,225 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:49:17,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 11:49:17,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:49:17,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:49:17,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:49:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:17,435 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:17,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:17,625 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 11:49:17,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:17,758 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 11:49:17,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451220745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:17,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:49:17,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-12-14 11:49:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567068739] [2022-12-14 11:49:17,758 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:49:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:49:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:17,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:49:17,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:49:17,759 INFO L87 Difference]: Start difference. First operand 248 states and 696 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:21,323 INFO L93 Difference]: Finished difference Result 1941 states and 5503 transitions. [2022-12-14 11:49:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:49:21,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 11:49:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:21,330 INFO L225 Difference]: With dead ends: 1941 [2022-12-14 11:49:21,330 INFO L226 Difference]: Without dead ends: 1941 [2022-12-14 11:49:21,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:49:21,331 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 813 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:21,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 0 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 11:49:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-12-14 11:49:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 254. [2022-12-14 11:49:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 2.9623430962343096) internal successors, (708), 253 states have internal predecessors, (708), 0 states have call successors, (0), 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 11:49:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 708 transitions. [2022-12-14 11:49:21,344 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 708 transitions. Word has length 6 [2022-12-14 11:49:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:21,344 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 708 transitions. [2022-12-14 11:49:21,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 708 transitions. [2022-12-14 11:49:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:49:21,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:21,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:21,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 11:49:21,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 11:49:21,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:21,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:21,947 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1203698675, now seen corresponding path program 1 times [2022-12-14 11:49:21,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:21,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185700937] [2022-12-14 11:49:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:21,951 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 11:49:21,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:21,952 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:21,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:22,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:49:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:22,164 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-12-14 11:49:22,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-12-14 11:49:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:22,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:22,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:22,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185700937] [2022-12-14 11:49:22,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185700937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:22,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:22,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:49:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726373262] [2022-12-14 11:49:22,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:22,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:49:22,185 INFO L87 Difference]: Start difference. First operand 254 states and 708 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:22,261 INFO L93 Difference]: Finished difference Result 227 states and 630 transitions. [2022-12-14 11:49:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:22,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:49:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:22,263 INFO L225 Difference]: With dead ends: 227 [2022-12-14 11:49:22,263 INFO L226 Difference]: Without dead ends: 227 [2022-12-14 11:49:22,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 11:49:22,264 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:22,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:49:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-12-14 11:49:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-12-14 11:49:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 217 states have (on average 2.903225806451613) internal successors, (630), 226 states have internal predecessors, (630), 0 states have call successors, (0), 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 11:49:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 630 transitions. [2022-12-14 11:49:22,270 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 630 transitions. Word has length 7 [2022-12-14 11:49:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:22,271 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 630 transitions. [2022-12-14 11:49:22,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 630 transitions. [2022-12-14 11:49:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:49:22,271 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:22,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:22,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:22,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:22,473 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:22,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1203698676, now seen corresponding path program 1 times [2022-12-14 11:49:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:22,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98625691] [2022-12-14 11:49:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:22,476 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 11:49:22,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:22,478 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:22,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 11:49:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:22,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:49:22,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:22,704 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:22,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:22,903 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 11:49:22,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:23,130 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 11:49:23,131 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98625691] [2022-12-14 11:49:23,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98625691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917817600] [2022-12-14 11:49:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:23,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:23,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:49:23,132 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:49:23,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 11:49:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:23,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:49:23,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:23,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:23,369 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 11:49:23,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 11:49:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:23,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:23,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917817600] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:23,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:49:23,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 11:49:23,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124535719] [2022-12-14 11:49:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:23,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:23,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:23,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:49:23,459 INFO L87 Difference]: Start difference. First operand 227 states and 630 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:23,572 INFO L93 Difference]: Finished difference Result 200 states and 552 transitions. [2022-12-14 11:49:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:49:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:23,574 INFO L225 Difference]: With dead ends: 200 [2022-12-14 11:49:23,574 INFO L226 Difference]: Without dead ends: 200 [2022-12-14 11:49:23,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:49:23,574 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 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 11:49:23,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 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 11:49:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-14 11:49:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-12-14 11:49:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 2.830769230769231) internal successors, (552), 199 states have internal predecessors, (552), 0 states have call successors, (0), 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 11:49:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 552 transitions. [2022-12-14 11:49:23,578 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 552 transitions. Word has length 7 [2022-12-14 11:49:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:23,578 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 552 transitions. [2022-12-14 11:49:23,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 552 transitions. [2022-12-14 11:49:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:49:23,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:23,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:23,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 11:49:23,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:23,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:23,980 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:23,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1203503062, now seen corresponding path program 1 times [2022-12-14 11:49:23,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:23,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105003426] [2022-12-14 11:49:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:23,983 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 11:49:23,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:23,984 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:23,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:49:24,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:24,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:24,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:24,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105003426] [2022-12-14 11:49:24,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105003426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:24,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:24,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:49:24,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150058941] [2022-12-14 11:49:24,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:24,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:49:24,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:24,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:49:24,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:49:24,106 INFO L87 Difference]: Start difference. First operand 200 states and 552 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:24,295 INFO L93 Difference]: Finished difference Result 290 states and 798 transitions. [2022-12-14 11:49:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:49:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:49:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:24,298 INFO L225 Difference]: With dead ends: 290 [2022-12-14 11:49:24,298 INFO L226 Difference]: Without dead ends: 290 [2022-12-14 11:49:24,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:49:24,298 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:24,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:49:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-12-14 11:49:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 232. [2022-12-14 11:49:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 2.986784140969163) internal successors, (678), 231 states have internal predecessors, (678), 0 states have call successors, (0), 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 11:49:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 678 transitions. [2022-12-14 11:49:24,302 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 678 transitions. Word has length 7 [2022-12-14 11:49:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:24,303 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 678 transitions. [2022-12-14 11:49:24,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 678 transitions. [2022-12-14 11:49:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:49:24,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:24,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:24,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:24,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:24,505 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1346106131, now seen corresponding path program 1 times [2022-12-14 11:49:24,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:24,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649262601] [2022-12-14 11:49:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:24,507 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 11:49:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:24,510 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:24,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:24,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:49:24,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:24,707 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:24,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:24,796 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 11:49:24,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:25,146 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 11:49:25,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:25,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649262601] [2022-12-14 11:49:25,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649262601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:25,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1387453155] [2022-12-14 11:49:25,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:25,147 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:25,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:49:25,147 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:49:25,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 11:49:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:25,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:49:25,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:25,460 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 11:49:25,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:25,694 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 11:49:25,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1387453155] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100781869] [2022-12-14 11:49:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:25,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:25,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:49:25,695 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:49:25,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 11:49:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:25,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:49:25,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:25,849 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 11:49:25,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:25,916 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 11:49:25,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100781869] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:25,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:49:25,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 11:49:25,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217531198] [2022-12-14 11:49:25,917 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:49:25,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:49:25,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:25,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:49:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:49:25,918 INFO L87 Difference]: Start difference. First operand 232 states and 678 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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 11:49:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:28,309 INFO L93 Difference]: Finished difference Result 573 states and 1641 transitions. [2022-12-14 11:49:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 11:49:28,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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 8 [2022-12-14 11:49:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:28,312 INFO L225 Difference]: With dead ends: 573 [2022-12-14 11:49:28,312 INFO L226 Difference]: Without dead ends: 573 [2022-12-14 11:49:28,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:49:28,312 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 570 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:28,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 0 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 11:49:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-12-14 11:49:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 457. [2022-12-14 11:49:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 452 states have (on average 3.099557522123894) internal successors, (1401), 456 states have internal predecessors, (1401), 0 states have call successors, (0), 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 11:49:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1401 transitions. [2022-12-14 11:49:28,325 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1401 transitions. Word has length 8 [2022-12-14 11:49:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:28,325 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 1401 transitions. [2022-12-14 11:49:28,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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 11:49:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1401 transitions. [2022-12-14 11:49:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:49:28,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:28,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:28,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 11:49:28,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 11:49:28,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:28,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:28,929 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:28,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1408049768, now seen corresponding path program 1 times [2022-12-14 11:49:28,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:28,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488825324] [2022-12-14 11:49:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:28,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:49:28,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:28,933 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:28,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 11:49:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:29,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:49:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:49:29,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:29,128 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:29,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488825324] [2022-12-14 11:49:29,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488825324] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:29,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:29,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:49:29,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582631930] [2022-12-14 11:49:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:29,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:49:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:49:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:49:29,129 INFO L87 Difference]: Start difference. First operand 457 states and 1401 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:29,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:29,332 INFO L93 Difference]: Finished difference Result 627 states and 1933 transitions. [2022-12-14 11:49:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:49:29,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 11:49:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:29,335 INFO L225 Difference]: With dead ends: 627 [2022-12-14 11:49:29,335 INFO L226 Difference]: Without dead ends: 627 [2022-12-14 11:49:29,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:49:29,335 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:29,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:49:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-12-14 11:49:29,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 539. [2022-12-14 11:49:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 3.2677902621722845) internal successors, (1745), 538 states have internal predecessors, (1745), 0 states have call successors, (0), 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 11:49:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1745 transitions. [2022-12-14 11:49:29,346 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1745 transitions. Word has length 9 [2022-12-14 11:49:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:29,347 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 1745 transitions. [2022-12-14 11:49:29,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1745 transitions. [2022-12-14 11:49:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 11:49:29,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:29,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:29,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:29,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:29,549 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash 699873412, now seen corresponding path program 1 times [2022-12-14 11:49:29,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:29,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863053608] [2022-12-14 11:49:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:29,552 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 11:49:29,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:29,555 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:29,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 11:49:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:29,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:49:29,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:29,776 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:29,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:29,931 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 11:49:29,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:30,297 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 11:49:30,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:30,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863053608] [2022-12-14 11:49:30,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863053608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:30,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [509136232] [2022-12-14 11:49:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:30,297 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:30,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:49:30,298 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:49:30,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 11:49:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:30,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:49:30,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:30,612 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 11:49:30,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:30,845 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 11:49:30,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [509136232] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:30,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999564025] [2022-12-14 11:49:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:30,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:30,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:49:30,846 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:49:30,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 11:49:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:30,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:49:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:31,011 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 11:49:31,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:31,075 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 11:49:31,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999564025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:31,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:49:31,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 11:49:31,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154640072] [2022-12-14 11:49:31,076 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:49:31,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:49:31,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:49:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:49:31,077 INFO L87 Difference]: Start difference. First operand 539 states and 1745 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:33,685 INFO L93 Difference]: Finished difference Result 811 states and 2561 transitions. [2022-12-14 11:49:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 11:49:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 11:49:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:33,688 INFO L225 Difference]: With dead ends: 811 [2022-12-14 11:49:33,688 INFO L226 Difference]: Without dead ends: 811 [2022-12-14 11:49:33,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:49:33,689 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 473 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:33,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 0 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 11:49:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-12-14 11:49:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 731. [2022-12-14 11:49:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 726 states have (on average 3.3071625344352618) internal successors, (2401), 730 states have internal predecessors, (2401), 0 states have call successors, (0), 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 11:49:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2401 transitions. [2022-12-14 11:49:33,699 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2401 transitions. Word has length 10 [2022-12-14 11:49:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:33,699 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 2401 transitions. [2022-12-14 11:49:33,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2401 transitions. [2022-12-14 11:49:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:49:33,700 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:33,700 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 11:49:33,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 11:49:33,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 11:49:34,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-12-14 11:49:34,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:34,302 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:49:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:34,303 INFO L85 PathProgramCache]: Analyzing trace with hash -279344519, now seen corresponding path program 3 times [2022-12-14 11:49:34,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:34,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183132837] [2022-12-14 11:49:34,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:49:34,305 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 11:49:34,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:34,308 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:49:34,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 11:49:34,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:49:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:49:34,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:49:34,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:34,585 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:34,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:34,909 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 11:49:34,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:37,611 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 11:49:37,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183132837] [2022-12-14 11:49:37,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183132837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [270271441] [2022-12-14 11:49:37,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:49:37,612 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:49:37,612 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:49:37,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 11:49:38,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:49:38,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:49:38,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:49:38,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:38,302 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:38,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:38,484 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 11:49:38,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:41,381 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 11:49:41,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [270271441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:41,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68771698] [2022-12-14 11:49:41,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:49:41,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:41,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:49:41,383 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:49:41,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 11:49:43,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:49:43,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:49:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:49:43,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:43,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:49:43,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:49:43,865 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 11:49:43,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:44,172 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 11:49:44,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68771698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:44,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:49:44,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-12-14 11:49:44,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856357647] [2022-12-14 11:49:44,172 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:49:44,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 11:49:44,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:44,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 11:49:44,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 11:49:44,173 INFO L87 Difference]: Start difference. First operand 731 states and 2401 transitions. Second operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:50:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:50:04,323 INFO L93 Difference]: Finished difference Result 10605 states and 37275 transitions. [2022-12-14 11:50:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:50:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 11:50:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:50:04,367 INFO L225 Difference]: With dead ends: 10605 [2022-12-14 11:50:04,368 INFO L226 Difference]: Without dead ends: 10605 [2022-12-14 11:50:04,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=940, Invalid=1922, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 11:50:04,368 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3373 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4020 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3373 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:50:04,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3373 Valid, 0 Invalid, 4025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4020 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-12-14 11:50:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10605 states. [2022-12-14 11:50:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10605 to 743. [2022-12-14 11:50:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 738 states have (on average 3.285907859078591) internal successors, (2425), 742 states have internal predecessors, (2425), 0 states have call successors, (0), 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 11:50:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2425 transitions. [2022-12-14 11:50:04,473 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2425 transitions. Word has length 12 [2022-12-14 11:50:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:50:04,474 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 2425 transitions. [2022-12-14 11:50:04,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 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 11:50:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2425 transitions. [2022-12-14 11:50:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:50:04,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:50:04,475 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:50:04,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-14 11:50:04,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-12-14 11:50:04,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 11:50:05,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:50:05,078 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:50:05,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:50:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash 688876250, now seen corresponding path program 2 times [2022-12-14 11:50:05,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:50:05,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958706080] [2022-12-14 11:50:05,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:50:05,082 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 11:50:05,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:50:05,083 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:50:05,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 11:50:05,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:50:05,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:50:05,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:50:05,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:05,371 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:50:05,371 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:50:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:05,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:07,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:50:07,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958706080] [2022-12-14 11:50:07,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958706080] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [98917940] [2022-12-14 11:50:07,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:50:07,050 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:50:07,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:50:07,051 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:50:07,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 11:50:07,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:50:07,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:50:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:50:07,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:50:07,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:50:08,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [98917940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:08,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491144997] [2022-12-14 11:50:08,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:50:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:50:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:50:08,373 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:50:08,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 11:50:08,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:50:08,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:50:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:50:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:50:08,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:50:08,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491144997] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:08,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:50:08,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-12-14 11:50:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463194955] [2022-12-14 11:50:08,577 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:50:08,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 11:50:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:50:08,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 11:50:08,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:50:08,578 INFO L87 Difference]: Start difference. First operand 743 states and 2425 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 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 11:50:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:50:29,176 INFO L93 Difference]: Finished difference Result 2293 states and 7135 transitions. [2022-12-14 11:50:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 11:50:29,178 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 11:50:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:50:29,186 INFO L225 Difference]: With dead ends: 2293 [2022-12-14 11:50:29,186 INFO L226 Difference]: Without dead ends: 2293 [2022-12-14 11:50:29,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=811, Invalid=2611, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 11:50:29,188 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 866 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:50:29,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 0 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-12-14 11:50:29,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2022-12-14 11:50:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1237. [2022-12-14 11:50:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1232 states have (on average 3.3400974025974026) internal successors, (4115), 1236 states have internal predecessors, (4115), 0 states have call successors, (0), 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 11:50:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4115 transitions. [2022-12-14 11:50:29,228 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4115 transitions. Word has length 12 [2022-12-14 11:50:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:50:29,228 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 4115 transitions. [2022-12-14 11:50:29,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 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 11:50:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4115 transitions. [2022-12-14 11:50:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 11:50:29,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:50:29,230 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 11:50:29,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-12-14 11:50:29,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 11:50:29,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 11:50:29,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:50:29,832 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:50:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:50:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2083069613, now seen corresponding path program 3 times [2022-12-14 11:50:29,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:50:29,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662541673] [2022-12-14 11:50:29,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:50:29,835 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 11:50:29,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:50:29,836 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:50:29,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 11:50:30,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:50:30,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:50:30,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 11:50:30,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:30,256 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:50:30,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:50:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:30,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:30,710 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 8 treesize of output 6 [2022-12-14 11:50:30,726 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:50:30,728 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:50:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:32,994 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:50:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662541673] [2022-12-14 11:50:32,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662541673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [169160551] [2022-12-14 11:50:32,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:50:32,995 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:50:32,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:50:32,995 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:50:32,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 11:50:33,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:50:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:50:33,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:50:33,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:33,913 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:50:33,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:50:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:34,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:34,623 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 8 treesize of output 6 [2022-12-14 11:50:34,638 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:50:34,639 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:50:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:36,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [169160551] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:36,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85932114] [2022-12-14 11:50:36,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:50:36,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:50:36,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:50:36,896 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:50:36,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 11:50:37,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:50:37,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:50:37,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:50:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:50:38,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:50:39,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85932114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:39,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:50:39,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 57 [2022-12-14 11:50:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529538095] [2022-12-14 11:50:39,260 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:50:39,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 11:50:39,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:50:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 11:50:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2965, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 11:50:39,261 INFO L87 Difference]: Start difference. First operand 1237 states and 4115 transitions. Second operand has 58 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 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 11:52:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:52:05,605 INFO L93 Difference]: Finished difference Result 4282 states and 13620 transitions. [2022-12-14 11:52:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 11:52:05,608 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 11:52:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:52:05,617 INFO L225 Difference]: With dead ends: 4282 [2022-12-14 11:52:05,617 INFO L226 Difference]: Without dead ends: 4282 [2022-12-14 11:52:05,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3649 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=1654, Invalid=10336, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 11:52:05,619 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2198 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7872 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2198 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 7872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:52:05,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2198 Valid, 0 Invalid, 7912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 7872 Invalid, 0 Unknown, 0 Unchecked, 38.0s Time] [2022-12-14 11:52:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2022-12-14 11:52:05,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 2136. [2022-12-14 11:52:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2131 states have (on average 3.5241670577193807) internal successors, (7510), 2135 states have internal predecessors, (7510), 0 states have call successors, (0), 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 11:52:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7510 transitions. [2022-12-14 11:52:05,685 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7510 transitions. Word has length 14 [2022-12-14 11:52:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:52:05,686 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 7510 transitions. [2022-12-14 11:52:05,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 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 11:52:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7510 transitions. [2022-12-14 11:52:05,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 11:52:05,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:52:05,688 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:52:05,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-14 11:52:05,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 11:52:06,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 11:52:06,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:52:06,291 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:52:06,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:52:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash 68871596, now seen corresponding path program 2 times [2022-12-14 11:52:06,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:52:06,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867688073] [2022-12-14 11:52:06,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:52:06,294 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 11:52:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:52:06,295 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:52:06,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 11:52:06,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:52:06,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:52:06,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:52:06,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:06,566 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:52:06,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:52:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:06,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:08,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:52:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867688073] [2022-12-14 11:52:08,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867688073] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970964911] [2022-12-14 11:52:08,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:52:08,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:52:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:52:08,174 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:52:08,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 11:52:08,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:52:08,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:52:08,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:52:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:52:08,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:52:09,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1970964911] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:09,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594870527] [2022-12-14 11:52:09,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:52:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:52:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:52:09,451 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:52:09,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 11:52:09,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:52:09,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:52:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:52:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:09,697 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:52:09,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:52:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:52:10,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:10,300 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 8 treesize of output 6 [2022-12-14 11:52:10,316 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 44 treesize of output 9 [2022-12-14 11:52:10,323 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:52:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:52:11,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594870527] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:11,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:52:11,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 47 [2022-12-14 11:52:11,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505807080] [2022-12-14 11:52:11,821 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:52:11,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 11:52:11,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:52:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 11:52:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1926, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 11:52:11,822 INFO L87 Difference]: Start difference. First operand 2136 states and 7510 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 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 11:52:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:52:40,829 INFO L93 Difference]: Finished difference Result 3592 states and 11572 transitions. [2022-12-14 11:52:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 11:52:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 11:52:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:52:40,837 INFO L225 Difference]: With dead ends: 3592 [2022-12-14 11:52:40,837 INFO L226 Difference]: Without dead ends: 3592 [2022-12-14 11:52:40,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=956, Invalid=4896, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 11:52:40,838 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1156 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3464 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:52:40,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 0 Invalid, 3498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3464 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2022-12-14 11:52:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2022-12-14 11:52:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 2472. [2022-12-14 11:52:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2467 states have (on average 3.507904337251723) internal successors, (8654), 2471 states have internal predecessors, (8654), 0 states have call successors, (0), 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 11:52:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 8654 transitions. [2022-12-14 11:52:40,882 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 8654 transitions. Word has length 14 [2022-12-14 11:52:40,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:52:40,883 INFO L495 AbstractCegarLoop]: Abstraction has 2472 states and 8654 transitions. [2022-12-14 11:52:40,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 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 11:52:40,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 8654 transitions. [2022-12-14 11:52:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 11:52:40,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:52:40,884 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 11:52:40,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-12-14 11:52:41,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 11:52:41,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 11:52:41,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:52:41,486 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:52:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:52:41,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2078693850, now seen corresponding path program 4 times [2022-12-14 11:52:41,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:52:41,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785320273] [2022-12-14 11:52:41,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:52:41,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:52:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:52:41,492 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:52:41,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 11:52:41,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:52:41,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:52:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:52:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:41,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:43,116 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 38 treesize of output 32 [2022-12-14 11:52:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:43,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:52:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785320273] [2022-12-14 11:52:43,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785320273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727485154] [2022-12-14 11:52:43,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:52:43,996 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:52:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:52:43,996 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:52:43,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 11:52:44,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:52:44,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:52:44,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:52:44,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:44,334 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:52:44,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:52:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:45,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:47,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727485154] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:47,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781223657] [2022-12-14 11:52:47,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:52:47,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:52:47,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:52:47,710 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:52:47,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 11:52:47,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:52:47,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:52:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:52:47,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:47,934 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:52:47,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:52:49,297 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 7 treesize of output 5 [2022-12-14 11:52:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:52:49,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:49,522 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 8 treesize of output 6 [2022-12-14 11:52:49,540 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:52:49,542 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:52:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:52:53,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781223657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:53,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:52:53,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 12, 12] total 69 [2022-12-14 11:52:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159222545] [2022-12-14 11:52:53,843 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:52:53,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 11:52:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:52:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 11:52:53,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=4452, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 11:52:53,844 INFO L87 Difference]: Start difference. First operand 2472 states and 8654 transitions. Second operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 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 11:54:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:54:44,764 INFO L93 Difference]: Finished difference Result 10104 states and 31736 transitions. [2022-12-14 11:54:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-14 11:54:44,765 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 11:54:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:54:44,787 INFO L225 Difference]: With dead ends: 10104 [2022-12-14 11:54:44,787 INFO L226 Difference]: Without dead ends: 10104 [2022-12-14 11:54:44,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6883 ImplicationChecksByTransitivity, 96.2s TimeCoverageRelationStatistics Valid=3708, Invalid=19854, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 11:54:44,791 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6791 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11426 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6791 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 11426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:54:44,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6791 Valid, 0 Invalid, 11476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 11426 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2022-12-14 11:54:44,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10104 states. [2022-12-14 11:54:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10104 to 2660. [2022-12-14 11:54:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2660 states, 2655 states have (on average 3.560075329566855) internal successors, (9452), 2659 states have internal predecessors, (9452), 0 states have call successors, (0), 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 11:54:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2660 states to 2660 states and 9452 transitions. [2022-12-14 11:54:44,882 INFO L78 Accepts]: Start accepts. Automaton has 2660 states and 9452 transitions. Word has length 16 [2022-12-14 11:54:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:54:44,882 INFO L495 AbstractCegarLoop]: Abstraction has 2660 states and 9452 transitions. [2022-12-14 11:54:44,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 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 11:54:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2660 states and 9452 transitions. [2022-12-14 11:54:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 11:54:44,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:54:44,885 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 11:54:44,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-12-14 11:54:45,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-14 11:54:45,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 11:54:45,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:54:45,487 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:54:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:54:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1060546093, now seen corresponding path program 5 times [2022-12-14 11:54:45,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:54:45,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538749780] [2022-12-14 11:54:45,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:54:45,491 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 11:54:45,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:54:45,492 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:54:45,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 11:54:45,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:54:45,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:54:45,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 11:54:45,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:54:45,783 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:54:45,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:54:46,259 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 11:54:46,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:54:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:54:48,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:54:48,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538749780] [2022-12-14 11:54:48,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538749780] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:54:48,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [571937277] [2022-12-14 11:54:48,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:54:48,820 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:54:48,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:54:48,821 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:54:48,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 11:54:49,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:54:49,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:54:49,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:54:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:54:50,359 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 11:54:50,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:54:52,311 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 11:54:52,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [571937277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:54:52,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038187297] [2022-12-14 11:54:52,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:54:52,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:54:52,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:54:52,312 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:54:52,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 11:54:52,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:54:52,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:54:52,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:54:52,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:54:53,981 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 11:54:53,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:54:55,315 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 11:54:55,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038187297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:54:55,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:54:55,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-12-14 11:54:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943373214] [2022-12-14 11:54:55,316 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:54:55,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 11:54:55,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:54:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 11:54:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=4355, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 11:54:55,317 INFO L87 Difference]: Start difference. First operand 2660 states and 9452 transitions. Second operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 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 11:55:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:32,730 INFO L93 Difference]: Finished difference Result 3920 states and 12898 transitions. [2022-12-14 11:55:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 11:55:32,731 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 11:55:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:32,743 INFO L225 Difference]: With dead ends: 3920 [2022-12-14 11:55:32,743 INFO L226 Difference]: Without dead ends: 3920 [2022-12-14 11:55:32,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4246 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=2241, Invalid=11801, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 11:55:32,744 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2980 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9083 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2980 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 9083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:32,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2980 Valid, 0 Invalid, 9155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 9083 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time] [2022-12-14 11:55:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2022-12-14 11:55:32,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 2149. [2022-12-14 11:55:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2144 states have (on average 3.3521455223880596) internal successors, (7187), 2148 states have internal predecessors, (7187), 0 states have call successors, (0), 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 11:55:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 7187 transitions. [2022-12-14 11:55:32,779 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 7187 transitions. Word has length 16 [2022-12-14 11:55:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:32,779 INFO L495 AbstractCegarLoop]: Abstraction has 2149 states and 7187 transitions. [2022-12-14 11:55:32,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 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 11:55:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 7187 transitions. [2022-12-14 11:55:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 11:55:32,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:32,781 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:32,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-12-14 11:55:33,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 11:55:33,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-12-14 11:55:33,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:55:33,383 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:55:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1547106564, now seen corresponding path program 3 times [2022-12-14 11:55:33,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:55:33,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442011255] [2022-12-14 11:55:33,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:55:33,386 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 11:55:33,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:55:33,389 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:55:33,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 11:55:33,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:55:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:55:33,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:55:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:33,824 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:55:33,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:55:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:34,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:34,223 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 8 treesize of output 6 [2022-12-14 11:55:34,235 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 44 treesize of output 9 [2022-12-14 11:55:34,242 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:55:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:35,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:55:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442011255] [2022-12-14 11:55:35,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442011255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:55:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640954069] [2022-12-14 11:55:35,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:55:35,400 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:55:35,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:55:35,401 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:55:35,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-12-14 11:55:36,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:55:36,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:55:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:55:36,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:36,403 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:55:36,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:55:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:36,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:36,551 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 8 treesize of output 6 [2022-12-14 11:55:36,569 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 44 treesize of output 9 [2022-12-14 11:55:36,576 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:55:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:36,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640954069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:55:36,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680869908] [2022-12-14 11:55:36,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:55:36,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:36,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:36,717 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:36,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 11:55:37,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:55:37,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:55:37,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:55:37,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:37,118 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:55:37,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:55:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:55:37,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:37,455 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 8 treesize of output 6 [2022-12-14 11:55:37,469 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 44 treesize of output 9 [2022-12-14 11:55:37,476 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:55:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:55:38,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680869908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:55:38,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:55:38,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 30 [2022-12-14 11:55:38,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375882708] [2022-12-14 11:55:38,347 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:55:38,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 11:55:38,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:55:38,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 11:55:38,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-12-14 11:55:38,348 INFO L87 Difference]: Start difference. First operand 2149 states and 7187 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 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 11:55:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:52,280 INFO L93 Difference]: Finished difference Result 3065 states and 9383 transitions. [2022-12-14 11:55:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 11:55:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 11:55:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:52,287 INFO L225 Difference]: With dead ends: 3065 [2022-12-14 11:55:52,287 INFO L226 Difference]: Without dead ends: 3065 [2022-12-14 11:55:52,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=487, Invalid=1963, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 11:55:52,287 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1253 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:52,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 0 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-12-14 11:55:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-12-14 11:55:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2465. [2022-12-14 11:55:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 2460 states have (on average 3.2914634146341464) internal successors, (8097), 2464 states have internal predecessors, (8097), 0 states have call successors, (0), 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 11:55:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 8097 transitions. [2022-12-14 11:55:52,319 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 8097 transitions. Word has length 16 [2022-12-14 11:55:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:52,319 INFO L495 AbstractCegarLoop]: Abstraction has 2465 states and 8097 transitions. [2022-12-14 11:55:52,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 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 11:55:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 8097 transitions. [2022-12-14 11:55:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 11:55:52,321 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:52,321 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:52,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-12-14 11:55:52,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-12-14 11:55:52,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 11:55:52,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:52,924 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:55:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:52,925 INFO L85 PathProgramCache]: Analyzing trace with hash -51243860, now seen corresponding path program 4 times [2022-12-14 11:55:52,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:55:52,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438445140] [2022-12-14 11:55:52,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:55:52,927 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 11:55:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:55:52,928 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:55:52,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-12-14 11:55:53,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:55:53,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:55:53,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:55:53,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:53,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:54,647 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 38 treesize of output 32 [2022-12-14 11:55:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:55,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:55:55,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438445140] [2022-12-14 11:55:55,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438445140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:55:55,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1806104405] [2022-12-14 11:55:55,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:55:55,554 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:55:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:55:55,555 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:55:55,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-14 11:55:55,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:55:55,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:55:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:55:55,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:55,934 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:55:55,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:55:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:57,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:59,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1806104405] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:55:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374537958] [2022-12-14 11:55:59,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:55:59,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:59,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:59,393 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:59,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 11:55:59,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:55:59,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:55:59,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:55:59,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:59,643 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:55:59,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:56:01,294 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 7 treesize of output 5 [2022-12-14 11:56:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:56:01,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:56:01,539 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 8 treesize of output 6 [2022-12-14 11:56:01,559 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 44 treesize of output 9 [2022-12-14 11:56:01,571 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:56:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:56:06,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374537958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:56:06,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:56:06,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 71 [2022-12-14 11:56:06,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150958007] [2022-12-14 11:56:06,547 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:56:06,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 11:56:06,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:56:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 11:56:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=4687, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 11:56:06,548 INFO L87 Difference]: Start difference. First operand 2465 states and 8097 transitions. Second operand has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 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 11:57:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:57:38,052 INFO L93 Difference]: Finished difference Result 13692 states and 44230 transitions. [2022-12-14 11:57:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-14 11:57:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 11:57:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:57:38,077 INFO L225 Difference]: With dead ends: 13692 [2022-12-14 11:57:38,077 INFO L226 Difference]: Without dead ends: 13692 [2022-12-14 11:57:38,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7052 ImplicationChecksByTransitivity, 74.7s TimeCoverageRelationStatistics Valid=3733, Invalid=20137, Unknown=0, NotChecked=0, Total=23870 [2022-12-14 11:57:38,079 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6462 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9512 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6462 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 9512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:57:38,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6462 Valid, 0 Invalid, 9556 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [44 Valid, 9512 Invalid, 0 Unknown, 0 Unchecked, 27.5s Time] [2022-12-14 11:57:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13692 states. [2022-12-14 11:57:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13692 to 3656. [2022-12-14 11:57:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3651 states have (on average 3.5716242125445086) internal successors, (13040), 3655 states have internal predecessors, (13040), 0 states have call successors, (0), 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 11:57:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 13040 transitions. [2022-12-14 11:57:38,192 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 13040 transitions. Word has length 18 [2022-12-14 11:57:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:57:38,192 INFO L495 AbstractCegarLoop]: Abstraction has 3656 states and 13040 transitions. [2022-12-14 11:57:38,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 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 11:57:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 13040 transitions. [2022-12-14 11:57:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 11:57:38,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:57:38,195 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:57:38,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-14 11:57:38,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-12-14 11:57:38,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-12-14 11:57:38,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:57:38,797 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:57:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:57:38,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1845452668, now seen corresponding path program 5 times [2022-12-14 11:57:38,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:57:38,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228601022] [2022-12-14 11:57:38,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:57:38,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:57:38,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:57:38,802 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:57:38,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-14 11:57:38,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:57:38,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:57:39,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 11:57:39,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:57:39,133 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:57:39,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:57:39,655 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 7 treesize of output 5 [2022-12-14 11:57:39,758 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 11:57:39,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:57:40,050 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 8 treesize of output 6 [2022-12-14 11:57:40,076 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 44 treesize of output 9 [2022-12-14 11:57:40,090 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:57:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:57:43,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:57:43,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228601022] [2022-12-14 11:57:43,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228601022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:57:43,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1644181602] [2022-12-14 11:57:43,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:57:43,402 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:57:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:57:43,403 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:57:43,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-12-14 11:57:43,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:57:43,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:57:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:57:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:57:45,046 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 11:57:45,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:57:47,311 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 11:57:47,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1644181602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:57:47,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111569392] [2022-12-14 11:57:47,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:57:47,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:57:47,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:57:47,312 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:57:47,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 11:57:47,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:57:47,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:57:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:57:47,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:57:49,252 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 11:57:49,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:57:50,654 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 11:57:50,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111569392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:57:50,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:57:50,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-12-14 11:57:50,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305343785] [2022-12-14 11:57:50,655 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:57:50,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 11:57:50,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:57:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 11:57:50,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=4357, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 11:57:50,657 INFO L87 Difference]: Start difference. First operand 3656 states and 13040 transitions. Second operand has 72 states, 71 states have (on average 1.352112676056338) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 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 11:58:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:58:36,122 INFO L93 Difference]: Finished difference Result 5108 states and 17032 transitions. [2022-12-14 11:58:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 11:58:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.352112676056338) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have 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 11:58:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:58:36,134 INFO L225 Difference]: With dead ends: 5108 [2022-12-14 11:58:36,134 INFO L226 Difference]: Without dead ends: 5108 [2022-12-14 11:58:36,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=2296, Invalid=12224, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 11:58:36,135 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2715 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10694 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2715 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 10694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:58:36,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2715 Valid, 0 Invalid, 10773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 10694 Invalid, 0 Unknown, 0 Unchecked, 22.6s Time] [2022-12-14 11:58:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2022-12-14 11:58:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 3117. [2022-12-14 11:58:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3112 states have (on average 3.363431876606684) internal successors, (10467), 3116 states have internal predecessors, (10467), 0 states have call successors, (0), 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 11:58:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 10467 transitions. [2022-12-14 11:58:36,187 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 10467 transitions. Word has length 18 [2022-12-14 11:58:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:58:36,187 INFO L495 AbstractCegarLoop]: Abstraction has 3117 states and 10467 transitions. [2022-12-14 11:58:36,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.352112676056338) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 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 11:58:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 10467 transitions. [2022-12-14 11:58:36,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:58:36,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:58:36,191 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-12-14 11:58:36,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-12-14 11:58:36,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-12-14 11:58:36,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 11:58:36,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:58:36,793 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-12-14 11:58:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:58:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1651496825, now seen corresponding path program 4 times [2022-12-14 11:58:36,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:58:36,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839411983] [2022-12-14 11:58:36,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:58:36,796 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 11:58:36,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:58:36,799 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -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 11:58:36,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-12-14 11:58:37,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:58:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:58:37,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 11:58:37,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:58:37,101 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:58:37,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:58:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:58:38,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:58:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:58:48,566 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:58:48,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839411983] [2022-12-14 11:58:48,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839411983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:58:48,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653128586] [2022-12-14 11:58:48,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:58:48,566 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:58:48,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:58:48,567 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:58:48,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-12-14 11:58:48,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:58:48,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:58:48,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 11:58:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:58:49,075 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:58:49,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:58:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:58:49,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:58:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:58:51,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1653128586] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:58:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484614443] [2022-12-14 11:58:51,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:58:51,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:58:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:58:51,228 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:58:51,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2733d9b3-8a35-405f-b950-cdfbac0973f3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 11:58:51,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:58:51,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:58:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 11:58:51,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:58:51,557 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:58:51,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:58:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:58:53,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:58:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:58:54,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484614443] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:58:54,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:58:54,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 63 [2022-12-14 11:58:54,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245820830] [2022-12-14 11:58:54,036 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:58:54,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 11:58:54,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:58:54,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 11:58:54,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=3080, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 11:58:54,037 INFO L87 Difference]: Start difference. First operand 3117 states and 10467 transitions. Second operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 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 11:59:17,504 WARN L233 SmtUtils]: Spent 10.92s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:59:30,549 WARN L233 SmtUtils]: Spent 11.12s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:59:43,290 WARN L233 SmtUtils]: Spent 10.82s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:00:10,026 WARN L233 SmtUtils]: Spent 25.32s on a formula simplification. DAG size of input: 254 DAG size of output: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:00:18,956 WARN L233 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:00:41,683 WARN L233 SmtUtils]: Spent 21.38s on a formula simplification. DAG size of input: 246 DAG size of output: 246 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:00:51,688 WARN L233 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:01:13,362 WARN L233 SmtUtils]: Spent 20.13s on a formula simplification. DAG size of input: 236 DAG size of output: 236 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:01:22,351 WARN L233 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:01:38,308 WARN L233 SmtUtils]: Spent 14.57s on a formula simplification. DAG size of input: 225 DAG size of output: 225 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:01:48,344 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:02:02,186 WARN L233 SmtUtils]: Spent 12.38s on a formula simplification. DAG size of input: 214 DAG size of output: 214 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:02:09,450 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:02:25,654 WARN L233 SmtUtils]: Spent 14.73s on a formula simplification. DAG size of input: 203 DAG size of output: 203 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:02:44,614 WARN L233 SmtUtils]: Spent 10.76s on a formula simplification. DAG size of input: 194 DAG size of output: 193 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:02:59,949 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 186 DAG size of output: 182 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:03:13,089 WARN L233 SmtUtils]: Spent 6.73s on a formula simplification. DAG size of input: 175 DAG size of output: 171 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:03:24,041 WARN L233 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 164 DAG size of output: 160 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)